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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>
104 lines
3.5 KiB
Bash
Executable File
104 lines
3.5 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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# Audit SGID executables (Not 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="Find SGID system executables."
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IGNORED_PATH=''
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# find emits following error if directory or file disappear during
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# tree traversal: find: ‘/tmp/xxx’: No such file or directory
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FIND_IGNORE_NOSUCHFILE_ERR=false
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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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info "Checking if there are sgid files"
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if [ -n "$IGNORED_PATH" ]; then
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# maybe IGNORED_PATH allow us to filter out some FS
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FS_NAMES=$(df --local -P | awk '{if (NR!=1) print $6}' | grep -vE "$IGNORED_PATH")
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[ "${FIND_IGNORE_NOSUCHFILE_ERR}" = true ] && set +e
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# shellcheck disable=2086
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FOUND_BINARIES=$($SUDO_CMD find $FS_NAMES -xdev -ignore_readdir_race -type f -perm -2000 -regextype 'egrep' ! -regex $IGNORED_PATH -print)
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[ "${FIND_IGNORE_NOSUCHFILE_ERR}" = true ] && set -e
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else
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FS_NAMES=$(df --local -P | awk '{if (NR!=1) print $6}')
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[ "${FIND_IGNORE_NOSUCHFILE_ERR}" = true ] && set +e
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# shellcheck disable=2086
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FOUND_BINARIES=$($SUDO_CMD find $FS_NAMES -xdev -ignore_readdir_race -type f -perm -2000 -print)
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[ "${FIND_IGNORE_NOSUCHFILE_ERR}" = true ] && set -e
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fi
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BAD_BINARIES=""
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for BINARY in $FOUND_BINARIES; do
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if grep -qw "$BINARY" <<<"$EXCEPTIONS"; then
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debug "$BINARY is confirmed as an exception"
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else
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BAD_BINARIES="$BAD_BINARIES $BINARY"
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fi
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done
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if [ -n "$BAD_BINARIES" ]; then
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crit "Some sgid files are present"
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# shellcheck disable=SC2001
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FORMATTED_RESULT=$(sed "s/ /\n/g" <<<"$BAD_BINARIES" | sort | uniq | tr '\n' ' ')
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crit "$FORMATTED_RESULT"
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else
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ok "No unknown sgid files found"
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fi
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}
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# This function will be called if the script status is on enabled mode
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apply() {
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info "Removing sgid on valid binary may seriously harm your system, report only here"
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}
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# This function will create the config file for this check with default values
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create_config() {
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cat <<EOF
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status=audit
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# Put here valid binaries with sgid enabled separated by spaces
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EXCEPTIONS="/sbin/unix_chkpwd /usr/sbin/unix_chkpwd /usr/bin/bsd-write /usr/bin/chage /usr/bin/crontab /usr/bin/expiry /usr/bin/mutt_dotlock /usr/bin/screen /usr/bin/ssh-agent /usr/bin/wall /usr/sbin/postdrop /usr/sbin/postqueue /usr/bin/at /usr/bin/dotlockfile /usr/bin/mail-lock /usr/bin/mail-touchlock /usr/bin/mail-unlock"
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EOF
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}
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# This function will check config parameters required
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check_config() {
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if [ -z "$EXCEPTIONS" ]; then
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EXCEPTIONS="@"
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fi
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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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