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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-924 GEN002280 SV-924r6_rule ECLP-1 Medium
Description
System device files in writable directories could be modified, removed, or used by an unprivileged user to control system hardware.
STIG Date
Draft AIX Security Technical Implementation Guide 2011-08-17

Details

Check Text ( C-465r3_chk )
Find all device files existing anywhere on the system.

Procedure:
# find / -type b -print > devicelist
# find / -type c -print >> devicelist

Check the permissions on the directories above 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-1078r3_fix)
Remove the world-writable permission from the device file(s).

Procedure:
# chmod o-w

Document all changes.