Ensure the named_t Process Type is Not in Permissive Mode

LowLevel 2Automatedbind

Description

In addition to setting the entire SELinux configuration in permissive mode, it is possible to set individual process types (domains) such as named_t into a permissive mode as well. The permissive mode will not prevent any access or actions, instead, any actions that would have been denied are simply logged. The audit runs semodule -l and fails when the permissive_named_t module is loaded.

How it is checked

Audit method: Shell command

shell

command -v semodule >/dev/null 2>&1 || exit 1
out=$(semodule -l 2>/dev/null) || exit 1
printf '%s\n' "$out" | grep -q permissive_named_t && echo 'named_t is permissive' || echo compliant

Expected output: compliant

How it is fixed

Fix method: Guidance or infrastructure patch

Perform the following to implement the recommended state: If the named_t type is in permissive mode; the customized permissive mode should be deleted with the following semanage command. # semanage permissive -d named_t

Properties

Operating systems: Any
Tags: binddnsselinux
Reference: CIS ISC BIND DNS Server 9.11 Benchmark v1.0.0 - 10.3 Ensure the named_t Process Type is Not in Permissive Mode

Check this host

Run this on a machine you are allowed to audit. The scan is read-only.

shell

tmaegis scan --target bind --level 2