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be33848d81
* feat: add "--set-version" option This feature will allow to chose a specific cis version to run, like debian 11 or debian 12 * chore: configure current repository as a version And use it as default version. To this end, the scripts in bin/hardening have been made generic by removing the associated recommendation number. Only impact is if you are used to execute scripts directly from bin/hardening. In this case, please use the "bin/hardening.sh" wrapper as intended. I had to rename 2.3.1_disable_nis.sh to uninstall_nis.sh, as it was conflicting with 2.3.1_disable_nis.sh Also, there was a doublon between 1.1.1.8_disable_cramfs.sh and 99.1.1.1_disable_cramfs.sh ; the former was kept * chore: remove CIS recommendation numbers from bin/hardening scripts * fix: some tests are failing find_ungrouped_files.sh and find_unowned_files.sh tests can not be executed multiple times: - test repository is not cleaned - configuration is updated multiple times Those tests are also failing, because: - the sed to change the status in the configuration was also changing the test folder path. - missing /proc in EXCLUDED paths - the EXCLUDED configuration doesn't have the correct format for egrep --------- Co-authored-by: Damien Cavagnini <damien.cavagnini@corp.ovh.com>
123 lines
3.9 KiB
Bash
Executable File
123 lines
3.9 KiB
Bash
Executable File
#!/bin/bash
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# run-shellcheck
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#
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# CIS Debian Hardening
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#
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#
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# Ensure SSH MaxAuthTries is set to 4 or less (Scored)
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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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HARDENING_LEVEL=2
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# shellcheck disable=2034
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DESCRIPTION="Set SSH MaxAuthTries to 4."
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PACKAGE='openssh-server'
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OPTIONS=''
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FILE='/etc/ssh/sshd_config'
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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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is_pkg_installed "$PACKAGE"
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if [ "$FNRET" != 0 ]; then
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ok "$PACKAGE is not installed!"
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else
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ok "$PACKAGE is installed"
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for SSH_OPTION in $OPTIONS; do
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SSH_PARAM=$(echo "$SSH_OPTION" | cut -d= -f 1)
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SSH_VALUE=$(echo "$SSH_OPTION" | cut -d= -f 2)
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PATTERN="^${SSH_PARAM}[[:space:]]*$SSH_VALUE"
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does_pattern_exist_in_file_nocase "$FILE" "$PATTERN"
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if [ "$FNRET" = 0 ]; then
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ok "$PATTERN is present in $FILE"
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else
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does_pattern_exist_in_file_nocase "$FILE" "^${SSH_PARAM}"
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if [ "$FNRET" != 0 ]; then
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crit "$PATTERN is not present in $FILE"
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else
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VALUE=$($SUDO_CMD grep -i "^${SSH_PARAM}" "$FILE" | tr -s ' ' | cut -d' ' -f2)
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if [ "$VALUE" -gt "$SSH_VALUE" ]; then
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crit "$VALUE is higher than recommended $SSH_VALUE for $SSH_PARAM"
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else
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ok "$VALUE is lower than recommended $SSH_VALUE for $SSH_PARAM"
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fi
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fi
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fi
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done
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fi
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}
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# This function will be called if the script status is on enabled mode
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apply() {
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is_pkg_installed "$PACKAGE"
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if [ "$FNRET" = 0 ]; then
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ok "$PACKAGE is installed"
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else
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crit "$PACKAGE is absent, installing it"
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apt_install "$PACKAGE"
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fi
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for SSH_OPTION in $OPTIONS; do
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SSH_PARAM=$(echo "$SSH_OPTION" | cut -d= -f 1)
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SSH_VALUE=$(echo "$SSH_OPTION" | cut -d= -f 2)
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PATTERN="^${SSH_PARAM}[[:space:]]*$SSH_VALUE"
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does_pattern_exist_in_file_nocase "$FILE" "$PATTERN"
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if [ "$FNRET" = 0 ]; then
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ok "$PATTERN is present in $FILE"
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else
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warn "$PATTERN is not present in $FILE"
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does_pattern_exist_in_file_nocase "$FILE" "^${SSH_PARAM}"
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if [ "$FNRET" != 0 ]; then
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add_end_of_file "$FILE" "$SSH_PARAM $SSH_VALUE"
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else
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VALUE=$(grep -i "^${SSH_PARAM}" "$FILE" | tr -s ' ' | cut -d' ' -f2)
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if [ "$VALUE" -gt "$SSH_VALUE" ]; then
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warn "$VALUE is higher than recommended $SSH_VALUE for $SSH_PARAM, replacing it"
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replace_in_file "$FILE" "^${SSH_PARAM}[[:space:]]*.*" "$SSH_PARAM $SSH_VALUE"
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else
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ok "$VALUE is lower than recommended $SSH_VALUE for $SSH_PARAM"
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fi
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fi
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/etc/init.d/ssh reload
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fi
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done
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}
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# This function will check config parameters required
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check_config() {
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:
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}
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create_config() {
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cat <<EOF
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# shellcheck disable=2034
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status=audit
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# Put here the max auth tries for ssh
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OPTIONS='MaxAuthTries=4'
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EOF
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}
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# Source Root Dir Parameter
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if [ -r /etc/default/cis-hardening ]; then
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# shellcheck source=../../debian/default
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. /etc/default/cis-hardening
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fi
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if [ -z "$CIS_LIB_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_LIB_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 "${CIS_LIB_DIR}"/main.sh ]; then
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# shellcheck source=../../lib/main.sh
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. "${CIS_LIB_DIR}"/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_LIB_DIR in /etc/default/cis-hardening"
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exit 128
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fi
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