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V-282640

CAT II (Medium)

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

Rule ID

SV-282640r1200900_rule

STIG

Tri-Lab Operating System Stack (TOSS) 5 Security Technical Implementation Guide

Version

V1R1

CCIs

CCI-000366

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 Content

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.

Fix Text

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