mirror of
https://github.com/ovh/debian-cis.git
synced 2025-06-22 02:33:42 +02:00
Migrate generic checks from secaudit to cis-hardening
new file: 99.3.1_acc_shadow_sha512.sh new file: 99.3.2_acc_sudoers_no_all.sh new file: 99.4_net_fw_default_policy_drop.sh new file: 99.5.1_ssh_auth_pubk_only.sh new file: 99.5.2.1_ssh_cry_kex.sh new file: 99.5.2.2_ssh_cry_mac.sh new file: 99.5.2.3_ssh_cry_rekey.sh new file: 99.5.3_ssh_disable_features.sh new file: 99.5.4_ssh_keys_from.sh new file: 99.5.5_ssh_strict_modes.sh new file: 99.5.6_ssh_sys_accept_env.sh new file: 99.5.7_ssh_sys_no_legacy.sh new file: 99.5.8_ssh_sys_sandbox.sh new file: 99.5.9_ssh_log_level.sh Fix descriptions in comment section for 99.* secaudit checks Remove duplicated legacy services that are already taken care of by vanilla cis Enable custom configuration of checks in config-file, no more hard coded conf Add test to disable check if debian version is too old Add excused IPs while checking "from" field of authorized_keys Escaping dots in IPs Manage Kex for different debian versions Add tests for generic checks and add apply for ssh config Apply shellcheck recommendations on audit/hardening scripts Update script to check for allowed IPs only, remove bastion related Fill `apply` func for ssh config related scripts Add and update tests scenarii Disable shellcheck test for external source 1091 As of today, the entire project is not shellcheck compliant, I prefer disabling the test that warns about not finding external source (that arent compliant). I will enable it again when the project library will be shellchecked https://github.com/koalaman/shellcheck/wiki/SC1091 Refactor password policy check with one check by feature Previous file will now only look for bad passwords in /etc/shadow I added two checks that look for the compliant configuration lines in conf files /etc/logins.defs and /etc/pam.d/common-passwords FIX: merge chained sed and fix regex FIX: update regex to capture more output FIX: fix pattern to ignore commented lines, add apply Also add tests to ensure that commented lines are not detected as valid configuration CHORE: cleanup test situation with file and users removal IMP: add case insensitive option when looking for patterns in files CHORE: removed duplicated line in test file
This commit is contained in:
Charles Herlin
79
bin/hardening/99.3.1_acc_shadow_sha512.sh
Executable file
79
bin/hardening/99.3.1_acc_shadow_sha512.sh
Executable file
@ -0,0 +1,79 @@
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#!/bin/bash
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# run-shellcheck
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#
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# OVH Security audit
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#
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#
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# Check that any password that may exist in /etc/shadow is SHA512 hashed and salted
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#
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set -e # One error, it's over
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set -u # One variable unset, it's over
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# shellcheck disable=2034
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DESCRIPTION="Check that any password that may exist in /etc/shadow is SHA512 hashed and salted"
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FILE="/etc/shadow"
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# This function will be called if the script status is on enabled / audit mode
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audit () {
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# Review shadow file for existing passwords
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pw_found=""
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users_reviewed=""
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if $SUDO_CMD [ ! -r "$FILE" ]; then
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crit "$FILE is not readable"
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return
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fi
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for line in $($SUDO_CMD cut -d ":" -f 1,2 /etc/shadow); do
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users_reviewed+="$line "
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user=$(echo "$line" | cut -d ":" -f 1)
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passwd=$(echo "$line" | cut -d ":" -f 2)
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if [[ $passwd = '!' || $passwd = '*' ]]; then
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continue
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# Check password against $6$<salt>$<encrypted>, see `man 3 crypt`
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elif [[ $passwd =~ ^\$6\$[a-zA-Z0-9./]{2,16}\$[a-zA-Z0-9./]{86}$ ]]; then
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pw_found+="$user "
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ok "User $user has suitable SHA512 hashed password."
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else
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pw_found+="$user "
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crit "User $user has a password that is not SHA512 hashed."
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fi
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done
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if [[ -z "$users_reviewed" ]]; then
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crit "No users were reviewed in $FILE !"
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return
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fi
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if [[ -z "$pw_found" ]]; then
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ok "There is no password in $FILE"
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fi
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}
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# This function will be called if the script status is on enabled mode
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apply () {
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:
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}
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# This function will check config parameters required
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check_config() {
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:
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}
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# Source Root Dir Parameter
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if [ -r /etc/default/cis-hardening ]; then
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. /etc/default/cis-hardening
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fi
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if [ -z "$CIS_ROOT_DIR" ]; then
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echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
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echo "Cannot source CIS_ROOT_DIR variable, aborting."
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exit 128
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fi
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# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
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if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
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# shellcheck source=/opt/debian-cis/lib/main.sh
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. "$CIS_ROOT_DIR"/lib/main.sh
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else
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echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
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exit 128
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fi
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99
bin/hardening/99.3.2_acc_sudoers_no_all.sh
Executable file
99
bin/hardening/99.3.2_acc_sudoers_no_all.sh
Executable file
@ -0,0 +1,99 @@
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#!/bin/bash
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# run-shellcheck
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#
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# OVH Security audit
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#
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#
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# Checks there are no carte-blanche authorization in sudoers file(s).
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#
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set -e # One error, it's over
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set -u # One variable unset, it's over
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# shellcheck disable=2034
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DESCRIPTION="Checks there are no carte-blanche authorization in sudoers file(s)."
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FILE="/etc/sudoers"
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DIRECTORY="/etc/sudoers.d"
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# spaces will be expanded to [:space:]* when using the regex
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# improves readability in audit report
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REGEX="ALL = \( ALL( : ALL)? \)( NOPASSWD:)? ALL"
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EXCEPT=""
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# This function will be called if the script status is on enabled / audit mode
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audit () {
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FILES=""
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if $SUDO_CMD [ ! -r "$FILE" ]; then
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crit "$FILE is not readable"
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return
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fi
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FILES="$FILE"
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if $SUDO_CMD [ ! -d "$DIRECTORY" ]; then
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debug "$DIRECTORY does not exist"
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elif $SUDO_CMD [ ! -x "$DIRECTORY" ]; then
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crit "Cannot browse $DIRECTORY"
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else
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FILES="$FILES $($SUDO_CMD ls -1 $DIRECTORY | sed s=^=$DIRECTORY/= )"
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fi
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for file in $FILES; do
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if $SUDO_CMD [ ! -r "$file" ]; then
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crit "$file is not readable"
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else
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# shellcheck disable=2001
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if ! $SUDO_CMD grep -E "$(echo "$REGEX" | sed 's/ /[[:space:]]*/g')" "$file" &> /dev/null ; then
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ok "There is no carte-blanche sudo permission in $file"
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else
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# shellcheck disable=2001
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RET=$($SUDO_CMD grep -E "$(echo "$REGEX" | sed 's/ /[[:space:]]*/g')" "$file" | sed 's/\t/#/g;s/ /#/g' )
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for line in $RET; do
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if grep -q "$(echo "$line" | cut -d '#' -f 1)" <<< "$EXCEPT" ; then
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# shellcheck disable=2001
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ok "$(echo "$line" | sed 's/#/ /g') is present in $file but was EXCUSED because $(echo "$line" | cut -d '#' -f 1) is part of exceptions."
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continue
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fi
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# shellcheck disable=2001
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crit "$(echo "$line" | sed 's/#/ /g') is present in $file"
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done
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fi
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fi
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done
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}
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# This function will be called if the script status is on enabled mode
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apply () {
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:
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}
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# This function will create the config file for this check with default values
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create_config() {
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cat <<EOF
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status=disabled
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# Put EXCEPTION account names here, space separated
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EXCEPT="root %root %sudo %wheel"
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EOF
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}
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# This function will check config parameters required
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check_config() {
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:
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}
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# Source Root Dir Parameter
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if [ -r /etc/default/cis-hardening ]; then
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. /etc/default/cis-hardening
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fi
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if [ -z "$CIS_ROOT_DIR" ]; then
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echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
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echo "Cannot source CIS_ROOT_DIR variable, aborting."
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exit 128
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fi
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# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
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if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
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# shellcheck source=/opt/debian-cis/lib/main.sh
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. "$CIS_ROOT_DIR"/lib/main.sh
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else
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echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
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exit 128
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fi
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62
bin/hardening/99.3.3_acc_pam_sha512.sh
Executable file
62
bin/hardening/99.3.3_acc_pam_sha512.sh
Executable file
@ -0,0 +1,62 @@
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#!/bin/bash
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# run-shellcheck
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#
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# OVH Security audit
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#
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#
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# Check that any password that may exist in /etc/shadow is SHA512 hashed and salted
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#
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set -e # One error, it's over
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set -u # One variable unset, it's over
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# shellcheck disable=2034
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DESCRIPTION="Check that any password that may exist in /etc/shadow is SHA512 hashed and salted"
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CONF_FILE="/etc/pam.d/common-password"
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CONF_LINE="^\s*password\s.+\s+pam_unix\.so\s+.*sha512"
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# This function will be called if the script status is on enabled / audit mode
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audit () {
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# Check conf file for default SHA512 hash
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if $SUDO_CMD [ ! -r $CONF_FILE ]; then
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crit "$CONF_FILE is not readable"
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else
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does_pattern_exist_in_file $CONF_FILE "$(sed 's/ /[[:space:]]+/g' <<< "$CONF_LINE")"
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if [ "$FNRET" = 0 ]; then
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ok "$CONF_LINE is present in $CONF_FILE"
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else
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crit "$CONF_LINE is not present in $CONF_FILE"
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fi
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fi
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}
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# This function will be called if the script status is on enabled mode
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apply () {
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:
|
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}
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|
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# This function will check config parameters required
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check_config() {
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:
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}
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# Source Root Dir Parameter
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if [ -r /etc/default/cis-hardening ]; then
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. /etc/default/cis-hardening
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fi
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if [ -z "$CIS_ROOT_DIR" ]; then
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echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
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echo "Cannot source CIS_ROOT_DIR variable, aborting."
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exit 128
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fi
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# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
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if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
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# shellcheck source=/opt/debian-cis/lib/main.sh
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. "$CIS_ROOT_DIR"/lib/main.sh
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else
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echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
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exit 128
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fi
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76
bin/hardening/99.3.4_acc_logindefs_sha512.sh
Executable file
76
bin/hardening/99.3.4_acc_logindefs_sha512.sh
Executable file
@ -0,0 +1,76 @@
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#!/bin/bash
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# run-shellcheck
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||||
#
|
||||
# OVH Security audit
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||||
#
|
||||
|
||||
#
|
||||
# Check that any password that may exist in /etc/shadow is SHA512 hashed and salted
|
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#
|
||||
|
||||
set -e # One error, it's over
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set -u # One variable unset, it's over
|
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|
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# shellcheck disable=2034
|
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DESCRIPTION="Check that any password that may exist in /etc/shadow is SHA512 hashed and salted"
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|
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CONF_FILE="/etc/login.defs"
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CONF_LINE="ENCRYPT_METHOD SHA512"
|
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|
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# This function will be called if the script status is on enabled / audit mode
|
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audit () {
|
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# Check conf file for default SHA512 hash
|
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if $SUDO_CMD [ ! -r $CONF_FILE ]; then
|
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crit "$CONF_FILE is not readable"
|
||||
else
|
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does_pattern_exist_in_file $CONF_FILE "^ *${CONF_LINE/ /[[:space:]]+}"
|
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if [ "$FNRET" = 0 ]; then
|
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ok "$CONF_LINE is present in $CONF_FILE"
|
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else
|
||||
crit "$CONF_LINE is not present in $CONF_FILE"
|
||||
fi
|
||||
fi
|
||||
}
|
||||
|
||||
# This function will be called if the script status is on enabled mode
|
||||
apply () {
|
||||
does_pattern_exist_in_file $CONF_FILE "^ *${CONF_LINE/ /[[:space:]]+}"
|
||||
if [ "$FNRET" = 0 ]; then
|
||||
ok "$CONF_LINE is present in $CONF_FILE"
|
||||
else
|
||||
warn "$CONF_LINE is not present in $CONF_FILE, adding it"
|
||||
does_pattern_exist_in_file "$CONF_FILE" "^$(echo "$CONF_LINE" | cut -d ' ' -f1)"
|
||||
if [ "$FNRET" != 0 ]; then
|
||||
add_end_of_file $CONF_FILE "$CONF_LINE"
|
||||
else
|
||||
info "Parameter $SSH_PARAM is present but with the wrong value -- Fixing"
|
||||
replace_in_file "$CONF_FILE" "^$(echo "$CONF_LINE" | cut -d ' ' -f1)[[:space:]]*.*" "$CONF_LINE"
|
||||
fi
|
||||
/etc/init.d/ssh reload > /dev/null 2>&1
|
||||
fi
|
||||
}
|
||||
|
||||
# This function will check config parameters required
|
||||
check_config() {
|
||||
:
|
||||
}
|
||||
|
||||
# Source Root Dir Parameter
|
||||
if [ -r /etc/default/cis-hardening ]; then
|
||||
. /etc/default/cis-hardening
|
||||
fi
|
||||
if [ -z "$CIS_ROOT_DIR" ]; then
|
||||
echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
|
||||
echo "Cannot source CIS_ROOT_DIR variable, aborting."
|
||||
exit 128
|
||||
fi
|
||||
|
||||
# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
|
||||
if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
|
||||
# shellcheck source=/opt/debian-cis/lib/main.sh
|
||||
. "$CIS_ROOT_DIR"/lib/main.sh
|
||||
else
|
||||
echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
|
||||
exit 128
|
||||
fi
|
||||
|
||||
78
bin/hardening/99.4_net_fw_default_policy_drop.sh
Executable file
78
bin/hardening/99.4_net_fw_default_policy_drop.sh
Executable file
@ -0,0 +1,78 @@
|
||||
#!/bin/bash
|
||||
# run-shellcheck
|
||||
#
|
||||
# OVH Security audit
|
||||
#
|
||||
|
||||
#
|
||||
# Check iptables firewall default policy for DROP on INPUT and FORWARD.
|
||||
#
|
||||
|
||||
set -e # One error, it's over
|
||||
set -u # One variable unset, it's over
|
||||
|
||||
# shellcheck disable=2034
|
||||
HARDENING_LEVEL=2
|
||||
# shellcheck disable=2034
|
||||
DESCRIPTION="Check iptables firewall default policy for DROP on INPUT and FORWARD."
|
||||
|
||||
PACKAGE="iptables"
|
||||
FW_CHAINS="INPUT FORWARD"
|
||||
FW_POLICY="DROP"
|
||||
|
||||
# This function will be called if the script status is on enabled / audit mode
|
||||
audit () {
|
||||
is_pkg_installed $PACKAGE
|
||||
if [ "$FNRET" != 0 ]; then
|
||||
crit "$PACKAGE is not installed!"
|
||||
else
|
||||
ipt=$($SUDO_CMD $PACKAGE -nL || true )
|
||||
if [[ -z $ipt ]]; then
|
||||
crit "Empty return from $PACKAGE command. Aborting..."
|
||||
return
|
||||
fi
|
||||
for chain in $FW_CHAINS; do
|
||||
regex="Chain $chain \(policy ([A-Z]+)\)"
|
||||
# previous line will capture actual policy
|
||||
if [[ $ipt =~ $regex ]]; then
|
||||
actual_policy=${BASH_REMATCH[1]}
|
||||
if [[ $actual_policy == "$FW_POLICY" ]]; then
|
||||
ok "Policy correctly set to $FW_POLICY for chain $chain"
|
||||
else
|
||||
crit "Policy set to $actual_policy for chain $chain, should be ${FW_POLICY}."
|
||||
fi
|
||||
else
|
||||
echo "cant find chain $chain"
|
||||
fi
|
||||
done
|
||||
fi
|
||||
}
|
||||
|
||||
# This function will be called if the script status is on enabled mode
|
||||
apply () {
|
||||
:
|
||||
}
|
||||
|
||||
# This function will check config parameters required
|
||||
check_config() {
|
||||
:
|
||||
}
|
||||
|
||||
# Source Root Dir Parameter
|
||||
if [ -r /etc/default/cis-hardening ]; then
|
||||
. /etc/default/cis-hardening
|
||||
fi
|
||||
if [ -z "$CIS_ROOT_DIR" ]; then
|
||||
echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
|
||||
echo "Cannot source CIS_ROOT_DIR variable, aborting."
|
||||
exit 128
|
||||
fi
|
||||
|
||||
# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
|
||||
if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
|
||||
# shellcheck source=/opt/debian-cis/lib/main.sh
|
||||
. "$CIS_ROOT_DIR"/lib/main.sh
|
||||
else
|
||||
echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
|
||||
exit 128
|
||||
fi
|
||||
97
bin/hardening/99.5.1_ssh_auth_pubk_only.sh
Executable file
97
bin/hardening/99.5.1_ssh_auth_pubk_only.sh
Executable file
@ -0,0 +1,97 @@
|
||||
#!/bin/bash
|
||||
# run-shellcheck
|
||||
|
||||
#
|
||||
# OVH Security audit
|
||||
#
|
||||
|
||||
#
|
||||
# Ensure that sshd only allows authentication through public key.
|
||||
#
|
||||
|
||||
set -e # One error, it's over
|
||||
set -u # One variable unset, it's over
|
||||
|
||||
# shellcheck disable=2034
|
||||
HARDENING_LEVEL=2
|
||||
# shellcheck disable=2034
|
||||
DESCRIPTION="Ensure that sshd only allows authentication through public key."
|
||||
|
||||
PACKAGE='openssh-server'
|
||||
FILE='/etc/ssh/sshd_config'
|
||||
OPTIONS='PubkeyAuthentication=yes PasswordAuthentication=no KbdInteractiveAuthentication=no KerberosAuthentication=no ChallengeResponseAuthentication=no HostbasedAuthentication=no GSSAPIAuthentication=no GSSAPIKeyExchange=no '
|
||||
|
||||
# This function will be called if the script status is on enabled / audit mode
|
||||
audit () {
|
||||
is_pkg_installed $PACKAGE
|
||||
if [ "$FNRET" != 0 ]; then
|
||||
crit "$PACKAGE is not installed!"
|
||||
else
|
||||
ok "$PACKAGE is installed"
|
||||
for SSH_OPTION in $OPTIONS; do
|
||||
SSH_PARAM=$(echo "$SSH_OPTION" | cut -d= -f 1)
|
||||
SSH_VALUE=$(echo "$SSH_OPTION" | cut -d= -f 2)
|
||||
PATTERN="^$SSH_PARAM[[:space:]]+$SSH_VALUE"
|
||||
does_pattern_exist_in_file_nocase $FILE "$PATTERN"
|
||||
if [ "$FNRET" = 0 ]; then
|
||||
ok "$PATTERN is present in $FILE"
|
||||
else
|
||||
crit "$PATTERN is not present in $FILE"
|
||||
fi
|
||||
done
|
||||
fi
|
||||
}
|
||||
|
||||
# This function will be called if the script status is on enabled mode
|
||||
apply () {
|
||||
is_pkg_installed $PACKAGE
|
||||
if [ "$FNRET" = 0 ]; then
|
||||
ok "$PACKAGE is installed"
|
||||
else
|
||||
crit "$PACKAGE is absent, installing it"
|
||||
apt_install $PACKAGE
|
||||
fi
|
||||
for SSH_OPTION in $OPTIONS; do
|
||||
SSH_PARAM=$(echo "$SSH_OPTION" | cut -d= -f 1)
|
||||
SSH_VALUE=$(echo "$SSH_OPTION" | cut -d= -f 2)
|
||||
PATTERN="^$SSH_PARAM[[:space:]]+$SSH_VALUE"
|
||||
does_pattern_exist_in_file_nocase $FILE "$PATTERN"
|
||||
if [ "$FNRET" = 0 ]; then
|
||||
ok "$PATTERN is present in $FILE"
|
||||
else
|
||||
warn "$PATTERN is not present in $FILE, adding it"
|
||||
does_pattern_exist_in_file_nocase $FILE "^$SSH_PARAM"
|
||||
if [ "$FNRET" != 0 ]; then
|
||||
add_end_of_file $FILE "$SSH_PARAM $SSH_VALUE"
|
||||
else
|
||||
info "Parameter $SSH_PARAM is present but with the wrong value -- Fixing"
|
||||
replace_in_file $FILE "^$SSH_PARAM[[:space:]]+.*" "$SSH_PARAM $SSH_VALUE"
|
||||
fi
|
||||
/etc/init.d/ssh reload > /dev/null 2>&1
|
||||
fi
|
||||
done
|
||||
}
|
||||
|
||||
# This function will check config parameters required
|
||||
check_config() {
|
||||
:
|
||||
}
|
||||
|
||||
# Source Root Dir Parameter
|
||||
if [ -r /etc/default/cis-hardening ]; then
|
||||
. /etc/default/cis-hardening
|
||||
fi
|
||||
if [ -z "$CIS_ROOT_DIR" ]; then
|
||||
echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
|
||||
echo "Cannot source CIS_ROOT_DIR variable, aborting."
|
||||
exit 128
|
||||
fi
|
||||
|
||||
# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
|
||||
if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
|
||||
# shellcheck source=/opt/debian-cis/lib/main.sh
|
||||
. "$CIS_ROOT_DIR"/lib/main.sh
|
||||
else
|
||||
echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
|
||||
exit 128
|
||||
fi
|
||||
117
bin/hardening/99.5.2.1_ssh_cry_kex.sh
Executable file
117
bin/hardening/99.5.2.1_ssh_cry_kex.sh
Executable file
@ -0,0 +1,117 @@
|
||||
#!/bin/bash
|
||||
# run-shellcheck
|
||||
|
||||
#
|
||||
# CIS Debian 7/8 Hardening
|
||||
#
|
||||
|
||||
#
|
||||
# Checking key exchange ciphers.
|
||||
#
|
||||
|
||||
set -e # One error, it's over
|
||||
set -u # One variable unset, it's over
|
||||
|
||||
# shellcheck disable=2034
|
||||
HARDENING_LEVEL=2
|
||||
# shellcheck disable=2034
|
||||
DESCRIPTION="Checking key exchange ciphers."
|
||||
|
||||
PACKAGE='openssh-server'
|
||||
OPTIONS=''
|
||||
FILE='/etc/ssh/sshd_config'
|
||||
|
||||
# This function will be called if the script status is on enabled / audit mode
|
||||
audit () {
|
||||
is_pkg_installed $PACKAGE
|
||||
if [ "$FNRET" != 0 ]; then
|
||||
crit "$PACKAGE is not installed!"
|
||||
else
|
||||
ok "$PACKAGE is installed"
|
||||
for SSH_OPTION in $OPTIONS; do
|
||||
SSH_PARAM=$(echo $SSH_OPTION | cut -d= -f 1)
|
||||
SSH_VALUE=$(echo $SSH_OPTION | cut -d= -f 2)
|
||||
PATTERN="^$SSH_PARAM[[:space:]]*$SSH_VALUE"
|
||||
does_pattern_exist_in_file_nocase $FILE "$PATTERN"
|
||||
if [ "$FNRET" = 0 ]; then
|
||||
ok "$PATTERN is present in $FILE"
|
||||
else
|
||||
crit "$PATTERN is not present in $FILE"
|
||||
fi
|
||||
done
|
||||
fi
|
||||
}
|
||||
|
||||
# This function will be called if the script status is on enabled mode
|
||||
apply () {
|
||||
is_pkg_installed $PACKAGE
|
||||
if [ "$FNRET" = 0 ]; then
|
||||
ok "$PACKAGE is installed"
|
||||
else
|
||||
crit "$PACKAGE is absent, installing it"
|
||||
apt_install $PACKAGE
|
||||
fi
|
||||
for SSH_OPTION in $OPTIONS; do
|
||||
SSH_PARAM=$(echo $SSH_OPTION | cut -d= -f 1)
|
||||
SSH_VALUE=$(echo $SSH_OPTION | cut -d= -f 2)
|
||||
PATTERN="^$SSH_PARAM[[:space:]]*$SSH_VALUE"
|
||||
does_pattern_exist_in_file_nocase $FILE "$PATTERN"
|
||||
if [ "$FNRET" = 0 ]; then
|
||||
ok "$PATTERN is present in $FILE"
|
||||
else
|
||||
warn "$PATTERN is not present in $FILE, adding it"
|
||||
does_pattern_exist_in_file_nocase $FILE "^$SSH_PARAM"
|
||||
if [ "$FNRET" != 0 ]; then
|
||||
add_end_of_file $FILE "$SSH_PARAM $SSH_VALUE"
|
||||
else
|
||||
info "Parameter $SSH_PARAM is present but with the wrong value -- Fixing"
|
||||
replace_in_file $FILE "^$SSH_PARAM[[:space:]]*.*" "$SSH_PARAM $SSH_VALUE"
|
||||
fi
|
||||
/etc/init.d/ssh reload > /dev/null 2>&1
|
||||
fi
|
||||
done
|
||||
}
|
||||
|
||||
create_config() {
|
||||
get_debian_major_version
|
||||
set +u
|
||||
debug "Debian version : $DEB_MAJ_VER "
|
||||
if [[ -z $DEB_MAJ_VER ]] || [[ 7 -eq $DEB_MAJ_VER ]]; then
|
||||
KEX='diffie-hellman-group-exchange-sha256'
|
||||
elif [[ 8 -eq $DEB_MAJ_VER ]] || [[ 9 -eq $DEB_MAJ_VER ]]; then
|
||||
KEX='curve25519-sha256@libssh.org,diffie-hellman-group-exchange-sha256'
|
||||
else
|
||||
KEX='diffie-hellman-group-exchange-sha256'
|
||||
fi
|
||||
set -u
|
||||
cat <<EOF
|
||||
status=disabled
|
||||
# Put your KexAlgorithms
|
||||
OPTIONS="KexAlgorithms=$KEX"
|
||||
EOF
|
||||
}
|
||||
|
||||
|
||||
# This function will check config parameters required
|
||||
check_config() {
|
||||
:
|
||||
}
|
||||
|
||||
# Source Root Dir Parameter
|
||||
if [ -r /etc/default/cis-hardening ]; then
|
||||
. /etc/default/cis-hardening
|
||||
fi
|
||||
if [ -z "$CIS_ROOT_DIR" ]; then
|
||||
echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
|
||||
echo "Cannot source CIS_ROOT_DIR variable, aborting."
|
||||
exit 128
|
||||
fi
|
||||
|
||||
# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
|
||||
if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
|
||||
# shellcheck source=/opt/debian-cis/lib/main.sh
|
||||
. "$CIS_ROOT_DIR"/lib/main.sh
|
||||
else
|
||||
echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
|
||||
exit 128
|
||||
fi
|
||||
107
bin/hardening/99.5.2.2_ssh_cry_mac.sh
Executable file
107
bin/hardening/99.5.2.2_ssh_cry_mac.sh
Executable file
@ -0,0 +1,107 @@
|
||||
#!/bin/bash
|
||||
# run-shellcheck
|
||||
|
||||
#
|
||||
# CIS Debian 7/8 Hardening
|
||||
#
|
||||
|
||||
#
|
||||
# Checking Message Authentication Code ciphers for preferred UMAC and SHA-256|512 with Encrypt-Then-Mac (etm) setting.
|
||||
#
|
||||
|
||||
set -e # One error, it's over
|
||||
set -u # One variable unset, it's over
|
||||
|
||||
# shellcheck disable=2034
|
||||
HARDENING_LEVEL=2
|
||||
# shellcheck disable=2034
|
||||
DESCRIPTION="Checking Message Authentication Code ciphers for preferred UMAC and SHA-256|512 with Encrypt-Then-Mac (etm) setting."
|
||||
|
||||
PACKAGE='openssh-server'
|
||||
OPTIONS=''
|
||||
FILE='/etc/ssh/sshd_config'
|
||||
|
||||
# This function will be called if the script status is on enabled / audit mode
|
||||
audit () {
|
||||
is_pkg_installed $PACKAGE
|
||||
if [ "$FNRET" != 0 ]; then
|
||||
crit "$PACKAGE is not installed!"
|
||||
else
|
||||
ok "$PACKAGE is installed"
|
||||
for SSH_OPTION in $OPTIONS; do
|
||||
SSH_PARAM=$(echo $SSH_OPTION | cut -d= -f 1)
|
||||
SSH_VALUE=$(echo $SSH_OPTION | cut -d= -f 2)
|
||||
PATTERN="^$SSH_PARAM[[:space:]]*$SSH_VALUE"
|
||||
does_pattern_exist_in_file_nocase $FILE "$PATTERN"
|
||||
if [ "$FNRET" = 0 ]; then
|
||||
ok "$PATTERN is present in $FILE"
|
||||
else
|
||||
crit "$PATTERN is not present in $FILE"
|
||||
fi
|
||||
done
|
||||
fi
|
||||
}
|
||||
|
||||
# This function will be called if the script status is on enabled mode
|
||||
apply () {
|
||||
is_pkg_installed $PACKAGE
|
||||
if [ "$FNRET" = 0 ]; then
|
||||
ok "$PACKAGE is installed"
|
||||
else
|
||||
crit "$PACKAGE is absent, installing it"
|
||||
apt_install $PACKAGE
|
||||
fi
|
||||
for SSH_OPTION in $OPTIONS; do
|
||||
SSH_PARAM=$(echo $SSH_OPTION | cut -d= -f 1)
|
||||
SSH_VALUE=$(echo $SSH_OPTION | cut -d= -f 2)
|
||||
PATTERN="^$SSH_PARAM[[:space:]]*$SSH_VALUE"
|
||||
does_pattern_exist_in_file_nocase $FILE "$PATTERN"
|
||||
if [ "$FNRET" = 0 ]; then
|
||||
ok "$PATTERN is present in $FILE"
|
||||
else
|
||||
warn "$PATTERN is not present in $FILE, adding it"
|
||||
does_pattern_exist_in_file_nocase $FILE "^$SSH_PARAM"
|
||||
if [ "$FNRET" != 0 ]; then
|
||||
add_end_of_file $FILE "$SSH_PARAM $SSH_VALUE"
|
||||
else
|
||||
info "Parameter $SSH_PARAM is present but with the wrong value -- Fixing"
|
||||
replace_in_file $FILE "^$SSH_PARAM[[:space:]]*.*" "$SSH_PARAM $SSH_VALUE"
|
||||
fi
|
||||
/etc/init.d/ssh reload > /dev/null 2>&1
|
||||
fi
|
||||
done
|
||||
|
||||
}
|
||||
|
||||
# This function will create the config file for this check with default values
|
||||
create_config() {
|
||||
cat <<EOF
|
||||
status=disabled
|
||||
# Put your MACs
|
||||
OPTIONS="MACs=umac-128-etm@openssh.com,umac-64-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha2-256-etm@openssh.com,umac-128@openssh.com,umac-64@openssh.com,hmac-sha2-512,hmac-sha2-256"
|
||||
EOF
|
||||
}
|
||||
|
||||
# This function will check config parameters required
|
||||
check_config() {
|
||||
:
|
||||
}
|
||||
|
||||
# Source Root Dir Parameter
|
||||
if [ -r /etc/default/cis-hardening ]; then
|
||||
. /etc/default/cis-hardening
|
||||
fi
|
||||
if [ -z "$CIS_ROOT_DIR" ]; then
|
||||
echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
|
||||
echo "Cannot source CIS_ROOT_DIR variable, aborting."
|
||||
exit 128
|
||||
fi
|
||||
|
||||
# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
|
||||
if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
|
||||
# shellcheck source=/opt/debian-cis/lib/main.sh
|
||||
. "$CIS_ROOT_DIR"/lib/main.sh
|
||||
else
|
||||
echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
|
||||
exit 128
|
||||
fi
|
||||
113
bin/hardening/99.5.2.3_ssh_cry_rekey.sh
Executable file
113
bin/hardening/99.5.2.3_ssh_cry_rekey.sh
Executable file
@ -0,0 +1,113 @@
|
||||
#!/bin/bash
|
||||
# run-shellcheck
|
||||
|
||||
#
|
||||
# CIS Debian 7/8 Hardening
|
||||
#
|
||||
|
||||
#
|
||||
# Checking rekey limit for time (6 hours) or volume (512Mio) whichever comes first.
|
||||
#
|
||||
|
||||
set -e # One error, it's over
|
||||
set -u # One variable unset, it's over
|
||||
|
||||
# shellcheck disable=2034
|
||||
HARDENING_LEVEL=2
|
||||
# shellcheck disable=2034
|
||||
DESCRIPTION="Checking rekey limit for time (6 hours) or volume (512Mio) whichever comes first."
|
||||
|
||||
PACKAGE='openssh-server'
|
||||
OPTIONS='RekeyLimit=512M\s+6h'
|
||||
FILE='/etc/ssh/sshd_config'
|
||||
|
||||
# This function will be called if the script status is on enabled / audit mode
|
||||
audit () {
|
||||
get_debian_major_version
|
||||
set +u
|
||||
debug "Debian version : $DEB_MAJ_VER "
|
||||
if [[ -z $DEB_MAJ_VER ]]; then
|
||||
set -u
|
||||
crit "Cannot get Debian version. Aborting..."
|
||||
return
|
||||
fi
|
||||
if [[ "${DEB_MAJ_VER}" -lt "8" ]]; then
|
||||
set -u
|
||||
warn "Debian version too old (${DEB_MAJ_VER}), check does not apply, you should disable this check."
|
||||
return
|
||||
fi
|
||||
set -u
|
||||
is_pkg_installed $PACKAGE
|
||||
if [ "$FNRET" != 0 ]; then
|
||||
crit "$PACKAGE is not installed!"
|
||||
else
|
||||
ok "$PACKAGE is installed"
|
||||
for SSH_OPTION in $OPTIONS; do
|
||||
SSH_PARAM=$(echo $SSH_OPTION | cut -d= -f 1)
|
||||
SSH_VALUE=$(echo $SSH_OPTION | cut -d= -f 2)
|
||||
PATTERN="^$SSH_PARAM[[:space:]]*$SSH_VALUE"
|
||||
does_pattern_exist_in_file_nocase $FILE "$PATTERN"
|
||||
if [ "$FNRET" = 0 ]; then
|
||||
ok "$PATTERN is present in $FILE"
|
||||
else
|
||||
crit "$PATTERN is not present in $FILE"
|
||||
fi
|
||||
done
|
||||
fi
|
||||
}
|
||||
|
||||
# This function will be called if the script status is on enabled mode
|
||||
apply () {
|
||||
is_pkg_installed $PACKAGE
|
||||
if [ "$FNRET" = 0 ]; then
|
||||
ok "$PACKAGE is installed"
|
||||
else
|
||||
crit "$PACKAGE is absent, installing it"
|
||||
apt_install $PACKAGE
|
||||
fi
|
||||
for SSH_OPTION in $OPTIONS; do
|
||||
SSH_PARAM=$(echo $SSH_OPTION | cut -d= -f 1)
|
||||
SSH_VALUE=$(echo $SSH_OPTION | cut -d= -f 2)
|
||||
PATTERN="^$SSH_PARAM[[:space:]]*$SSH_VALUE"
|
||||
does_pattern_exist_in_file_nocase $FILE "$PATTERN"
|
||||
if [ "$FNRET" = 0 ]; then
|
||||
ok "$PATTERN is present in $FILE"
|
||||
else
|
||||
warn "$PATTERN is not present in $FILE, adding it"
|
||||
does_pattern_exist_in_file_nocase $FILE "^$SSH_PARAM"
|
||||
if [ "$FNRET" != 0 ]; then
|
||||
SSH_VALUE=$(sed 's/\\s+/ /' <<< "$SSH_VALUE")
|
||||
add_end_of_file $FILE "$SSH_PARAM $SSH_VALUE"
|
||||
else
|
||||
info "Parameter $SSH_PARAM is present but with the wrong value -- Fixing"
|
||||
replace_in_file $FILE "^$SSH_PARAM[[:space:]]*.*" "$SSH_PARAM $SSH_VALUE"
|
||||
fi
|
||||
/etc/init.d/ssh reload > /dev/null 2>&1
|
||||
fi
|
||||
done
|
||||
|
||||
}
|
||||
|
||||
# This function will check config parameters required
|
||||
check_config() {
|
||||
:
|
||||
}
|
||||
|
||||
# Source Root Dir Parameter
|
||||
if [ -r /etc/default/cis-hardening ]; then
|
||||
. /etc/default/cis-hardening
|
||||
fi
|
||||
if [ -z "$CIS_ROOT_DIR" ]; then
|
||||
echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
|
||||
echo "Cannot source CIS_ROOT_DIR variable, aborting."
|
||||
exit 128
|
||||
fi
|
||||
|
||||
# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
|
||||
if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
|
||||
# shellcheck source=/opt/debian-cis/lib/main.sh
|
||||
. "$CIS_ROOT_DIR"/lib/main.sh
|
||||
else
|
||||
echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
|
||||
exit 128
|
||||
fi
|
||||
96
bin/hardening/99.5.3_ssh_disable_features.sh
Executable file
96
bin/hardening/99.5.3_ssh_disable_features.sh
Executable file
@ -0,0 +1,96 @@
|
||||
#!/bin/bash
|
||||
# run-shellcheck
|
||||
|
||||
#
|
||||
# OVH Security audit
|
||||
#
|
||||
|
||||
#
|
||||
# Check all special features in sshd_config are disabled
|
||||
#
|
||||
|
||||
set -e # One error, it's over
|
||||
set -u # One variable unset, it's over
|
||||
|
||||
# shellcheck disable=2034
|
||||
DESCRIPTION="Check all special features in sshd_config are disabled"
|
||||
|
||||
PACKAGE='openssh-server'
|
||||
FILE='/etc/ssh/sshd_config'
|
||||
OPTIONS='AllowAgentForwarding=no AllowTcpForwarding=no AllowStreamLocalForwarding=no PermitTunnel=no PermitUserRC=no GatewayPorts=no'
|
||||
|
||||
# This function will be called if the script status is on enabled / audit mode
|
||||
audit () {
|
||||
is_pkg_installed $PACKAGE
|
||||
if [ "$FNRET" != 0 ]; then
|
||||
crit "$PACKAGE is not installed!"
|
||||
else
|
||||
ok "$PACKAGE is installed"
|
||||
for SSH_OPTION in $OPTIONS; do
|
||||
SSH_PARAM=$(echo "$SSH_OPTION" | cut -d= -f 1)
|
||||
SSH_VALUE=$(echo "$SSH_OPTION" | cut -d= -f 2)
|
||||
PATTERN="^$SSH_PARAM[[:space:]]*$SSH_VALUE"
|
||||
does_pattern_exist_in_file_nocase $FILE "$PATTERN"
|
||||
if [ "$FNRET" = 0 ]; then
|
||||
ok "$PATTERN is present in $FILE"
|
||||
else
|
||||
crit "$PATTERN is not present in $FILE"
|
||||
fi
|
||||
done
|
||||
fi
|
||||
}
|
||||
|
||||
# This function will be called if the script status is on enabled mode
|
||||
apply () {
|
||||
is_pkg_installed $PACKAGE
|
||||
if [ "$FNRET" = 0 ]; then
|
||||
ok "$PACKAGE is installed"
|
||||
else
|
||||
crit "$PACKAGE is absent, installing it"
|
||||
apt_install $PACKAGE
|
||||
fi
|
||||
for SSH_OPTION in $OPTIONS; do
|
||||
SSH_PARAM=$(echo "$SSH_OPTION" | cut -d= -f 1)
|
||||
SSH_VALUE=$(echo "$SSH_OPTION" | cut -d= -f 2)
|
||||
PATTERN="^$SSH_PARAM[[:space:]]*$SSH_VALUE"
|
||||
does_pattern_exist_in_file_nocase $FILE "$PATTERN"
|
||||
if [ "$FNRET" = 0 ]; then
|
||||
ok "$PATTERN is present in $FILE"
|
||||
else
|
||||
warn "$PATTERN is not present in $FILE, adding it"
|
||||
does_pattern_exist_in_file_nocase $FILE "^$SSH_PARAM"
|
||||
if [ "$FNRET" != 0 ]; then
|
||||
add_end_of_file $FILE "$SSH_PARAM $SSH_VALUE"
|
||||
else
|
||||
info "Parameter $SSH_PARAM is present but with the wrong value -- Fixing"
|
||||
replace_in_file $FILE "^$SSH_PARAM[[:space:]]*.*" "$SSH_PARAM $SSH_VALUE"
|
||||
fi
|
||||
/etc/init.d/ssh reload > /dev/null 2>&1
|
||||
fi
|
||||
done
|
||||
|
||||
}
|
||||
|
||||
# This function will check config parameters required
|
||||
check_config() {
|
||||
:
|
||||
}
|
||||
|
||||
# Source Root Dir Parameter
|
||||
if [ -r /etc/default/cis-hardening ]; then
|
||||
. /etc/default/cis-hardening
|
||||
fi
|
||||
if [ -z "$CIS_ROOT_DIR" ]; then
|
||||
echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
|
||||
echo "Cannot source CIS_ROOT_DIR variable, aborting."
|
||||
exit 128
|
||||
fi
|
||||
|
||||
# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
|
||||
if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
|
||||
# shellcheck source=/opt/debian-cis/lib/main.sh
|
||||
. "$CIS_ROOT_DIR"/lib/main.sh
|
||||
else
|
||||
echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
|
||||
exit 128
|
||||
fi
|
||||
174
bin/hardening/99.5.4_ssh_keys_from.sh
Executable file
174
bin/hardening/99.5.4_ssh_keys_from.sh
Executable file
@ -0,0 +1,174 @@
|
||||
#!/bin/bash
|
||||
# run-shellcheck
|
||||
|
||||
#
|
||||
# OVH Security audit
|
||||
#
|
||||
|
||||
#
|
||||
# Check <from> field in ssh authorized keys files for users with login shell, and bastions IP if available.
|
||||
#
|
||||
|
||||
set -e # One error, it is over
|
||||
set -u # One variable unset, it is over
|
||||
|
||||
# shellcheck disable=2034
|
||||
DESCRIPTION="Check <from> field in ssh authorized keys files for users with login shell, and allowed IP if available."
|
||||
|
||||
# Regex looking for empty, hash starting lines, or 'from="127.127.127,127.127.127" ssh'
|
||||
# shellcheck disable=2089
|
||||
REGEX="^(from=(?:'|\")(,?(\d{1,3}(\.\d{1,3}){3}))+(?:'|\")\s+ssh|#|$)"
|
||||
AUTHKEYFILE_PATTERN=""
|
||||
AUTHKEYFILE_PATTERN_DEFAULT=".ssh/authorized_keys .ssh/authorized_keys2"
|
||||
|
||||
ALLOWED_IPS=""
|
||||
|
||||
ALLOWED_NOLOGIN_SHELLS="/bin/false /usr/sbin/nologin"
|
||||
|
||||
# Check functions
|
||||
check_ip() {
|
||||
file=$1
|
||||
if [ -z "$ALLOWED_IPS" ]; then
|
||||
warn "No allowed IPs to treat";
|
||||
return ;
|
||||
fi
|
||||
for line in $($SUDO_CMD grep -ne "from" "$file" | tr -s " " | sed 's/ /_/g' ); do
|
||||
linum=$(echo "$line" | cut -d ':' -f 1)
|
||||
ips=$(echo "$line" | cut -d '"' -f 2 | tr ',' ' ')
|
||||
ok_ips_allowed=""
|
||||
bad_ips=""
|
||||
for ip in $ips; do
|
||||
ip_escaped=$(sed 's/\./\\./g' <<< "$ip")
|
||||
if grep -qw "$ip_escaped" <<< $ALLOWED_IPS ; then
|
||||
debug "Line $linum of $file allows access from exused IP (${ip})."
|
||||
ok_ips_allowed+="$ip "
|
||||
else
|
||||
debug "Line $linum of $file allows access from ip ($ip) that is not allowed."
|
||||
bad_ips+="$ip "
|
||||
fi
|
||||
done
|
||||
ok_ips=$( sed 's/ $//' <<< "${ok_ips_allowed}")
|
||||
bad_ips=$( sed 's/ $//' <<< "${bad_ips}")
|
||||
if [[ -z $bad_ips ]]; then
|
||||
if [[ ! -z $ok_ips ]]; then
|
||||
ok "Line $linum of $file allows ssh access only from allowed IPs ($ok_ips)."
|
||||
fi
|
||||
else
|
||||
crit "Line $linum of $file allows ssh access from (${bad_ips}) that are not allowed."
|
||||
if [[ ! -z $ok_ips ]]; then
|
||||
ok "Line $linum of $file allows ssh access from at least allowed IPs ($ok_ips)."
|
||||
fi
|
||||
fi
|
||||
done
|
||||
}
|
||||
|
||||
check_file() {
|
||||
file=$1
|
||||
if $SUDO_CMD [ ! -e "$file" ]; then debug "$file does not exist"; return; fi
|
||||
if $SUDO_CMD [ -r "$file" ]; then
|
||||
debug "Treating $file"
|
||||
FOUND_AUTHKF=1
|
||||
if $SUDO_CMD grep -vqP "$REGEX" "${file}" ; then
|
||||
bad_lines="$(grep -vnP "$REGEX" "${file}" | cut -d ':' -f 1 | tr '\n' ' ' | sed 's/ $//' )"
|
||||
crit "There are anywhere access keys in ${file} at lines (${bad_lines})."
|
||||
else
|
||||
ok "File ${file} is cleared from anywhere access keys."
|
||||
check_ip "$file"
|
||||
fi
|
||||
else
|
||||
crit "Cannot read ${file} for ${user}."
|
||||
fi
|
||||
}
|
||||
|
||||
check_dir() {
|
||||
directory=$1
|
||||
if $SUDO_CMD [ ! -x "$directory" ]; then
|
||||
crit "Cannot read ${directory}."
|
||||
return
|
||||
fi
|
||||
for file in $AUTHKEYFILE_PATTERN; do
|
||||
check_file "${directory}"/${file}
|
||||
done
|
||||
}
|
||||
|
||||
# This function will be called if the script status is on enabled / audit mode
|
||||
audit () {
|
||||
# Retrieve authorized_key file pattern from sshd_config
|
||||
if $SUDO_CMD [ ! -r /etc/ssh/sshd_config ]; then
|
||||
crit "/etc/ssh/sshd_config is not readable."
|
||||
else
|
||||
ret=$($SUDO_CMD grep -iP "^AuthorizedKeysFile" /etc/ssh/sshd_config || echo '#KO' )
|
||||
if [ "x$ret" = "x#KO" ]; then
|
||||
debug "No AuthorizedKeysFile defined in sshd_config."
|
||||
else
|
||||
AUTHKEYFILE_PATTERN=$(echo "$ret" | sed 's/AuthorizedKeysFile//i' | sed 's#%h/##' | tr -s "[:space:]")
|
||||
debug "Found pattern in sshdconfig : ${AUTHKEYFILE_PATTERN}."
|
||||
fi
|
||||
fi
|
||||
|
||||
if [ -z "$AUTHKEYFILE_PATTERN" ] ; then
|
||||
AUTHKEYFILE_PATTERN=$AUTHKEYFILE_PATTERN_DEFAULT
|
||||
debug "Set default pattern for authorized_keys file."
|
||||
fi
|
||||
|
||||
for line in $($SUDO_CMD cat /etc/passwd | cut -d ":" -f 1,7); do
|
||||
# Checking if at least one AuthKeyFile has been found for this user
|
||||
FOUND_AUTHKF=0
|
||||
user=$(echo "$line" | cut -d ":" -f 1);
|
||||
shell=$(echo "$line" | cut -d ':' -f 2);
|
||||
if grep -q "$shell" <<< "$ALLOWED_NOLOGIN_SHELLS" ; then
|
||||
continue
|
||||
else
|
||||
info "User $user has a valid shell.";
|
||||
if [ "x$user" = "xroot" ]; then
|
||||
check_dir /root
|
||||
continue
|
||||
elif $SUDO_CMD [ ! -d /home/"$user" ]; then
|
||||
info "User $user has no home directory."
|
||||
continue
|
||||
fi
|
||||
check_dir /home/"${user}"
|
||||
if [ $FOUND_AUTHKF = 0 ]; then
|
||||
warn "$user has a valid shell but no authorized_keys file"
|
||||
fi
|
||||
fi
|
||||
|
||||
done
|
||||
}
|
||||
|
||||
# This function will be called if the script status is on enabled mode
|
||||
apply () {
|
||||
:
|
||||
}
|
||||
|
||||
create_config() {
|
||||
cat <<EOF
|
||||
status=disabled
|
||||
# Put authorized IPs you want to allow in "from" field of authorized_keys
|
||||
ALLOWED_IPS=""
|
||||
EOF
|
||||
}
|
||||
|
||||
# This function will check config parameters required
|
||||
check_config() {
|
||||
:
|
||||
}
|
||||
|
||||
# Source Root Dir Parameter
|
||||
if [ -r /etc/default/cis-hardening ]; then
|
||||
. /etc/default/cis-hardening
|
||||
fi
|
||||
if [ -z "$CIS_ROOT_DIR" ]; then
|
||||
echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
|
||||
echo "Cannot source CIS_ROOT_DIR variable, aborting."
|
||||
exit 128
|
||||
fi
|
||||
|
||||
# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
|
||||
if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
|
||||
# shellcheck source=/opt/debian-cis/lib/main.sh
|
||||
. "$CIS_ROOT_DIR"/lib/main.sh
|
||||
else
|
||||
echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
|
||||
exit 128
|
||||
fi
|
||||
96
bin/hardening/99.5.5_ssh_strict_modes.sh
Executable file
96
bin/hardening/99.5.5_ssh_strict_modes.sh
Executable file
@ -0,0 +1,96 @@
|
||||
#!/bin/bash
|
||||
# run-shellcheck
|
||||
|
||||
#
|
||||
# OVH Security audit
|
||||
#
|
||||
|
||||
#
|
||||
# Ensure home directory and ssh sensitive files are verified (not publicly readable) before connecting.
|
||||
#
|
||||
|
||||
set -e # One error, it's over
|
||||
set -u # One variable unset, it's over
|
||||
|
||||
# shellcheck disable=2034
|
||||
DESCRIPTION="Ensure home directory and ssh sensitive files are verified (not publicly readable) before connecting."
|
||||
|
||||
PACKAGE='openssh-server'
|
||||
OPTIONS='StrictModes=yes'
|
||||
FILE='/etc/ssh/sshd_config'
|
||||
|
||||
# This function will be called if the script status is on enabled / audit mode
|
||||
audit () {
|
||||
is_pkg_installed $PACKAGE
|
||||
if [ "$FNRET" != 0 ]; then
|
||||
crit "$PACKAGE is not installed!"
|
||||
else
|
||||
ok "$PACKAGE is installed"
|
||||
for SSH_OPTION in $OPTIONS; do
|
||||
SSH_PARAM=$(echo $SSH_OPTION | cut -d= -f 1)
|
||||
SSH_VALUE=$(echo $SSH_OPTION | cut -d= -f 2)
|
||||
PATTERN="^$SSH_PARAM[[:space:]]*$SSH_VALUE"
|
||||
does_pattern_exist_in_file_nocase $FILE "$PATTERN"
|
||||
if [ "$FNRET" = 0 ]; then
|
||||
ok "$PATTERN is present in $FILE"
|
||||
else
|
||||
crit "$PATTERN is not present in $FILE"
|
||||
fi
|
||||
done
|
||||
fi
|
||||
}
|
||||
|
||||
# This function will be called if the script status is on enabled mode
|
||||
apply () {
|
||||
is_pkg_installed $PACKAGE
|
||||
if [ "$FNRET" = 0 ]; then
|
||||
ok "$PACKAGE is installed"
|
||||
else
|
||||
crit "$PACKAGE is absent, installing it"
|
||||
apt_install $PACKAGE
|
||||
fi
|
||||
for SSH_OPTION in $OPTIONS; do
|
||||
SSH_PARAM=$(echo $SSH_OPTION | cut -d= -f 1)
|
||||
SSH_VALUE=$(echo $SSH_OPTION | cut -d= -f 2)
|
||||
PATTERN="^$SSH_PARAM[[:space:]]*$SSH_VALUE"
|
||||
does_pattern_exist_in_file_nocase $FILE "$PATTERN"
|
||||
if [ "$FNRET" = 0 ]; then
|
||||
ok "$PATTERN is present in $FILE"
|
||||
else
|
||||
warn "$PATTERN is not present in $FILE, adding it"
|
||||
does_pattern_exist_in_file_nocase $FILE "^$SSH_PARAM"
|
||||
if [ "$FNRET" != 0 ]; then
|
||||
add_end_of_file $FILE "$SSH_PARAM $SSH_VALUE"
|
||||
else
|
||||
info "Parameter $SSH_PARAM is present but with the wrong value -- Fixing"
|
||||
replace_in_file $FILE "^$SSH_PARAM[[:space:]]*.*" "$SSH_PARAM $SSH_VALUE"
|
||||
fi
|
||||
/etc/init.d/ssh reload > /dev/null 2>&1
|
||||
fi
|
||||
done
|
||||
|
||||
}
|
||||
|
||||
# This function will check config parameters required
|
||||
check_config() {
|
||||
:
|
||||
}
|
||||
|
||||
# Source Root Dir Parameter
|
||||
if [ -r /etc/default/cis-hardening ]; then
|
||||
. /etc/default/cis-hardening
|
||||
fi
|
||||
if [ -z "$CIS_ROOT_DIR" ]; then
|
||||
echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
|
||||
echo "Cannot source CIS_ROOT_DIR variable, aborting."
|
||||
exit 128
|
||||
fi
|
||||
|
||||
# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
|
||||
if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
|
||||
# shellcheck source=/opt/debian-cis/lib/main.sh
|
||||
. "$CIS_ROOT_DIR"/lib/main.sh
|
||||
else
|
||||
echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
|
||||
exit 128
|
||||
fi
|
||||
88
bin/hardening/99.5.6_ssh_sys_accept_env.sh
Executable file
88
bin/hardening/99.5.6_ssh_sys_accept_env.sh
Executable file
@ -0,0 +1,88 @@
|
||||
#!/bin/bash
|
||||
# run-shellcheck
|
||||
|
||||
#
|
||||
# CIS Debian 7/8 Hardening
|
||||
#
|
||||
|
||||
#
|
||||
# 9Restrict which user's variables are accepted by ssh daemon
|
||||
#
|
||||
|
||||
set -e # One error, it's over
|
||||
set -u # One variable unset, it's over
|
||||
|
||||
# shellcheck disable=2034
|
||||
HARDENING_LEVEL=2
|
||||
# shellcheck disable=2034
|
||||
DESCRIPTION="Restrict which user's variables are accepted by ssh daemon"
|
||||
|
||||
PACKAGE='openssh-server'
|
||||
PATTERN='^\s*AcceptEnv\s+LANG LC_\*'
|
||||
FILE='/etc/ssh/sshd_config'
|
||||
|
||||
# This function will be called if the script status is on enabled / audit mode
|
||||
audit () {
|
||||
is_pkg_installed $PACKAGE
|
||||
if [ "$FNRET" != 0 ]; then
|
||||
crit "$PACKAGE is not installed!"
|
||||
else
|
||||
ok "$PACKAGE is installed"
|
||||
does_pattern_exist_in_file_nocase $FILE "$PATTERN"
|
||||
if [ "$FNRET" = 0 ]; then
|
||||
ok "$PATTERN is present in $FILE"
|
||||
else
|
||||
crit "$PATTERN is not present in $FILE"
|
||||
fi
|
||||
fi
|
||||
}
|
||||
|
||||
# This function will be called if the script status is on enabled mode
|
||||
apply () {
|
||||
is_pkg_installed $PACKAGE
|
||||
if [ "$FNRET" = 0 ]; then
|
||||
ok "$PACKAGE is installed"
|
||||
else
|
||||
crit "$PACKAGE is absent, installing it"
|
||||
apt_install $PACKAGE
|
||||
fi
|
||||
does_pattern_exist_in_file_nocase $FILE "$PATTERN"
|
||||
if [ "$FNRET" = 0 ]; then
|
||||
ok "$PATTERN is present in $FILE"
|
||||
else
|
||||
warn "$PATTERN is not present in $FILE, adding it"
|
||||
does_pattern_exist_in_file_nocase $FILE "^$PATTERN"
|
||||
PATTERN=$( sed 's/\^//' <<< "$PATTERN" | sed -r 's/\\s\*//' | sed -r 's/\\s\+/ /g' | sed 's/\\//g')
|
||||
if [ "$FNRET" != 0 ]; then
|
||||
add_end_of_file $FILE "$PATTERN"
|
||||
else
|
||||
info "Parameter $SSH_PARAM is present but with the wrong value -- Fixing"
|
||||
replace_in_file $FILE "^$SSH_PARAM[[:space:]]*.*" "$PATTERN"
|
||||
fi
|
||||
/etc/init.d/ssh reload > /dev/null 2>&1
|
||||
fi
|
||||
}
|
||||
|
||||
# This function will check config parameters required
|
||||
check_config() {
|
||||
:
|
||||
}
|
||||
|
||||
# Source Root Dir Parameter
|
||||
if [ -r /etc/default/cis-hardening ]; then
|
||||
. /etc/default/cis-hardening
|
||||
fi
|
||||
if [ -z "$CIS_ROOT_DIR" ]; then
|
||||
echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
|
||||
echo "Cannot source CIS_ROOT_DIR variable, aborting."
|
||||
exit 128
|
||||
fi
|
||||
|
||||
# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
|
||||
if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
|
||||
# shellcheck source=/opt/debian-cis/lib/main.sh
|
||||
. "$CIS_ROOT_DIR"/lib/main.sh
|
||||
else
|
||||
echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
|
||||
exit 128
|
||||
fi
|
||||
66
bin/hardening/99.5.7_ssh_sys_no_legacy.sh
Executable file
66
bin/hardening/99.5.7_ssh_sys_no_legacy.sh
Executable file
@ -0,0 +1,66 @@
|
||||
#!/bin/bash
|
||||
# run-shellcheck
|
||||
|
||||
# CIS Debian 7 Hardening
|
||||
#
|
||||
|
||||
#
|
||||
# Ensure that legacy services rlogin, rlogind and rcp are disabled and not installed
|
||||
#
|
||||
set -e # One error, it's over
|
||||
set -u # One variable unset, it's over
|
||||
|
||||
# shellcheck disable=2034
|
||||
DESCRIPTION="Ensure that legacy services rlogin, rlogind and rcp are disabled and not installed"
|
||||
# shellcheck disable=2034
|
||||
SERVICES="rlogin rlogind rcp"
|
||||
|
||||
# This function will be called if the script status is on enabled / audit mode
|
||||
audit () {
|
||||
for SERVICE in $SERVICES
|
||||
do
|
||||
info "Checking if $SERVICE is enabled and installed"
|
||||
is_service_enabled "$SERVICE"
|
||||
if [ "$FNRET" != 0 ]; then
|
||||
ok "$SERVICE is disabled"
|
||||
else
|
||||
crit "$SERVICE is enabled"
|
||||
fi
|
||||
is_pkg_installed "$SERVICE"
|
||||
if [ "$FNRET" != 0 ]; then
|
||||
ok "$SERVICE is not installed"
|
||||
else
|
||||
warn "$SERVICE is installed"
|
||||
fi
|
||||
done
|
||||
}
|
||||
|
||||
# This function will be called if the script status is on enabled mode
|
||||
apply () {
|
||||
:
|
||||
}
|
||||
|
||||
|
||||
# This function will check config parameters required
|
||||
check_config() {
|
||||
:
|
||||
}
|
||||
|
||||
# Source Root Dir Parameter
|
||||
if [ -r /etc/default/cis-hardening ]; then
|
||||
. /etc/default/cis-hardening
|
||||
fi
|
||||
if [ -z "$CIS_ROOT_DIR" ]; then
|
||||
echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment, cannot source CIS_ROOT_DIR variable, aborting"
|
||||
exit 128
|
||||
fi
|
||||
|
||||
|
||||
# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
|
||||
if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
|
||||
# shellcheck source=/opt/debian-cis/lib/main.sh
|
||||
. "$CIS_ROOT_DIR"/lib/main.sh
|
||||
else
|
||||
echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
|
||||
exit 128
|
||||
fi
|
||||
98
bin/hardening/99.5.8_ssh_sys_sandbox.sh
Executable file
98
bin/hardening/99.5.8_ssh_sys_sandbox.sh
Executable file
@ -0,0 +1,98 @@
|
||||
#!/bin/bash
|
||||
# run-shellcheck
|
||||
|
||||
#
|
||||
# CIS Debian 7/8 Hardening
|
||||
#
|
||||
|
||||
#
|
||||
# Check UsePrivilegeSeparation set to sandbox.
|
||||
#
|
||||
|
||||
set -e # One error, it's over
|
||||
set -u # One variable unset, it's over
|
||||
|
||||
# shellcheck disable=2034
|
||||
HARDENING_LEVEL=2
|
||||
# shellcheck disable=2034
|
||||
DESCRIPTION="Check UsePrivilegeSeparation set to sandbox."
|
||||
|
||||
PACKAGE='openssh-server'
|
||||
OPTIONS='UsePrivilegeSeparation=sandbox'
|
||||
FILE='/etc/ssh/sshd_config'
|
||||
|
||||
# This function will be called if the script status is on enabled / audit mode
|
||||
audit () {
|
||||
is_pkg_installed $PACKAGE
|
||||
if [ "$FNRET" != 0 ]; then
|
||||
crit "$PACKAGE is not installed!"
|
||||
else
|
||||
ok "$PACKAGE is installed"
|
||||
for SSH_OPTION in $OPTIONS; do
|
||||
SSH_PARAM=$(echo $SSH_OPTION | cut -d= -f 1)
|
||||
SSH_VALUE=$(echo $SSH_OPTION | cut -d= -f 2)
|
||||
PATTERN="^$SSH_PARAM[[:space:]]*$SSH_VALUE"
|
||||
does_pattern_exist_in_file_nocase $FILE "$PATTERN"
|
||||
if [ "$FNRET" = 0 ]; then
|
||||
ok "$PATTERN is present in $FILE"
|
||||
else
|
||||
crit "$PATTERN is not present in $FILE"
|
||||
fi
|
||||
done
|
||||
fi
|
||||
}
|
||||
|
||||
|
||||
# This function will be called if the script status is on enabled mode
|
||||
apply () {
|
||||
is_pkg_installed $PACKAGE
|
||||
if [ "$FNRET" = 0 ]; then
|
||||
ok "$PACKAGE is installed"
|
||||
else
|
||||
crit "$PACKAGE is absent, installing it"
|
||||
apt_install $PACKAGE
|
||||
fi
|
||||
for SSH_OPTION in $OPTIONS; do
|
||||
SSH_PARAM=$(echo $SSH_OPTION | cut -d= -f 1)
|
||||
SSH_VALUE=$(echo $SSH_OPTION | cut -d= -f 2)
|
||||
PATTERN="^$SSH_PARAM[[:space:]]*$SSH_VALUE"
|
||||
does_pattern_exist_in_file_nocase $FILE "$PATTERN"
|
||||
if [ "$FNRET" = 0 ]; then
|
||||
ok "$PATTERN is present in $FILE"
|
||||
else
|
||||
warn "$PATTERN is not present in $FILE, adding it"
|
||||
does_pattern_exist_in_file_nocase $FILE "^$SSH_PARAM"
|
||||
if [ "$FNRET" != 0 ]; then
|
||||
add_end_of_file $FILE "$SSH_PARAM $SSH_VALUE"
|
||||
else
|
||||
info "Parameter $SSH_PARAM is present but with the wrong value -- Fixing"
|
||||
replace_in_file $FILE "^$SSH_PARAM[[:space:]]*.*" "$SSH_PARAM $SSH_VALUE"
|
||||
fi
|
||||
/etc/init.d/ssh reload > /dev/null 2>&1
|
||||
fi
|
||||
done
|
||||
}
|
||||
|
||||
# This function will check config parameters required
|
||||
check_config() {
|
||||
:
|
||||
}
|
||||
|
||||
# Source Root Dir Parameter
|
||||
if [ -r /etc/default/cis-hardening ]; then
|
||||
. /etc/default/cis-hardening
|
||||
fi
|
||||
if [ -z "$CIS_ROOT_DIR" ]; then
|
||||
echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
|
||||
echo "Cannot source CIS_ROOT_DIR variable, aborting."
|
||||
exit 128
|
||||
fi
|
||||
|
||||
# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
|
||||
if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
|
||||
# shellcheck source=/opt/debian-cis/lib/main.sh
|
||||
. "$CIS_ROOT_DIR"/lib/main.sh
|
||||
else
|
||||
echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
|
||||
exit 128
|
||||
fi
|
||||
97
bin/hardening/99.5.9_ssh_loglevel.sh
Executable file
97
bin/hardening/99.5.9_ssh_loglevel.sh
Executable file
@ -0,0 +1,97 @@
|
||||
#!/bin/bash
|
||||
# run-shellcheck
|
||||
|
||||
#
|
||||
# CIS Debian 7/8 Hardening
|
||||
#
|
||||
|
||||
#
|
||||
# SSH log level is set to VERBOSE
|
||||
#
|
||||
|
||||
set -e # One error, it's over
|
||||
set -u # One variable unset, it's over
|
||||
|
||||
# shellcheck disable=2034
|
||||
DESCRIPTION="SSH log level is set to VERBOSE"
|
||||
# shellcheck disable=2034
|
||||
HARDENING_LEVEL=2
|
||||
|
||||
PACKAGE='openssh-server'
|
||||
OPTIONS='LogLevel=VERBOSE'
|
||||
FILE='/etc/ssh/sshd_config'
|
||||
|
||||
# This function will be called if the script status is on enabled / audit mode
|
||||
audit () {
|
||||
is_pkg_installed $PACKAGE
|
||||
if [ "$FNRET" != 0 ]; then
|
||||
crit "$PACKAGE is not installed!"
|
||||
else
|
||||
ok "$PACKAGE is installed"
|
||||
for SSH_OPTION in $OPTIONS; do
|
||||
SSH_PARAM=$(echo $SSH_OPTION | cut -d= -f 1)
|
||||
SSH_VALUE=$(echo $SSH_OPTION | cut -d= -f 2)
|
||||
PATTERN="^$SSH_PARAM[[:space:]]*$SSH_VALUE"
|
||||
does_pattern_exist_in_file_nocase $FILE "$PATTERN"
|
||||
if [ "$FNRET" = 0 ]; then
|
||||
ok "$PATTERN is present in $FILE"
|
||||
else
|
||||
crit "$PATTERN is not present in $FILE"
|
||||
fi
|
||||
done
|
||||
fi
|
||||
}
|
||||
|
||||
# This function will be called if the script status is on enabled mode
|
||||
apply () {
|
||||
is_pkg_installed $PACKAGE
|
||||
if [ "$FNRET" = 0 ]; then
|
||||
ok "$PACKAGE is installed"
|
||||
else
|
||||
crit "$PACKAGE is absent, installing it"
|
||||
apt_install $PACKAGE
|
||||
fi
|
||||
for SSH_OPTION in $OPTIONS; do
|
||||
SSH_PARAM=$(echo $SSH_OPTION | cut -d= -f 1)
|
||||
SSH_VALUE=$(echo $SSH_OPTION | cut -d= -f 2)
|
||||
PATTERN="^$SSH_PARAM[[:space:]]*$SSH_VALUE"
|
||||
does_pattern_exist_in_file_nocase $FILE "$PATTERN"
|
||||
if [ "$FNRET" = 0 ]; then
|
||||
ok "$PATTERN is present in $FILE"
|
||||
else
|
||||
warn "$PATTERN is not present in $FILE, adding it"
|
||||
does_pattern_exist_in_file_nocase $FILE "^$SSH_PARAM"
|
||||
if [ "$FNRET" != 0 ]; then
|
||||
add_end_of_file $FILE "$SSH_PARAM $SSH_VALUE"
|
||||
else
|
||||
info "Parameter $SSH_PARAM is present but with the wrong value -- Fixing"
|
||||
replace_in_file $FILE "^$SSH_PARAM[[:space:]]*.*" "$SSH_PARAM $SSH_VALUE"
|
||||
fi
|
||||
/etc/init.d/ssh reload > /dev/null 2>&1
|
||||
fi
|
||||
done
|
||||
}
|
||||
|
||||
# This function will check config parameters required
|
||||
check_config() {
|
||||
:
|
||||
}
|
||||
|
||||
# Source Root Dir Parameter
|
||||
if [ -r /etc/default/cis-hardening ]; then
|
||||
. /etc/default/cis-hardening
|
||||
fi
|
||||
if [ -z "$CIS_ROOT_DIR" ]; then
|
||||
echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
|
||||
echo "Cannot source CIS_ROOT_DIR variable, aborting."
|
||||
exit 128
|
||||
fi
|
||||
|
||||
# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
|
||||
if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
|
||||
# shellcheck source=/opt/debian-cis/lib/main.sh
|
||||
. "$CIS_ROOT_DIR"/lib/main.sh
|
||||
else
|
||||
echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
|
||||
exit 128
|
||||
fi
|
||||
Reference in New Issue
Block a user