SV-281291r1166825: RHEL 10 must disable the graphical user interface automounter unless required. | Red Hat Enterprise Linux 10 STIG SCAP Benchmark

Loading benchmark…

Assessment Title

Rule Text

RHEL 10 must disable the graphical user interface automounter unless required.

Description

Discussion Text

Automatically mounting file systems permits easy introduction of unknown devices, thereby facilitating malicious activity. Satisfies: SRG-OS-000114-GPOS-00059, SRG-OS-000378-GPOS-00163

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

IA Controls

NIST SP 800-53

Not mappedCCI-000778Not mappedCCI-001958

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:281291
# RHEL 10 must disable the graphical user interface automounter unless required.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# The operating system disables the GUI automount feature.
# textfilecontent54_object (textfilecontent54_test)
test_1() {
  (sed -En 's/^\s*\[org\\/gnome\\/desktop\\/media-handling]\s*\n+[^\[]*automount-open\s*=\s*(\w+)$/\1/p' '/etc/dconf/db/local.d/00-security-settings') | grep -qxF 'false'
}

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 definition: oval:mil.disa.stig.rhel10os:def:281291

if [ ! -d "/etc/dconf/db/local.d" ]; then echo "PASS"; exit 0; fi
if [ ! -f "/etc/dconf/db/local.d/00-security-settings" ]; then echo "PASS"; exit 0; fi
grep -q "^\\s*\\[org\\/gnome\\/desktop\\/media-handling]\\s*\\n+[^\\[]*automount-open\\s*=\\s*false$" "/etc/dconf/db/local.d/00-security-settings" && echo "PASS" && exit 0 || echo "FAIL" && exit 1

Remediation

Configure RHEL 10 GNOME to disable automated mount of removable media.

Note: The example below is using the database "local" for the system. If the system is using another database in "/etc/dconf/profile/user", the file should be created under the appropriate subdirectory.

Update the "/etc/dconf/db/local.d/00-security-settings" database file with the following lines:

$ sudo vi /etc/dconf/db/local.d/00-security-settings

[org/gnome/desktop/media-handling]
automount-open=false

Update the dconf system databases:

$ sudo dconf update