STIGQter STIGQter: STIG Summary: Tri-Lab Operating System Stack (TOSS) 5 Security Technical Implementation Guide Version: 1 Release: 1 Benchmark Date: 26 Mar 2026:

TOSS 5 must prevent special devices on file systems that are imported via Network File System (NFS).

DISA Rule

SV-282640r1200900_rule

Vulnerability Number

V-282640

Group Title

SRG-OS-000480-GPOS-00227

Rule Version

TOSS-05-000135

Severity

CAT II

CCI(s)

Weight

10

Fix Recommendation

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

Check Contents

Verify TOSS 5 has the "nodev" option configured for all NFS mounts using the following command:

Note: If no NFS mounts are configured, this requirement is not applicable.

$ 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.

Vulnerability Number

V-282640

Documentable

False

Rule Version

TOSS-05-000135

Severity Override Guidance

Verify TOSS 5 has the "nodev" option configured for all NFS mounts using the following command:

Note: If no NFS mounts are configured, this requirement is not applicable.

$ 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.

Check Content Reference

M

Target Key

5738