Time-of-Check Time-of-Use Vulnerability in IPA Driver (CVE-2016-3867)

Release Date:

October 3, 2016

Affected Projects:

Android for MSMFirefox OS for MSMQRD Android

Advisory ID:

QCIR-2016-00041-1

CVE ID(s):

CVE-2016-3867

Summary:

When a user-space module calls ioctl to kernel, IPA driver performs a copy of arguments twice without data validation of the test counter. If the test counter changes during the second copy instance, a race condition vulnerability occurs resulting in a memory stack overflow.

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-2016-3867: https://source.codeaurora.org/quic/la/kernel/msm-3.18/commit/?id=b1b1ab29ea6cba135b46f35e1742d7985fc01ece

Acknowledgement:

Qualcomm Innovation Center, Inc. (QuIC) thanks Google for bringing this issue to our attention. This issue was reported to Google through the Android Security Rewards program.

Revisions:

Initial

Contact: