Vulnerability Details 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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.005
EPSS Ranking 63.3%
CVSS Severity
CVSS v3 Score 6.5
CVSS v2 Score 4.3
References
- http://www.securityfocus.com/bid/107384
- https://git.ffmpeg.org/gitweb/ffmpeg.git/commit/894995c41e0795c7a44f81adc4838dedc3932e65
- https://github.com/FFmpeg/FFmpeg/commit/273f2755ce8635d42da3cde0eeba15b2e7842774
- https://usn.ubuntu.com/3967-1/
- http://www.securityfocus.com/bid/107384
- https://git.ffmpeg.org/gitweb/ffmpeg.git/commit/894995c41e0795c7a44f81adc4838dedc3932e65
- https://github.com/FFmpeg/FFmpeg/commit/273f2755ce8635d42da3cde0eeba15b2e7842774
- https://usn.ubuntu.com/3967-1/
Products affected by CVE-2019-9721
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cpe:2.3:a:ffmpeg:ffmpeg:3.2
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cpe:2.3:a:ffmpeg:ffmpeg:4.1
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cpe:2.3:o:canonical:ubuntu_linux:18.04
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cpe:2.3:o:canonical:ubuntu_linux:18.10
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cpe:2.3:o:canonical:ubuntu_linux:19.04