CVE-2015-6821: Input Validation
First published: Sun Sep 06 2015(Updated: )
The ff_mpv_common_init function in libavcodec/mpegvideo.c in FFmpeg before 2.7.2 does not properly maintain the encoding context, which allows remote attackers to cause a denial of service (invalid pointer access) or possibly have unspecified other impact via crafted MPEG data.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| FFmpeg | <=2.7.1 |
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Reference Links
- http://ffmpeg.org/security.html
- http://git.videolan.org/?p=ffmpeg.git;a=commit;h=b160fc290cf49b516c5b6ee0730fd9da7fc623b1
- http://www.securitytracker.com/id/1033483
- https://lists.debian.org/debian-lts-announce/2018/12/msg00009.html
- http://git.videolan.org/?p=ffmpeg.git%3Ba=commit%3Bh=b160fc290cf49b516c5b6ee0730fd9da7fc623b1
Frequently Asked Questions
What is the severity of CVE-2015-6821?
CVE-2015-6821 is classified as a medium severity vulnerability due to the potential for denial of service attacks.
How do I fix CVE-2015-6821?
To fix CVE-2015-6821, upgrade FFmpeg to version 2.7.2 or later.
What impact does CVE-2015-6821 have on systems?
CVE-2015-6821 can lead to a denial of service through invalid pointer access when processing crafted MPEG data.
Which versions of FFmpeg are affected by CVE-2015-6821?
CVE-2015-6821 affects FFmpeg versions prior to 2.7.2.
Is there a workaround for CVE-2015-6821?
There is no known workaround for CVE-2015-6821 other than upgrading to a patched version.
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