STIGUI
V-271641CAT II — Medium severitySV-271641r1091635_rule

OL 9 must prevent special devices on file systems that are imported via Network File System (NFS).

Rule version OL09-00-002011 · STIG v1 · 2026-08-21

Discussion

The "nodev" mount option causes the system to not interpret character or block special devices. Executing character or block special devices from untrusted file systems increases the opportunity for nonprivileged users to attain unauthorized administrative access.

Check

If no NFS mounts are configured, this requirement is Not Applicable.

Verify that OL 9 has the "nodev" option configured for all NFS mounts with the following command:

$ cat /etc/fstab | grep nfs 192.168.22.2:/mnt/export /data nfs4 rw,nosuid,nodev,noexec,sync,soft,sec=krb5:krb5i:krb5p

If the system is mounting file systems via NFS and the "nodev" option is missing, this is a finding.

Fix

Update each NFS mounted file system to use the "nodev" option on file systems that are being imported via NFS.

Identifiers

Group ID
V-271641
Group title
SRG-OS-000480-GPOS-00227
Rule ID
SV-271641r1091635_rule
Check ID
C-75691r1091633_chk
Fix ID
F-75598r1091634_fix