{"id":"UBUNTU-CVE-2019-9718","details":"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.","modified":"2026-04-22T12:24:32.177835Z","published":"2019-03-12T00:00:00Z","related":["USN-3967-1"],"upstream":["CVE-2019-9718"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2019-9718"},{"type":"REPORT","url":"https://git.ffmpeg.org/gitweb/ffmpeg.git/commit/1f00c97bc3475c477f3c468cf2d924d5761d0982"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-3967-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2019-9718"}],"affected":[{"package":{"name":"ffmpeg","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/ffmpeg@7:3.4.6-0ubuntu0.18.04.1?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7:3.4.6-0ubuntu0.18.04.1"}]}],"versions":["7:3.3.4-2","7:3.3.4-2build3","7:3.4-2ubuntu2","7:3.4-4","7:3.4-4build1","7:3.4.1-1","7:3.4.1-1build1","7:3.4.2-1","7:3.4.2-1build1","7:3.4.2-2","7:3.4.4-0ubuntu0.18.04.1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"ffmpeg","binary_version":"7:3.4.6-0ubuntu0.18.04.1"},{"binary_name":"libavcodec-extra","binary_version":"7:3.4.6-0ubuntu0.18.04.1"},{"binary_name":"libavcodec-extra57","binary_version":"7:3.4.6-0ubuntu0.18.04.1"},{"binary_name":"libavcodec57","binary_version":"7:3.4.6-0ubuntu0.18.04.1"},{"binary_name":"libavdevice57","binary_version":"7:3.4.6-0ubuntu0.18.04.1"},{"binary_name":"libavfilter-extra","binary_version":"7:3.4.6-0ubuntu0.18.04.1"},{"binary_name":"libavfilter-extra6","binary_version":"7:3.4.6-0ubuntu0.18.04.1"},{"binary_name":"libavfilter6","binary_version":"7:3.4.6-0ubuntu0.18.04.1"},{"binary_name":"libavformat57","binary_version":"7:3.4.6-0ubuntu0.18.04.1"},{"binary_name":"libavresample3","binary_version":"7:3.4.6-0ubuntu0.18.04.1"},{"binary_name":"libavutil55","binary_version":"7:3.4.6-0ubuntu0.18.04.1"},{"binary_name":"libpostproc54","binary_version":"7:3.4.6-0ubuntu0.18.04.1"},{"binary_name":"libswresample2","binary_version":"7:3.4.6-0ubuntu0.18.04.1"},{"binary_name":"libswscale4","binary_version":"7:3.4.6-0ubuntu0.18.04.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2019/UBUNTU-CVE-2019-9718.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"},{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}