mirror of
https://github.com/ovh/debian-cis.git
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104 lines
3.2 KiB
Bash
Executable File
104 lines
3.2 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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# 1.6.4 Ensure core dumps are restricted (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="Restrict core dumps."
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LIMIT_FILE='/etc/security/limits.conf'
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LIMIT_DIR='/etc/security/limits.d'
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LIMIT_PATTERN='^\*[[:space:]]*hard[[:space:]]*core[[:space:]]*0$'
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SYSCTL_PARAM='fs.suid_dumpable'
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SYSCTL_EXP_RESULT=0
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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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SEARCH_RES=0
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LIMIT_FILES=""
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if $SUDO_CMD [ -d "$LIMIT_DIR" ]; then
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for file in $($SUDO_CMD ls "$LIMIT_DIR"/*.conf 2>/dev/null); do
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LIMIT_FILES="$LIMIT_FILES $file"
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done
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fi
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debug "Files to search $LIMIT_FILE $LIMIT_FILES"
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for file in $LIMIT_FILE $LIMIT_FILES; do
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does_pattern_exist_in_file "$file" "$LIMIT_PATTERN"
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if [ "$FNRET" != 0 ]; then
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debug "$LIMIT_PATTERN not present in $file"
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else
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ok "$LIMIT_PATTERN present in $file"
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SEARCH_RES=1
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break
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fi
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done
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if [ "$SEARCH_RES" = 0 ]; then
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crit "$LIMIT_PATTERN is not present in $LIMIT_FILE $LIMIT_FILES"
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fi
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has_sysctl_param_expected_result "$SYSCTL_PARAM" "$SYSCTL_EXP_RESULT"
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if [ "$FNRET" != 0 ]; then
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crit "$SYSCTL_PARAM was not set to $SYSCTL_EXP_RESULT"
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elif [ "$FNRET" = 255 ]; then
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warn "$SYSCTL_PARAM does not exist -- Typo?"
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else
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ok "$SYSCTL_PARAM correctly set to $SYSCTL_EXP_RESULT"
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fi
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}
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# This function will be called if the script status is on enabled mode
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apply() {
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does_pattern_exist_in_file "$LIMIT_FILE" "$LIMIT_PATTERN"
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if [ "$FNRET" != 0 ]; then
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warn "$LIMIT_PATTERN not present in $LIMIT_FILE, adding at the end of $LIMIT_FILE"
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add_end_of_file $LIMIT_FILE "* hard core 0"
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else
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ok "$LIMIT_PATTERN present in $LIMIT_FILE"
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fi
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has_sysctl_param_expected_result "$SYSCTL_PARAM" "$SYSCTL_EXP_RESULT"
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if [ "$FNRET" != 0 ]; then
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warn "$SYSCTL_PARAM was not set to $SYSCTL_EXP_RESULT -- Fixing"
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set_sysctl_param "$SYSCTL_PARAM" "$SYSCTL_EXP_RESULT"
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elif [ "$FNRET" = 255 ]; then
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warn "$SYSCTL_PARAM does not exist -- Typo?"
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else
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ok "$SYSCTL_PARAM correctly set to $SYSCTL_EXP_RESULT"
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fi
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}
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# This function will check config parameters required
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check_config() {
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:
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}
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# Source Root Dir Parameter
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if [ -r /etc/default/cis-hardening ]; then
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# shellcheck source=../../debian/default
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. /etc/default/cis-hardening
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fi
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if [ -z "$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 "$CIS_ROOT_DIR"/lib/main.sh ]; then
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# shellcheck source=../../lib/main.sh
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. "$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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