CVE-2021-38171
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2021-38171
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-38171.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2021-38171
- Downstream
- Related
- Published
- 2021-08-21T17:15:07Z
- Modified
- 2025-10-22T18:17:37.002509Z
- Severity
-
- 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- [none]
- Details
-
adtsdecodeextradata in libavformat/adtsenc.c in FFmpeg 4.4 does not check the initgetbits return value, which is a necessary step because the second argument to initgetbits can be crafted.
- References
-
- https://github.com/FFmpeg/FFmpeg/commit/9ffa49496d1aae4cbbb387aac28a9e061a6ab0a6
- https://lists.debian.org/debian-lts-announce/2021/11/msg00012.html
- https://security.gentoo.org/glsa/202312-14
- https://www.debian.org/security/2021/dsa-4990
- https://www.debian.org/security/2021/dsa-4998
- https://patchwork.ffmpeg.org/project/ffmpeg/patch/AS8P193MB12542A86E22F8207EC971930B6F19%40AS8P193MB1254.EURP193.PROD.OUTLOOK.COM/
Affected packages
Git / git.ffmpeg.org/ffmpeg.git
Git / git.ffmpeg.org/ffmpeg.git
Affected ranges
- Type
- GIT
- Repo
- https://github.com/ffmpeg/ffmpeg
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedFixed
Affected versions
Other
N
n0.*
n0.11-dev
n0.12-dev
n0.8
n1.*
n1.1-dev
n1.2-dev
n1.3-dev
n2.*
n2.0
n2.1-dev
n2.2-dev
n2.3-dev
n2.4-dev
n2.5-dev
n2.6-dev
n2.7-dev
n2.8-dev
n2.9-dev
n3.*
n3.1-dev
n3.2-dev
n3.3-dev
n3.4-dev
n3.5-dev
n4.*
n4.1-dev
n4.2-dev
n4.3-dev
n4.4-dev
n4.5-dev
Database specific
vanir_signatures
[
{
"source": "https://github.com/ffmpeg/ffmpeg/commit/9ffa49496d1aae4cbbb387aac28a9e061a6ab0a6",
"target": {
"file": "libavformat/adtsenc.c"
},
"signature_type": "Line",
"deprecated": false,
"id": "CVE-2021-38171-e3cbe9ce",
"signature_version": "v1",
"digest": {
"line_hashes": [
"340113475355395989559555410026913520501",
"137990287974201680121919945555266282413",
"104727278381930846197606427839919055206",
"306440550592068726656414586700004213449",
"111695304590519358973522263762808409562"
],
"threshold": 0.9
}
},
{
"source": "https://github.com/ffmpeg/ffmpeg/commit/9ffa49496d1aae4cbbb387aac28a9e061a6ab0a6",
"target": {
"function": "adts_decode_extradata",
"file": "libavformat/adtsenc.c"
},
"signature_type": "Function",
"deprecated": false,
"id": "CVE-2021-38171-e6f862de",
"signature_version": "v1",
"digest": {
"function_hash": "220551853458764014735923732241586144836",
"length": 1445.0
}
}
]