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.
References (4)
Core 4
Core References
Broken Link vdb-entry
x_refsource_bid
http://www.securityfocus.com/bid/107384
Mailing List, Patch, Third Party Advisory x_refsource_misc
https://git.ffmpeg.org/gitweb/ffmpeg.git/commit/894995c41e0795c7a44f81adc4838dedc3932e65
Third Party Advisory vendor-advisory
x_refsource_ubuntu
https://usn.ubuntu.com/3967-1/
Patch, Third Party Advisory x_refsource_misc
https://github.com/FFmpeg/FFmpeg/commit/273f2755ce8635d42da3cde0eeba15b2e7842774
Scores
CVSS v3
6.5
EPSS
0.0050
EPSS Percentile
66.1%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Details
CWE
CWE-125
Status
published
Products (5)
canonical/ubuntu_linux
18.04
canonical/ubuntu_linux
18.10
canonical/ubuntu_linux
19.04
ffmpeg/ffmpeg
3.2
ffmpeg/ffmpeg
4.1
Published
Mar 12, 2019
Tracked Since
Feb 18, 2026