CVE-2019-9718

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Source
https://cve.org/CVERecord?id=CVE-2019-9718
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-9718.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2019-9718
Downstream
Related
Published
2019-03-12T09:29:00.530Z
Modified
2026-08-17T05:26:11.768574Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

In FFmpeg 3.2 and 4.1, a denial of service in the subtitle decoder allows attackers to hog the CPU via a crafted video file in Matroska format, because ffhtmlmarkupto_ass in libavcodec/htmlsubtitles.c has a complex format argument to sscanf.

Database specific 
{
    "unresolved_ranges": [
        {
            "cpes": [
                "cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*",
                "cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*",
                "cpe:2.3:o:canonical:ubuntu_linux:19.04:*:*:*:*:*:*:*"
            ],
            "source": "CPE_STRING",
            "extracted_events": [
                {
                    "introduced": "18.04"
                },
                {
                    "last_affected": "18.04"
                },
                {
                    "introduced": "18.10"
                },
                {
                    "last_affected": "18.10"
                },
                {
                    "introduced": "19.04"
                },
                {
                    "last_affected": "19.04"
                }
            ],
            "vendor_product": "canonical:ubuntu_linux"
        },
        {
            "cpes": [
                "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*"
            ],
            "source": "CPE_STRING",
            "extracted_events": [
                {
                    "introduced": "9.0"
                },
                {
                    "last_affected": "9.0"
                }
            ],
            "vendor_product": "debian:debian_linux"
        }
    ]
}
References

Affected packages

Git / git.ffmpeg.org/ffmpeg.git

Affected ranges

Type
GIT
Repo
https://git.ffmpeg.org/ffmpeg.git
Events
Introduced
340cea9f22c162e10d120835661e132721b7454b
Last affected
3c1ecb057d7621e57968624aa15ad3e9efc819f7
Fixed
1f00c97bc3475c477f3c468cf2d924d5761d0982
Database specific
Show details 
{
    "source": [
        "CPE_STRING",
        "REFERENCES"
    ],
    "cpe": [
        "cpe:2.3:a:ffmpeg:ffmpeg:3.2:*:*:*:*:*:*:*",
        "cpe:2.3:a:ffmpeg:ffmpeg:4.1:*:*:*:*:*:*:*"
    ],
    "extracted_events": [
        {
            "introduced": "3.2"
        },
        {
            "last_affected": "3.2"
        },
        {
            "introduced": "4.1"
        },
        {
            "last_affected": "4.1"
        }
    ]
}

Affected versions

3.*
3.2
4.*
4.1
n3.*
n3.2-dev
n3.3-dev
n3.4-dev
n3.5-dev
n4.*
n4.1-dev
n4.2-dev

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-9718.json"
vanir_signatures 
[
    {
        "signature_type": "Function",
        "digest": {
            "function_hash": "204917950801133920842422976060141113201",
            "length": 3748.0
        },
        "target": {
            "function": "ff_htmlmarkup_to_ass",
            "file": "libavcodec/htmlsubtitles.c"
        },
        "source": "https://git.ffmpeg.org/ffmpeg.git@1f00c97bc3475c477f3c468cf2d924d5761d0982",
        "signature_version": "v1",
        "id": "CVE-2019-9718-02509bdd",
        "deprecated": false
    },
    {
        "signature_type": "Line",
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "34876112885775822493954399157375165520",
                "310443000063906848339944236642136778273",
                "268509660667405510217173691870110624948",
                "237612654395964988526214551039992203642",
                "302584550206105672938363029647922921173",
                "191691833858206738579547090234815598181",
                "256355226088922289758953209140190868235"
            ]
        },
        "target": {
            "file": "libavcodec/htmlsubtitles.c"
        },
        "source": "https://git.ffmpeg.org/ffmpeg.git@1f00c97bc3475c477f3c468cf2d924d5761d0982",
        "signature_version": "v1",
        "id": "CVE-2019-9718-0b9c30cc",
        "deprecated": false
    }
]
vanir_signatures_modified 
"2026-08-17T05:26:11Z"

Git / github.com/ffmpeg/ffmpeg

Affected ranges

Type
GIT
Repo
https://github.com/ffmpeg/ffmpeg
Events
Introduced
340cea9f22c162e10d120835661e132721b7454b
Last affected
3c1ecb057d7621e57968624aa15ad3e9efc819f7
Fixed
23ccf3cabb4baf6e8af4b1af3fcc59c904736f21
Database specific
Show details 
{
    "source": [
        "CPE_STRING",
        "REFERENCES"
    ],
    "cpe": [
        "cpe:2.3:a:ffmpeg:ffmpeg:3.2:*:*:*:*:*:*:*",
        "cpe:2.3:a:ffmpeg:ffmpeg:4.1:*:*:*:*:*:*:*"
    ],
    "extracted_events": [
        {
            "introduced": "3.2"
        },
        {
            "last_affected": "3.2"
        },
        {
            "introduced": "4.1"
        },
        {
            "last_affected": "4.1"
        }
    ]
}

Affected versions

3.*
3.2
4.*
4.1
n3.*
n3.2
n3.2-dev
n3.2.1
n3.2.10
n3.2.11
n3.2.12
n3.2.13
n3.2.2
n3.2.3
n3.2.4
n3.2.5
n3.2.6
n3.2.7
n3.2.8
n3.2.9
n3.3-dev
n3.4-dev
n3.5-dev
n4.*
n4.1-dev

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-9718.json"
vanir_signatures 
[
    {
        "signature_type": "Function",
        "digest": {
            "function_hash": "134429341697870814247987316111924007456",
            "length": 3632.0
        },
        "target": {
            "function": "ff_htmlmarkup_to_ass",
            "file": "libavcodec/htmlsubtitles.c"
        },
        "source": "https://github.com/ffmpeg/ffmpeg/commit/23ccf3cabb4baf6e8af4b1af3fcc59c904736f21",
        "signature_version": "v1",
        "id": "CVE-2019-9718-755ab778",
        "deprecated": false
    },
    {
        "signature_type": "Line",
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "146229409084369695006291932218330531278",
                "186871920662715219977446106701134555870",
                "310562769026243982809424482522257025845",
                "34344457376983665913898773828430549216",
                "260166848363255873671710857472511837215",
                "80024346695892532889397988976103392180",
                "202968329324838149850240999019982554458"
            ]
        },
        "target": {
            "file": "libavcodec/htmlsubtitles.c"
        },
        "source": "https://github.com/ffmpeg/ffmpeg/commit/23ccf3cabb4baf6e8af4b1af3fcc59c904736f21",
        "signature_version": "v1",
        "id": "CVE-2019-9718-da1a4911",
        "deprecated": false
    }
]
vanir_signatures_modified 
"2026-08-17T05:26:11Z"