Ensure Only the Necessary SELinux Booleans are Enabled

FaibleNiveau 2Automatiséebind

Description

SELinux booleans allow or disallow specific behaviors. There are two boolean variables specific to the ISC BIND DNS server: ; named_tcp_bind_http_port - Allow named to tcp bind http port ; named_write_master_zones - Allow named to write master zones The named_tcp_bind_http_port would allow enabling the BIND statistics http channel which is not recommended. The audit runs getsebool named_tcp_bind_http_port and requires off (named_write_master_zones is not audited).

Méthode de vérification

Méthode d'audit: Commande shell

shell

v=$(getsebool named_tcp_bind_http_port 2>/dev/null) || exit 1
case "$v" in *'--> off') echo compliant ;; *) echo "$v" ;; esac

Sortie attendue: compliant

Méthode de correction

Méthode de correction: Recommandation ou correctif d'infrastructure

Perform the following to implement the recommended state: Disable the SELinux boolean using the setsebool command as shown below with the -P option to make the change persistent. # setsebool -P named_tcp_bind_http_port off

Propriétés

Systèmes d'exploitation: Tous
Étiquettes: binddnsselinux
Référence: CIS ISC BIND DNS Server 9.11 Benchmark v1.0.0 - 10.4 Ensure Only the Necessary SELinux Booleans are Enabled

Vérifier cet hôte

Exécutez cette commande sur une machine que vous êtes autorisé à auditer. L'analyse est en lecture seule.

shell

tmaegis scan --target bind --level 2