CVE-2015-6761: Race Condition
First published: Thu Oct 15 2015(Updated: )
The update_dimensions function in libavcodec/vp8.c in FFmpeg through 2.8.1, as used in Google Chrome before 46.0.2490.71 and other products, relies on a coefficient-partition count during multi-threaded operation, which allows remote attackers to cause a denial of service (race condition and memory corruption) or possibly have unspecified other impact via a crafted WebM file.
Credit: cve-coordination@google.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| FFmpeg | <=2.8.1 | |
| Google Chrome | <=45.0.2454.101 |
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Reference Links
- http://git.videolan.org/?p=ffmpeg.git;a=commit;h=dabea74d0e82ea80cd344f630497cafcb3ef872c
- http://googlechromereleases.blogspot.com/2015/10/stable-channel-update.html
- http://rhn.redhat.com/errata/RHSA-2015-1912.html
- http://www.debian.org/security/2015/dsa-3376
- http://www.securityfocus.com/bid/77073
- http://www.securitytracker.com/id/1033816
- http://www.ubuntu.com/usn/USN-2770-1
- http://www.ubuntu.com/usn/USN-2770-2
- https://code.google.com/p/chromium/issues/detail?id=447860
- https://code.google.com/p/chromium/issues/detail?id=532967
- https://codereview.chromium.org/1376913003
- https://lists.debian.org/debian-lts-announce/2018/12/msg00009.html
- https://security.gentoo.org/glsa/201603-09
- http://git.videolan.org/?p=ffmpeg.git%3Ba=commit%3Bh=dabea74d0e82ea80cd344f630497cafcb3ef872c
Frequently Asked Questions
What is the severity of CVE-2015-6761?
CVE-2015-6761 is classified as a denial of service vulnerability that can cause crashes during multi-threaded operations.
How can CVE-2015-6761 be mitigated?
To mitigate CVE-2015-6761, users should update FFmpeg to version 2.8.2 or later and ensure Google Chrome is updated to version 46.0.2490.71 or later.
Which versions of FFmpeg are affected by CVE-2015-6761?
FFmpeg versions up to and including 2.8.1 are affected by CVE-2015-6761.
Which versions of Google Chrome are vulnerable to CVE-2015-6761?
Google Chrome versions prior to 46.0.2490.71 are vulnerable to CVE-2015-6761.
What causes the vulnerability in CVE-2015-6761?
CVE-2015-6761 is caused by a race condition in the update_dimensions function that relies on coefficient-partition counts during multi-threaded operations.
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- agent/softwarecombine
- collector/mitre-cve
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- agent/references
- agent/last-modified-date
- agent/first-publish-date
- agent/event
- agent/source
- agent/tags
- collector/nvd-index
- agent/software-canonical-lookup-request
- vendor/ffmpeg
- canonical/ffmpeg
- version/ffmpeg/2.8.1
- vendor/google
- canonical/google chrome
- version/google chrome/45.0.2454.101