CVE-2021-38171

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Source
https://cve.org/CVERecord?id=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
2021-08-21T17:15:07.700Z
Modified
2026-03-14T14:52:51.739805Z
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

Git / github.com/ffmpeg/ffmpeg

Affected ranges

Type
GIT
Repo
https://github.com/ffmpeg/ffmpeg
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Last affected
c5079bf3bccd24bf8ed45ff47ff4071fd09e9fd8
Fixed
9ffa49496d1aae4cbbb387aac28a9e061a6ab0a6
Database specific 
{
    "versions": [
        {
            "introduced": "0"
        },
        {
            "last_affected": "4.4"
        }
    ]
}

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

unresolved_ranges 
[
    {
        "events": [
            {
                "introduced": "0"
            },
            {
                "last_affected": "9.0"
            }
        ]
    },
    {
        "events": [
            {
                "introduced": "0"
            },
            {
                "last_affected": "10.0"
            }
        ]
    },
    {
        "events": [
            {
                "introduced": "0"
            },
            {
                "last_affected": "11.0"
            }
        ]
    }
]
vanir_signatures 
[
    {
        "signature_type": "Line",
        "signature_version": "v1",
        "target": {
            "file": "libavformat/adtsenc.c"
        },
        "id": "CVE-2021-38171-e3cbe9ce",
        "deprecated": false,
        "source": "https://github.com/ffmpeg/ffmpeg/commit/9ffa49496d1aae4cbbb387aac28a9e061a6ab0a6",
        "digest": {
            "line_hashes": [
                "340113475355395989559555410026913520501",
                "137990287974201680121919945555266282413",
                "104727278381930846197606427839919055206",
                "306440550592068726656414586700004213449",
                "111695304590519358973522263762808409562"
            ],
            "threshold": 0.9
        }
    },
    {
        "signature_type": "Function",
        "signature_version": "v1",
        "target": {
            "file": "libavformat/adtsenc.c",
            "function": "adts_decode_extradata"
        },
        "id": "CVE-2021-38171-e6f862de",
        "deprecated": false,
        "source": "https://github.com/ffmpeg/ffmpeg/commit/9ffa49496d1aae4cbbb387aac28a9e061a6ab0a6",
        "digest": {
            "function_hash": "220551853458764014735923732241586144836",
            "length": 1445.0
        }
    }
]
source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-38171.json"