OL 9 must mount /dev/shm with the noexec option.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-271651 | OL09-00-002041 | SV-271651r1091665_rule | CCI-001764 | 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 | |||
| Oracle Linux 9 Security Technical Implementation Guide | 2025-05-08 | |||
Details
Check Text (C-271651r1091665_chk)
Verify that OL 9 is configured to mount /dev/shm with the noexec option.
Verify "/dev/shm" is mounted with the "noexec" option with the following command:
$ mount | grep /dev/shm
tmpfs on /dev/shm type tmpfs (rw,nodev,nosuid,noexec,seclabel)
If the /dev/shm file system is mounted without the "noexec" option, this is a finding.
Fix Text (F-75608r1091664_fix)
Configure OL 9 to mount /dev/shm with the noexec option.
Modify "/etc/fstab" to use the "noexec" option on the "/dev/shm" file system.