RHEL 9 must use a separate file system for /var/tmp.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-257848	RHEL-09-231035	SV-257848r1044926_rule		Medium

Description

The "/var/tmp" partition is used as temporary storage by many programs. Placing "/var/tmp" in its own partition enables the setting of more restrictive mount options, which can help protect programs that use it.

STIG	Date
Red Hat Enterprise Linux 9 Security Technical Implementation Guide	2024-12-04

Details

Check Text (C-61589r1044925_chk)

Verify that a separate file system/partition has been created for "/var/tmp" with the following command:

$ mount | grep /var/tmp

/dev/mapper/rhel-tmp on /var/tmp type xfs (rw,nosuid,nodev,noexec,relatime,seclabel,attr2,inode64,logbufs=8,logbsize=32k)
Note: Options displayed for mount may differ.

If a separate entry for "/var/tmp" is not in use, this is a finding.

Fix Text (F-61513r925530_fix)

Migrate the "/var/tmp" path onto a separate file system.