CVE-2019-9721
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2019-9721
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2019-9721.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2019-9721
- Downstream
- Related
- Published
- 2019-03-12T09:29:00Z
- Modified
- 2025-10-20T12:11:18.800194Z
- 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
-
A denial of service in the subtitle decoder in FFmpeg 3.2 and 4.1 allows attackers to hog the CPU via a crafted video file in Matroska format, because handleopenbrace in libavcodec/htmlsubtitles.c has a complex format argument to sscanf.
- References
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
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
Database specific
vanir_signatures
[
{
"digest": {
"function_hash": "51195086334001458191859035190219042570",
"length": 3610.0
},
"id": "CVE-2019-9721-1e4b4ede",
"target": {
"file": "libavcodec/htmlsubtitles.c",
"function": "ff_htmlmarkup_to_ass"
},
"source": "https://github.com/ffmpeg/ffmpeg/commit/273f2755ce8635d42da3cde0eeba15b2e7842774",
"signature_version": "v1",
"signature_type": "Function",
"deprecated": false
},
{
"digest": {
"line_hashes": [
"181052376676104601782979859616773957010",
"114335331683057061847747733341231002884",
"52182576610393413327815494532710655027",
"151988408299784471571915177291850664201",
"143530476180291881434987183528048468203",
"20671168889515778463202263099394878314",
"117734745311139794259276495167403311113",
"247691314197916473622205852293270336349",
"91970035849042864838408869607449612939",
"298548214798456625181670453837162301144",
"51594798183235078235674705393957355135",
"244888744203267073148994254791264550488"
],
"threshold": 0.9
},
"id": "CVE-2019-9721-efb6ae89",
"target": {
"file": "libavcodec/htmlsubtitles.c"
},
"source": "https://github.com/ffmpeg/ffmpeg/commit/273f2755ce8635d42da3cde0eeba15b2e7842774",
"signature_version": "v1",
"signature_type": "Line",
"deprecated": false
}
]