CVE-2019-9721
6.5
MEDIUM
CVSS 3.1
EPSS 0.50%
Description
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 handle_open_brace in libavcodec/htmlsubtitles.c has a complex format argument to sscanf.
How to fix CVE-2019-9721
To remediate CVE-2019-9721, upgrade the affected package to a fixed version below.
- Debian/ffmpeg—upgrade to 7:4.1.3-1 or later
Is CVE-2019-9721 being exploited?
Low — EPSS is 0.5%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 7:4.1.3-1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |