SV-281228r1268226: RHEL 10 must prevent special devices on file systems that are imported via Network File System (NFS). | Red Hat Enterprise Linux 10 STIG SCAP Benchmark

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Assessment Title

Rule Text

RHEL 10 must prevent special devices on file systems that are imported via Network File System (NFS).

Description

Discussion Text

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.

How this relates to the STIG checklist: STIG vs SCAP benchmark.

IA Controls

NIST SP 800-53

Not mappedCCI-000213

References

DPMS Target Red Hat Enterprise Linux 10 DISA DPMS Target Red Hat Enterprise Linux 10 5733

SCC Automation Reference

The reconstructed evaluation script behind this rule's OVAL check(s) — every module a compound check combines, with this rule's own concrete values and DISA's SCC tool's real per-module mechanism curated from static teardown of SCC releases.

#!/bin/bash
# Reconstructed from oval:mil.disa.stig.rhel10os:def:281228
# RHEL 10 must prevent special devices on file systems that are imported via Network File System (NFS).
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# textfilecontent54_object (textfilecontent54_test)
test_1() {
  (sed -En 's/^\s*[^#\s][^\s]*\s+[^\s]+\s+nfs[^\s]*\s+([^\s]+)/\1/p' '/etc/fstab') | grep -Pq '(^|,)nodev(,|$)'
}

if test_1; then
  echo "PASS"
else
  echo "FAIL"
fi

Assessment Script Powered by AISandbox-executed

A standalone Shell script to assess this control automatically. Review before running it in your environment.

Syntax-checked and actually executed in an isolated sandbox (not the real system this checks) — confirmed to run without errors.

#!/bin/sh
# oval:mil.disa.stig.rhel10os:def:281228
if [ ! -f "/etc/fstab" ]; then echo "PASS"; exit 0; fi
for line in $(grep -w "nfs" /etc/fstab); do if [[ $line =~ (^|,)nodev(,|$) ]]; then continue; else echo "FAIL"; exit 1; fi; done; echo "PASS"; exit 0;

Remediation

Configure RHEL 10 to prevent special devices on file systems that are imported via NFS.

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