mirror of
https://github.com/ovh/debian-cis.git
synced 2025-08-31 11:54:07 +02:00
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
86 lines
2.5 KiB
Bash
Executable File
86 lines
2.5 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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# Ensure ufw outbound connections are configured (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 outbound connections are configured"
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UFW_RULES_FILE="/etc/ufw/user.rules"
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# variable defined in config file
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ALLOW_OUTBOUND_ALL=""
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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_RULE_IS_VALID=1
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# rules are saved in /etc/ufw/user.rules
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# easier to parse than ufw output
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if $SUDO_CMD grep "^[^#]*-[A,I].*output -o all -j ACCEPT" "$UFW_RULES_FILE" >/dev/null 2>&1; then
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if [ "$ALLOW_OUTBOUND_ALL" -eq 0 ]; then
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UFW_RULE_IS_VALID=0
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ok "ufw output is allowed for all"
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else
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crit "ufw output is allowed for all, and ALLOW_OUTBOUND_ALL=1"
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fi
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else
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if [ "$ALLOW_OUTBOUND_ALL" -eq 1 ]; then
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UFW_RULE_IS_VALID=0
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ok "ufw output is not allowed for all"
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else
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crit "ufw output is not allowed for all, and ALLOW_OUTBOUND_ALL=0"
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fi
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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 [ "$UFW_RULE_IS_VALID" -ne 0 ]; then
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info "Please review the output rules according to your site policy, and update 'ALLOW_OUTBOUND_ALL' in configuration accordingly"
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fi
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}
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create_config() {
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cat <<EOF
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# shellcheck disable=2034
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status=audit
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# ALLOW_OUTBOUND_ALL=0 means true, we want the rule to be present
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# ALLOW_OUTBOUND_ALL=1 means false, we don't want the rule to be present
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ALLOW_OUTBOUND_ALL=0
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EOF
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}
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# This function will check config parameters required
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check_config() {
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:
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}
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# Source Root Dir Parameter
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if [ -r /etc/default/cis-hardening ]; then
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# shellcheck source=../../debian/default
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. /etc/default/cis-hardening
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fi
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if [ -z "$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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