CVE-2019-9721 Information

Description

A denial of service in the subtitle decoder in FFmpeg 4.1 allows attackers to hog the CPU via a crafted video file in Matroska format because handle_open_brace in libavcodec/htmlsubtitles.c has a complex format argument to sscanf.

CVSS Vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Reference

http://www.securityfocus.com/bid/107384 https://git.ffmpeg.org/gitweb/ffmpeg.git/commit/894995c41e0795c7a44f81adc4838dedc3932e65 https://usn.ubuntu.com/3967-1/

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

6.5