CVE-2021-38171
CRITICALFFmpeg 4.4 - Denial of Service via Unchecked Return Value in adts_decode_extradata
Title source: llmDescription
adts_decode_extradata in libavformat/adtsenc.c in FFmpeg 4.4 does not check the init_get_bits return value, which is a necessary step because the second argument to init_get_bits can be crafted.
References (6)
Core 6
Core References
Third Party Advisory vendor-advisory
https://www.debian.org/security/2021/dsa-4990
Third Party Advisory vendor-advisory
https://www.debian.org/security/2021/dsa-4998
Mailing List, Third Party Advisory mailing-list
https://lists.debian.org/debian-lts-announce/2021/11/msg00012.html
Third Party Advisory vendor-advisory
https://security.gentoo.org/glsa/202312-14
Various Sources
https://patchwork.ffmpeg.org/project/ffmpeg/patch/AS8P193MB12542A86E22F8207EC971930B6F19%40AS8P193MB1254.EURP193.PROD.OUTLOOK.COM/
Patch, Third Party Advisory
https://github.com/FFmpeg/FFmpeg/commit/9ffa49496d1aae4cbbb387aac28a9e061a6ab0a6
Scores
CVSS v3
9.8
EPSS
0.0241
EPSS Percentile
81.9%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Details
CWE
CWE-252
Status
published
Products (4)
debian/debian_linux
9.0
debian/debian_linux
10.0
debian/debian_linux
11.0
ffmpeg/ffmpeg
4.4
Published
Aug 21, 2021
Tracked Since
Feb 18, 2026