Title

Removable media, remote file systems, and any file system that does not contain approved device files must be mounted with the "nodev" option. (Cat II impact)

Discussion

The "nodev" (or equivalent) mount option causes the system to not handle device files as system devices. This option must be used for mounting any file system that does not contain approved device files. Device files can provide direct access to system hardware and can compromise security if not protected.

Check Content

If the system does not support a "nodev" option, this is not applicable. Check /etc/fstab (or equivalent) and verify the "nodev" mount option (or equivalent) is used on any file systems mounted from removable media or network shares, or file systems that do not contain any approved device files. If any such file system is not using the "nodev" option, this is a finding.

Fix Text

Edit /etc/fstab (or equivalent) and add the "nodev" mount option (or equivalent) to all entries for remote or removable media file systems, and file systems that contain no approved device files.

Additional Identifiers

Rule ID: SV-26015r1_rule

Vulnerability ID: V-22368

Group Title: GEN002430

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.