CVE-2017-16803: Buffer Overflow
First published: Mon Nov 13 2017(Updated: )
In Libav through 11.11 and 12.x through 12.1, the smacker_decode_tree function in libavcodec/smacker.c does not properly restrict tree recursion, which allows remote attackers to cause a denial of service (bitstream.c:build_table() out-of-bounds read and application crash) via a crafted Smacker stream.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/ffmpeg | 7:4.1.9-0+deb10u1 7:4.1.11-0+deb10u1 7:4.3.6-0+deb11u1 7:5.1.3-1 7:6.0-7 | |
| libavutil | <=11.11 | |
| libavutil | =12.0 | |
| libavutil | =12.1 |
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Reference Links
- https://bugzilla.libav.org/show_bug.cgi?id=1098
- https://github.com/libav/libav/commit/cd4663dc80323ba64989d0c103d51ad3ee0e9c2f
- https://git.ffmpeg.org/gitweb/ffmpeg.git/commit/cd4663dc80323ba64989d0c103d51ad3ee0e9c2f
- https://git.ffmpeg.org/gitweb/ffmpeg.git/commitdiff/b829da363985cb2f80130bba304cc29a632f6446
- https://security-tracker.debian.org/tracker/CVE-2017-16803
- http://www.securityfocus.com/bid/101882
- https://security.gentoo.org/glsa/201811-19
- https://www.debian.org/security/2018/dsa-4119
Frequently Asked Questions
What is the severity of CVE-2017-16803?
CVE-2017-16803 has a medium severity due to its potential to cause denial of service through application crashes.
How do I fix CVE-2017-16803?
To fix CVE-2017-16803, update to Libav version 11.12 or later, or use the specified versions of ffmpeg provided by Debian.
Who is affected by CVE-2017-16803?
CVE-2017-16803 affects users running Libav versions up to 11.11 and the 12.x versions up to 12.1, as well as specific versions of ffmpeg.
What type of attack does CVE-2017-16803 facilitate?
CVE-2017-16803 facilitates remote denial of service attacks by allowing out-of-bounds reads, which can crash the application.
What is the main cause of CVE-2017-16803?
The main cause of CVE-2017-16803 is the lack of proper restrictions on tree recursion within the smacker_decode_tree function.
- collector/security-tracker-debian
- agent/type
- agent/last-modified-date
- agent/first-publish-date
- agent/weakness
- agent/severity
- agent/author
- agent/references
- agent/softwarecombine
- agent/tags
- agent/description
- agent/event
- collector/nvd-index
- agent/software-canonical-lookup-request
- package-manager/debian
- vendor/libav
- canonical/libavutil
- version/libavutil/11.11
- version/libavutil/12.0
- version/libavutil/12.1