AIX device files and directories must only be writable by users with a system account or as configured by the vendor.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-91483	AIX7-00-001019	SV-101581r1_rule		Medium

Description
System device files in writable directories could be modified, removed, or used by an unprivileged user to control system hardware.

STIG	Date
IBM AIX 7.x Security Technical Implementation Guide	2020-02-24

Details

Check Text ( C-90637r1_chk )
Find all device files existing anywhere on the system using commands: # find / -type b -print \| xargs ls -l > devicelistB # find / -type c -print \| xargs ls -l > devicelistC Look at devicelistB and devicelistC files to check the permissions on the device files and directories above the subdirectories containing device files. If any of the device files or their parent directories are world-writable, excepting device files specifically intended to be world-writable, such as "/dev/null", this is a finding.

Check Text ( C-90637r1_chk )

Find all device files existing anywhere on the system using commands:
# find / -type b -print | xargs ls -l > devicelistB
# find / -type c -print | xargs ls -l > devicelistC

Look at devicelistB and devicelistC files to check the permissions on the device files and directories above the subdirectories containing device files.

If any of the device files or their parent directories are world-writable, excepting device files specifically intended to be world-writable, such as "/dev/null", this is a finding.

Fix Text (F-97681r1_fix)
Remove the world-writable permission from the device file(s) using command: # chmod o-w