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← Back to Oracle Linux 9 Security Technical Implementation Guide

V-271665

CAT II (Medium)

OL 9 must mount /var/tmp with the nosuid option.

Rule ID

SV-271665r1091707_rule

STIG

Oracle Linux 9 Security Technical Implementation Guide

Version

V1R5

CCIs

CCI-001764

Discussion

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.

Check Content

Verify that OL 9 is configured to mount /var/tmp with the nosuid option.

Verify "/var/tmp" is mounted with the "nosuid" option:

$ mount | grep /var/tmp
/dev/mapper/ol-var-tmp on /var/tmp type xfs (rw,nodev,nosuid,noexec,seclabel)

If the "/var/tmp" file system is mounted without the "nosuid" option, this is a finding.

Fix Text

Configure OL 9 to mount /var/tmp with the nosuid option.

Modify "/etc/fstab" to use the "nosuid" option on the "/var/tmp" directory.