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The Red Hat Enterprise Linux operating system must disable the file system automounter unless required.


Overview

Finding ID Version Rule ID IA Controls Severity
V-204451 RHEL-07-020110 SV-204451r853893_rule Medium
Description
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, SRG-OS-000480-GPOS-00227
STIG Date
Red Hat Enterprise Linux 7 Security Technical Implementation Guide 2022-12-06

Details

Check Text ( C-4575r88545_chk )
Verify the operating system disables the ability to automount devices.

Check to see if automounter service is active with the following command:

# systemctl status autofs
autofs.service - Automounts filesystems on demand
Loaded: loaded (/usr/lib/systemd/system/autofs.service; disabled)
Active: inactive (dead)

If the "autofs" status is set to "active" and is not documented with the Information System Security Officer (ISSO) as an operational requirement, this is a finding.
Fix Text (F-4575r88546_fix)
Configure the operating system to disable the ability to automount devices.

Turn off the automount service with the following commands:

# systemctl stop autofs
# systemctl disable autofs

If "autofs" is required for Network File System (NFS), it must be documented with the ISSO.