UCF STIG Viewer Logo
Changes are coming to https://stigviewer.com. Take our survey to help us understand your usage and how we can better serve you in the future.
Take Survey

RHEL 9 must mount /var/tmp with the noexec option.


Overview

Finding ID Version Rule ID IA Controls Severity
V-257877 RHEL-09-231180 SV-257877r958804_rule Medium
Description
The "noexec" mount option causes the system to not execute binary files. This option must be used for mounting any file system not containing approved binary files, as they may be incompatible. 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 2024-06-04

Details

Check Text ( C-61618r925616_chk )
Verify "/var/tmp" is mounted with the "noexec" option:

$ mount | grep /var/tmp

/dev/mapper/rhel-var-tmp on /var/tmp type xfs (rw,nodev,nosuid,noexec,seclabel)

If the "/var/tmp" file system is mounted without the "noexec" option, this is a finding.
Fix Text (F-61542r925617_fix)
Modify "/etc/fstab" to use the "noexec" option on the "/var/tmp" directory.