CVE ID:	CVE-2019-9718
Description:	In FFmpeg 3.2 and 4.1, a denial of service in the subtitle decoder allows attackers to hog the CPU via a crafted video file in Matroska format, because ff_htmlmarkup_to_ass in libavcodec/htmlsubtitles.c has a complex format argument to sscanf.
Test IDs:	None available
Cross References:	Common Vulnerability Exposure (CVE) ID: CVE-2019-9718 BugTraq ID: 107382 http://www.securityfocus.com/bid/107382 Bugtraq: 20190523 [SECURITY] [DSA 4449-1] ffmpeg security update (Google Search) https://seclists.org/bugtraq/2019/May/60 Debian Security Information: DSA-4449 (Google Search) https://www.debian.org/security/2019/dsa-4449 https://git.ffmpeg.org/gitweb/ffmpeg.git/commit/1f00c97bc3475c477f3c468cf2d924d5761d0982 https://github.com/FFmpeg/FFmpeg/commit/23ccf3cabb4baf6e8af4b1af3fcc59c904736f21 https://usn.ubuntu.com/3967-1/