CVE-2019-9721

Published: 12 March 2019

A denial of service in the subtitle decoder in FFmpeg 3.2 and 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.

Priority

Cvss 3 Severity Score

6.5

Score breakdown

Status

Package	Release	Status
ffmpeg Launchpad, Ubuntu, Debian	bionic	Released (7:3.4.6-0ubuntu0.18.04.1)
	cosmic	Released (7:4.0.4-0ubuntu1)
	disco	Released (7:4.1.3-0ubuntu1)
	trusty	Does not exist
	upstream	Needs triage
	xenial	Not vulnerable (code not present)

Severity score breakdown

Parameter	Value
Base score	6.5
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	Required
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

References

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