Kernel stack information leak when processing audio ioctls (CVE-2016-6698)

Release Date:

November 11, 2016

Affected Projects:

Android for MSMFirefox OS for MSMQRD Android

Advisory ID:

QCIR-2016-00056-1

CVE ID(s):

CVE-2016-6698

Summary:

The following security vulnerabilities have been identified: CVE-2016-6698 There is a kernel stack information leak when processing audio ioctls in the audio driver. In case of AUDIO_GET_WMAPRO_CONFIG_32, wmapro_config_32 is on the stack. Due to alignment, the size of it is 24 bytes. The last 2 bytes are padding bytes which are not initialized and leaked to userland via “copy_to_user”.

Access Vector: Local

Security Risk: Medium

Access Vector: Local

Affected Versions:

All Android releases from CAF using the Linux kernel.

Patch:

We advise customers to apply the following patches:

Individual Patches

• CVE-2016-6698: https://www.codeaurora.org/gitweb/quic/la/?p=kernel/msm-3.18.git;a=commit;h=3baefa3af45c0ab1ca8391821ea55b9049a3a3da

Acknowledgement:

This issue was reported to Google by an external security researcher. Qualcomm Innovation Center, Inc. (QuIC) thanks Google for bringing this issue to QuIC's attention.

Revisions:

Initial revision

Contact: