SB2018122123 - Race condition in FFmpeg
Published: December 21, 2018 Updated: June 8, 2025
Security Bulletin ID
SB2018122123
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Race condition (CVE-ID: CVE-2015-6761)
The vulnerability allows a remote non-authenticated attacker to read and manipulate data.
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.
Remediation
Install update from vendor's website.
References
- 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