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Check: GEN002320

AIX 6.1 SECURITY TECHNICAL IMPLEMENTATION GUIDE: GEN002320 (in versions v1 r14 through v1 r10)

Title

Audio devices must have mode 0660 or less permissive. (Cat II impact)

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 to a bugging device.

Check Content

Check the mode of audio devices. # /usr/sbin/lsdev -C | grep -i audio # ls -lL /dev/*aud0 If the mode of audio devices are more permissive than 0660, this is a finding.

Fix Text

Change the mode of audio devices. # chmod o-w <audio device>

Additional Identifiers

Rule ID: SV-27243r1_rule

Vulnerability ID: V-1048

Group Title: GEN002320

Expert Comments

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CCIs

CCIs tied to check.

Number	Definition
CCI-000225	The organization employs the concept of least privilege, allowing only authorized accesses for users (and processes acting on behalf of users) which are necessary to accomplish assigned tasks in accordance with organizational missions and business functions.

Controls

Controls tied to check. These are derived from the CCIs shown above.

Number	Title
AC-6	Least Privilege