The Red Hat Enterprise Linux operating system must mount /dev/shm with the noexec option.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-81013	RHEL-07-021024	SV-95725r2_rule		Low

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 unprivileged users to attain unauthorized administrative access.

STIG	Date
Red Hat Enterprise Linux 7 Security Technical Implementation Guide	2019-03-08

Details

Check Text ( C-80727r2_chk )
Verify that the "noexec" option is configured for /dev/shm: # cat /etc/fstab | grep /dev/shm tmpfs /dev/shm tmpfs defaults,nodev,nosuid,noexec 0 0 If any results are returned and the "noexec" option is not listed, this is a finding. Verify "/dev/shm" is mounted with the "noexec" option: # mount | grep "/dev/shm" | grep noexec If no results are returned, this is a finding.

Fix Text (F-87847r2_fix)
Configure the system so that /dev/shm is mounted with the "noexec" option.