{"id":"UBUNTU-CVE-2016-9820","details":"libavcodec/mpegvideo_motion.c in libav 11.8 allows remote attackers to cause a denial of service (crash) via vectors involving left shift of a negative value.","modified":"2025-09-08T16:43:57Z","published":"2017-03-01T15:59:00Z","upstream":["CVE-2016-9820"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2016-9820"},{"type":"REPORT","url":"https://blogs.gentoo.org/ago/2016/12/01/libav-multiple-crashes-from-the-undefined-behavior-sanitizer"},{"type":"REPORT","url":"https://github.com/asarubbo/poc/blob/master/00036-libav-leftshift-mpegvideo"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2016-9820"}],"affected":[{"package":{"name":"libav","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/libav@6:9.20-0ubuntu0.14.04.1+esm1?arch=source&distro=trusty/esm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6:9.20-0ubuntu0.14.04.1+esm1"}]}],"versions":["6:0.8.7-1ubuntu2","6:9.10-1ubuntu1","6:9.10-1ubuntu2","6:9.10-1ubuntu5","6:9.10-1ubuntu6","6:9.10-1ubuntu7","6:9.11-2ubuntu1","6:9.11-2ubuntu2","6:9.13-0ubuntu0.14.04.1","6:9.14-0ubuntu0.14.04.1","6:9.16-0ubuntu0.14.04.1","6:9.18-0ubuntu0.14.04.1","6:9.20-0ubuntu0.14.04.1"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro","binaries":[{"binary_version":"6:9.20-0ubuntu0.14.04.1+esm1","binary_name":"libav-tools"},{"binary_version":"6:9.20-0ubuntu0.14.04.1+esm1","binary_name":"libavcodec-dev"},{"binary_version":"6:9.20-0ubuntu0.14.04.1+esm1","binary_name":"libavcodec-extra"},{"binary_version":"6:9.20-0ubuntu0.14.04.1+esm1","binary_name":"libavcodec-extra-54"},{"binary_version":"6:9.20-0ubuntu0.14.04.1+esm1","binary_name":"libavcodec54"},{"binary_version":"6:9.20-0ubuntu0.14.04.1+esm1","binary_name":"libavdevice-dev"},{"binary_version":"6:9.20-0ubuntu0.14.04.1+esm1","binary_name":"libavdevice-extra-53"},{"binary_version":"6:9.20-0ubuntu0.14.04.1+esm1","binary_name":"libavdevice53"},{"binary_version":"6:9.20-0ubuntu0.14.04.1+esm1","binary_name":"libavfilter-dev"},{"binary_version":"6:9.20-0ubuntu0.14.04.1+esm1","binary_name":"libavfilter-extra-3"},{"binary_version":"6:9.20-0ubuntu0.14.04.1+esm1","binary_name":"libavfilter3"},{"binary_version":"6:9.20-0ubuntu0.14.04.1+esm1","binary_name":"libavformat-dev"},{"binary_version":"6:9.20-0ubuntu0.14.04.1+esm1","binary_name":"libavformat-extra-54"},{"binary_version":"6:9.20-0ubuntu0.14.04.1+esm1","binary_name":"libavformat54"},{"binary_version":"6:9.20-0ubuntu0.14.04.1+esm1","binary_name":"libavresample-dev"},{"binary_version":"6:9.20-0ubuntu0.14.04.1+esm1","binary_name":"libavresample1"},{"binary_version":"6:9.20-0ubuntu0.14.04.1+esm1","binary_name":"libavutil-dev"},{"binary_version":"6:9.20-0ubuntu0.14.04.1+esm1","binary_name":"libavutil-extra-52"},{"binary_version":"6:9.20-0ubuntu0.14.04.1+esm1","binary_name":"libavutil52"},{"binary_version":"6:9.20-0ubuntu0.14.04.1+esm1","binary_name":"libswscale-dev"},{"binary_version":"6:9.20-0ubuntu0.14.04.1+esm1","binary_name":"libswscale-extra-2"},{"binary_version":"6:9.20-0ubuntu0.14.04.1+esm1","binary_name":"libswscale2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2016/UBUNTU-CVE-2016-9820.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}