aa_read_header in libavformat/aadec.c in FFmpeg before 3.2.14 and 4.x before 4.1.4 does not check for sscanf failure and consequently allows use of uninitialized variables.
https://www.debian.org/security/2019/dsa-4502
https://usn.ubuntu.com/4431-1/
https://security.gentoo.org/glsa/202003-65
https://github.com/FFmpeg/FFmpeg/compare/a97ea53...ba11e40
https://github.com/FFmpeg/FFmpeg/commit/ed188f6dcdf0935c939ed813cf8745d50742014b
https://seclists.org/bugtraq/2019/Aug/30
https://git.ffmpeg.org/gitweb/ffmpeg.git/shortlog/n4.1.4
https://git.ffmpeg.org/gitweb/ffmpeg.git/commit/9b4004c054964a49c7ba44583f4cee22486dd8f2
http://www.securityfocus.com/bid/109317
Source: Mitre, NVD
Published: 2019-06-04
Updated: 2020-08-24
Base Score: 7.5
Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P
Severity: High
Base Score: 9.8
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Severity: Critical
EPSS: 0.01704