{"id":"UBUNTU-CVE-2020-21697","details":"A heap-use-after-free in the mpeg_mux_write_packet function in libavformat/mpegenc.c of FFmpeg 4.2 allows to cause a denial of service (DOS) via a crafted avi file.","modified":"2026-05-20T16:04:16.059711438Z","published":"2021-08-10T21:15:00Z","related":["USN-5167-1","USN-5472-1"],"upstream":["CVE-2020-21697"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-21697"},{"type":"REPORT","url":"https://trac.ffmpeg.org/ticket/8188"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-5472-1"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-5167-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2020-21697"}],"affected":[{"package":{"name":"ffmpeg","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/ffmpeg?arch=source&distro=esm-apps%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7:2.8.17-0ubuntu0.1+esm2"}]}],"versions":["7:2.7.2-1build1","7:2.8.1-1ubuntu1","7:2.8.2-1ubuntu1","7:2.8.3-1","7:2.8.4-1","7:2.8.4-1ubuntu1","7:2.8.4-1ubuntu2","7:2.8.4-1ubuntu3","7:2.8.4-1ubuntu4","7:2.8.6-1ubuntu1","7:2.8.6-1ubuntu2","7:2.8.8-0ubuntu0.16.04.1","7:2.8.10-0ubuntu0.16.04.1","7:2.8.11-0ubuntu0.16.04.1","7:2.8.14-0ubuntu0.16.04.1","7:2.8.15-0ubuntu0.16.04.1","7:2.8.15-0ubuntu0.16.04.1+esm1","7:2.8.17-0ubuntu0.1","7:2.8.17-0ubuntu0.1+esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"ffmpeg","binary_version":"7:2.8.17-0ubuntu0.1+esm2"},{"binary_name":"libav-tools","binary_version":"7:2.8.17-0ubuntu0.1+esm2"},{"binary_name":"libavcodec-extra","binary_version":"7:2.8.17-0ubuntu0.1+esm2"},{"binary_name":"libavcodec-ffmpeg-extra56","binary_version":"7:2.8.17-0ubuntu0.1+esm2"},{"binary_name":"libavcodec-ffmpeg56","binary_version":"7:2.8.17-0ubuntu0.1+esm2"},{"binary_name":"libavdevice-ffmpeg56","binary_version":"7:2.8.17-0ubuntu0.1+esm2"},{"binary_name":"libavfilter-ffmpeg5","binary_version":"7:2.8.17-0ubuntu0.1+esm2"},{"binary_name":"libavformat-ffmpeg56","binary_version":"7:2.8.17-0ubuntu0.1+esm2"},{"binary_name":"libavresample-ffmpeg2","binary_version":"7:2.8.17-0ubuntu0.1+esm2"},{"binary_name":"libavutil-ffmpeg54","binary_version":"7:2.8.17-0ubuntu0.1+esm2"},{"binary_name":"libpostproc-ffmpeg53","binary_version":"7:2.8.17-0ubuntu0.1+esm2"},{"binary_name":"libswresample-ffmpeg1","binary_version":"7:2.8.17-0ubuntu0.1+esm2"},{"binary_name":"libswscale-ffmpeg3","binary_version":"7:2.8.17-0ubuntu0.1+esm2"}],"availability":"Available 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