RHEL 9 must mount /var/log with the nosuid option.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-257872	RHEL-09-231155	SV-257872r925603_rule		Medium

Description
The "nosuid" mount option causes the system to not execute "setuid" and "setgid" files with owner privileges. This option must be used for mounting any file system not containing approved "setuid" and "setguid" files. Executing files from untrusted file systems increases the opportunity for nonprivileged users to attain unauthorized administrative access.

STIG	Date
Red Hat Enterprise Linux 9 Security Technical Implementation Guide	2023-12-01

Details

Check Text ( C-61613r925601_chk )
Verify "/var/log" is mounted with the "nosuid" option: $ mount | grep /var/log /dev/mapper/rhel-var-log on /var/log type xfs (rw,nodev,nosuid,noexec,seclabel) If the "/var/log" file system is mounted without the "nosuid" option, this is a finding.

Fix Text (F-61537r925602_fix)
Modify "/etc/fstab" to use the "nosuid" option on the "/var/log" directory.