{"id":"UBUNTU-CVE-2017-16803","details":"In Libav through 11.11 and 12.x through 12.1, the smacker_decode_tree function in libavcodec/smacker.c does not properly restrict tree recursion, which allows remote attackers to cause a denial of service (bitstream.c:build_table() out-of-bounds read and application crash) via a crafted Smacker stream.","modified":"2026-04-22T11:19:42.219761Z","published":"2017-11-13T17:29:00Z","upstream":["CVE-2017-16803"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2017-16803"},{"type":"REPORT","url":"https://bugzilla.libav.org/show_bug.cgi?id=1098"},{"type":"REPORT","url":"https://github.com/libav/libav/commit/cd4663dc80323ba64989d0c103d51ad3ee0e9c2f"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2017-16803"}],"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=esm-infra-legacy/trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"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","6:9.20-0ubuntu0.14.04.1+esm1"],"ecosystem_specific":{"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-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-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-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-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":"libavresample1"},{"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-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/2017/UBUNTU-CVE-2017-16803.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}