CVE-2019-9718 — MEDIUM (6.5)

Vulnerability Description

In FFmpeg 3.2 and 4.1, a denial of service in the subtitle decoder allows attackers to hog the CPU via a crafted video file in Matroska format, because ff_htmlmarkup_to_ass in libavcodec/htmlsubtitles.c has a complex format argument to sscanf.

CVSS Score

6.5

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality

NONE

Integrity

NONE

Availability

HIGH

Affected Products

Vendor	Product	Versions
Ffmpeg	Ffmpeg	3.2
Debian	Debian Linux	9.0
Canonical	Ubuntu Linux	18.04

Related Weaknesses (CWE)

CWE-125

References

http://www.securityfocus.com/bid/107382Broken Link
https://git.ffmpeg.org/gitweb/ffmpeg.git/commit/1f00c97bc3475c477f3c468cf2d924d5PatchThird Party Advisory
https://github.com/FFmpeg/FFmpeg/commit/23ccf3cabb4baf6e8af4b1af3fcc59c904736f21PatchThird Party Advisory
https://seclists.org/bugtraq/2019/May/60Mailing ListThird Party Advisory
https://usn.ubuntu.com/3967-1/Third Party Advisory
https://www.debian.org/security/2019/dsa-4449Third Party Advisory
http://www.securityfocus.com/bid/107382Broken Link
https://git.ffmpeg.org/gitweb/ffmpeg.git/commit/1f00c97bc3475c477f3c468cf2d924d5PatchThird Party Advisory
https://github.com/FFmpeg/FFmpeg/commit/23ccf3cabb4baf6e8af4b1af3fcc59c904736f21PatchThird Party Advisory
https://seclists.org/bugtraq/2019/May/60Mailing ListThird Party Advisory
https://usn.ubuntu.com/3967-1/Third Party Advisory
https://www.debian.org/security/2019/dsa-4449Third Party Advisory

FAQ

What is CVE-2019-9718?

CVE-2019-9718 is a vulnerability with a CVSS score of 6.5 (MEDIUM). In FFmpeg 3.2 and 4.1, a denial of service in the subtitle decoder allows attackers to hog the CPU via a crafted video file in Matroska format, because ff_htmlmarkup_to_ass in libavcodec/htmlsubtitles...

How severe is CVE-2019-9718?

CVE-2019-9718 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2019-9718?

Check the references section above for vendor advisories and patch information. Affected products include: Ffmpeg Ffmpeg, Debian Debian Linux, Canonical Ubuntu Linux.