Out-of-bounds Read in Ffmpeg
CVE-2019-9721
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.014 (72.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 72nd percentile — 72.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: 0.000
Affected products
- Ffmpeg — versions 3.2, 4.1
- Canonical Ubuntu Linux — versions 18.04, 18.10, 19.04
Weakness classification (CWE)
References
- www.securityfocus.com/bid/107384 (vdb-entry, Broken Link)
- git.ffmpeg.org/gitweb/ffmpeg.git/commit/894995c41e0795c7a44f81adc4838dedc3932e65 (Patch, Mailing List, Third Party Advisory)
- usn.ubuntu.com/3967-1/ (vendor-advisory, Third Party Advisory)
- github.com/FFmpeg/FFmpeg/commit/273f2755ce8635d42da3cde0eeba15b2e7842774 (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2019-9721?
- CVE-2019-9721 is a medium-severity vulnerability in Ffmpeg, classified under Out-of-bounds Read. CVSS score: 6.5/10. Published 2019-03-12.
- How severe is CVE-2019-9721?
- Medium severity. CVSS v3 base score is 6.5 out of 10.