Audio devices must have mode 0660 or less permissive.

From Oracle Linux 5 Security Technical Implementation Guide

Associated with: CCI-000225

SV-63247r1_rule Audio devices must have mode 0660 or less permissive.

Vulnerability discussion

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.

Check content

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

Change the mode of audio devices. # chmod 0660

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