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.
http://www.securityfocus.com/bid/101882
https://bugzilla.libav.org/show_bug.cgi?id=1098
https://github.com/libav/libav/commit/cd4663dc80323ba64989d0c103d51ad3ee0e9c2f
Source: MITRE
Published: 2017-11-13
Updated: 2018-11-27
Type: CWE-119
Base Score: 5
Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P
Impact Score: 2.9
Exploitability Score: 10
Severity: MEDIUM
Base Score: 7.5
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Impact Score: 3.6
Exploitability Score: 3.9
Severity: HIGH