SV-281273r1184699: RHEL 10 must prevent a user from overriding the disabling of the graphical user interface automount function. | Red Hat Enterprise Linux 10 STIG SCAP Benchmark

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Assessment Title

Rule Text

RHEL 10 must prevent a user from overriding the disabling of the graphical user interface automount function.

Description

Discussion Text

Without identifying and authenticating devices, unidentified or unknown devices may be introduced, thereby facilitating malicious activity. Peripherals include, but are not limited to, such devices as flash drives, external storage, and printers. 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:281273
# RHEL 10 must prevent a user from overriding the disabling of the graphical user interface automount function.
# 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() {
  grep -Pq '^\s*system-db\s*:\s*local\s*$' '/etc/dconf/profile/user' &>/dev/null
}
# textfilecontent54_object (textfilecontent54_test)
test_2() {
  grep -rqP --include='*' '^/org/gnome/desktop/media-handling/automount-open$' '/etc/dconf/db/local.d/locks' &>/dev/null
}

if ( test_1 && test_2 ); 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:281273
if [ ! -d "/etc/dconf/profile/user" ]; then echo "PASS"; exit 0; fi
if [ ! -f "/etc/dconf/db/local.d/locks/00-security-settings-lock" ]; then echo "FAIL"; exit 1; fi
if grep -q "^/org/gnome/desktop/media-handling/automount-open$" "/etc/dconf/db/local.d/locks/00-security-settings-lock"; then echo "PASS"; exit 0; fi
echo "FAIL"; exit 1

Remediation

Configure RHEL 10 so that the GNOME desktop does not allow a user to change the setting that disables automated mounting 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/locks/00-security-settings-lock" file to prevent user modification:

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

/org/gnome/desktop/media-handling/automount-open

Update the dconf system databases:

$ sudo dconf update