Audio devices must have mode 0660 or less permissive.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-1048	GEN002320	SV-37566r1_rule	ECLP-1	Medium

Description

Audio and video devices that are globally accessible have proven to be another security hazard. There is software that can activate system microphones and video devices connected to user workstations and/or X terminals. Once the microphone has been activated, it is possible to eavesdrop on otherwise private conversations without the victim being aware of it. This action effectively changes the user's microphone into a bugging device.

STIG	Date
Red Hat Enterprise Linux 5 Security Technical Implementation Guide	2017-03-01

Details

Check Text ( C-36215r1_chk )
Check the mode of audio devices. # ls -lL /dev/audio* /dev/snd/* If the mode of audio devices are more permissive than 660, this is a finding.

Fix Text (F-31476r1_fix)
Change the mode of audio devices. # chmod 0660