Bug 1708107 (CVE-2019-9721) - CVE-2019-9721 ffmpeg: complex format argument in handle_open_brace in libavcodec/htmlsubtitles.c causing denial of service
Summary: CVE-2019-9721 ffmpeg: complex format argument in handle_open_brace in libavco...
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2019-9721
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
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Whiteboard:
Depends On:
Blocks: 1708110
TreeView+ depends on / blocked
 
Reported: 2019-05-09 07:29 UTC by Dhananjay Arunesh
Modified: 2021-02-16 21:58 UTC (History)
1 user (show)

Fixed In Version:
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Last Closed: 2019-05-14 15:44:24 UTC
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Description Dhananjay Arunesh 2019-05-09 07:29:30 UTC 
A denial of service in the subtitle decoder in FFmpeg 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.

Upstream commit:
https://git.ffmpeg.org/gitweb/ffmpeg.git/commitdiff/894995c41e0795c7a44f81adc4838dedc3932e65
Comment 1 Stefan Cornelius 2019-05-14 15:44:27 UTC 
Statement:

This issue did not affect the versions of qffmpeg as shipped with Red Hat Enterprise Linux 5.
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