mirror of
https://github.com/ovh/debian-cis.git
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d171310d81
- nftables_loopback_is_configured.sh -> 4.2.6 - nftables_established_connections.sh -> 4.2.7 - iptables_flushed_with_nftables.sh -> 4.2.3 - ufw_loopback_is_configured.sh -> 4.1.4 - ufw_outbound_connection.sh -> 4.1.5 - ufw_default_deny.sh -> 4.1.7 - ufw_rules_them_all.sh -> 4.1.6
75 lines
2.2 KiB
Bash
Executable File
75 lines
2.2 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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# Ensure ufw firewall rules exist for all open ports (Manual)
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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="Ensure ufw firewall rules exist for all open ports"
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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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UFW_IS_VALID=0
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local ufw_ports_rules
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local listening_ports
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ufw_ports_rules=$($SUDO_CMD ufw status verbose 2>/dev/null | grep -Po '^\h*\d+\b' | sort -u)
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listening_ports=$($SUDO_CMD ss -tuln | awk '($5!~/%lo:/ && $5!~/127.0.0.1:/ && $5!~/\[?::1\]?:/) {split($5, a, ":"); print a[2]}' | sort -u)
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for port in $listening_ports; do
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if ! grep "$port" <<<"$ufw_ports_rules"; then
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crit "$port does not have an ufw rule"
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UFW_IS_VALID=1
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fi
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done
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if [ "$UFW_IS_VALID" -eq 0 ]; then
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ok "all listening ports have a corresponding rule in ufw"
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fi
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}
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# This function will be called if the script status is on enabled mode
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apply() {
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if [ "$UFW_IS_VALID" -ne 0 ]; then
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# Debian 12 CIS marks this script as "Automated", but we wont do it
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# How can we know if a rule should be allowed or denied ?
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warn "Please review the ufw rules and update them accordingly"
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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 "$CIS_LIB_DIR" ]; then
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echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
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echo "Cannot source CIS_LIB_DIR variable, aborting."
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exit 128
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fi
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# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
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if [ -r "${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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