CVE-2021-38171

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Source
https://nvd.nist.gov/vuln/detail/CVE-2021-38171
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-38171.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2021-38171
Downstream
Related
Published
2021-08-21T17:15:07Z
Modified
2025-09-05T06:07:15.412135Z
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

Affected packages

Debian:11 / ffmpeg

Package

Name
ffmpeg
Purl
pkg:deb/debian/ffmpeg?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
7:4.3.3-0+deb11u1

Affected versions

7:4.*

7:4.3.2-0+deb11u2
7:4.3.2-1
7:4.3.2-2

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:12 / ffmpeg

Package

Name
ffmpeg
Purl
pkg:deb/debian/ffmpeg?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
7:4.4.1-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:13 / ffmpeg

Package

Name
ffmpeg
Purl
pkg:deb/debian/ffmpeg?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
7:4.4.1-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:14 / ffmpeg

Package

Name
ffmpeg
Purl
pkg:deb/debian/ffmpeg?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
7:4.4.1-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Git / git.ffmpeg.org/ffmpeg.git

Affected ranges

Type
GIT
Repo
https://git.ffmpeg.org/ffmpeg.git
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Last affected
c5079bf3bccd24bf8ed45ff47ff4071fd09e9fd8
Type
GIT
Repo
https://github.com/ffmpeg/ffmpeg
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
9ffa49496d1aae4cbbb387aac28a9e061a6ab0a6

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"
            },
            "digest": {
                "threshold": 0.9,
                "line_hashes": [
                    "340113475355395989559555410026913520501",
                    "137990287974201680121919945555266282413",
                    "104727278381930846197606427839919055206",
                    "306440550592068726656414586700004213449",
                    "111695304590519358973522263762808409562"
                ]
            },
            "id": "CVE-2021-38171-e3cbe9ce",
            "signature_version": "v1",
            "deprecated": false,
            "signature_type": "Line"
        },
        {
            "source": "https://github.com/ffmpeg/ffmpeg/commit/9ffa49496d1aae4cbbb387aac28a9e061a6ab0a6",
            "target": {
                "file": "libavformat/adtsenc.c",
                "function": "adts_decode_extradata"
            },
            "digest": {
                "length": 1445.0,
                "function_hash": "220551853458764014735923732241586144836"
            },
            "id": "CVE-2021-38171-e6f862de",
            "signature_version": "v1",
            "deprecated": false,
            "signature_type": "Function"
        }
    ]
}