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https://github.com/ovh/debian-cis.git
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81 lines
2.3 KiB
Bash
Executable File
81 lines
2.3 KiB
Bash
Executable File
#!/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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# 3.5.1.1 Ensure default deny firewall policy (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="Check iptables firewall default policy for DROP on INPUT and FORWARD."
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PACKAGE="iptables"
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FW_CHAINS="INPUT FORWARD"
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FW_POLICY="DROP"
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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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crit "$PACKAGE is not installed!"
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else
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ipt=$($SUDO_CMD "$PACKAGE" -nL 2>/dev/null || true)
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if [[ -z "$ipt" ]]; then
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crit "Empty return from $PACKAGE command. Aborting..."
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return
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fi
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for chain in $FW_CHAINS; do
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regex="Chain $chain \(policy ([A-Z]+)\)"
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# previous line will capture actual policy
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if [[ "$ipt" =~ $regex ]]; then
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actual_policy=${BASH_REMATCH[1]}
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if [[ "$actual_policy" = "$FW_POLICY" ]]; then
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ok "Policy correctly set to $FW_POLICY for chain $chain"
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else
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crit "Policy set to $actual_policy for chain $chain, should be ${FW_POLICY}."
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fi
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else
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echo "cant find chain $chain"
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fi
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done
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fi
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}
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# This function will be called if the script status is on enabled mode
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apply() {
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:
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}
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# This function will check config parameters required
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check_config() {
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:
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}
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# Source Root Dir Parameter
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if [ -r /etc/default/cis-hardening ]; then
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# shellcheck source=../../debian/default
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. /etc/default/cis-hardening
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fi
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if [ -z "$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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