Critical severity · published Aug 21, 2021
CVE-2021-38171
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…
9.8
CVSS
2.4%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)2.4% · higher than 84% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DL
Debian Linux · Debian
9.0; 10.0; 11.0 · source: NVD
FF
Ffmpeg · Ffmpeg
4.4 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-38171
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-38171
Patch
https://github.com/FFmpeg/FFmpeg/commit/9ffa49496d1aae4cbbb387aac28a9e061a6ab0a6
Mailing List
https://lists.debian.org/debian-lts-announce/2021/11/msg00012.html
patchwork.ffmpeg.org
https://patchwork.ffmpeg.org/project/ffmpeg/patch/AS8P193MB12542A86E22F8207EC971930B6F19%40AS8P193MB1254.EURP193.PROD.OUTLOOK.COM/
security.gentoo.org
https://security.gentoo.org/glsa/202312-14
Third Party Advisory
https://www.debian.org/security/2021/dsa-4990
Third Party Advisory
https://www.debian.org/security/2021/dsa-4998
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