mirror of
https://github.com/ovh/debian-cis.git
synced 2024-11-22 21:47:02 +01:00
82 lines
2.7 KiB
Bash
Executable File
82 lines
2.7 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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# 3.2.4 Ensure suspicious packets are logged (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="Log suspicious packets, like spoofed packets."
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SYSCTL_PARAMS='net.ipv4.conf.all.log_martians=1 net.ipv4.conf.default.log_martians=1'
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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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for SYSCTL_VALUES in $SYSCTL_PARAMS; do
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SYSCTL_PARAM=$(echo $SYSCTL_VALUES | cut -d= -f 1)
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SYSCTL_EXP_RESULT=$(echo $SYSCTL_VALUES | cut -d= -f 2)
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debug "$SYSCTL_PARAM should be set to $SYSCTL_EXP_RESULT"
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has_sysctl_param_expected_result "$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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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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for SYSCTL_VALUES in $SYSCTL_PARAMS; do
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SYSCTL_PARAM=$(echo $SYSCTL_VALUES | cut -d= -f 1)
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SYSCTL_EXP_RESULT=$(echo $SYSCTL_VALUES | cut -d= -f 2)
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debug "$SYSCTL_PARAM should be set to $SYSCTL_EXP_RESULT"
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has_sysctl_param_expected_result "$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 $SYSCTL_EXP_RESULT
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sysctl -w net.ipv4.route.flush=1 > /dev/null
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elif [ "$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 $SYSCTL_EXP_RESULT"
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fi
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done
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}
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# This function will check config parameters required
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check_config() {
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:
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}
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# Source Root Dir Parameter
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if [ -r /etc/default/cis-hardening ]; then
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# shellcheck source=../../debian/default
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. /etc/default/cis-hardening
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fi
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if [ -z "$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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