AlmaLinux OS 9 must mount /tmp with the nosuid option.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-269319 | ALMA-09-027080 | SV-269319r1050201_rule | CCI-001764 | 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 | |||
| CloudLinux AlmaLinux OS 9 Security Technical Implementation Guide | 2025-05-22 | |||
Details
Check Text (C-269319r1050201_chk)
Verify "/tmp" is mounted with the "nosuid" option:
$ mount | grep ' /tmp'
tmpfs on /tmp type tmpfs (rw,nosuid,nodev,noexec,relatime,seclabel,size=2097152k,inode64)
If the "/tmp" file system is mounted without the "nosuid" option, this is a finding.
Fix Text (F-73251r1048334_fix)
Modify "/etc/fstab" to use the "nosuid" option on the "/tmp" directory.