VulnerabilityModified
CVE-2019-9718
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.
MEDIUM 6.5EPSS 1.57%
Does this matter?
Lower severity and a low EPSS score (1.57%). Track it; it rarely justifies an emergency change on its own.
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 3.1
- 6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- EPSS
- 1.57% probability · 74th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-125
- Affected
- ffmpeg/ffmpeg · debian/debian linux · canonical/ubuntu linux
- Source
- cve@mitre.org
References
- http://www.securityfocus.com/bid/107382Broken Link
- https://git.ffmpeg.org/gitweb/ffmpeg.git/commit/1f00c97bc3475c477f3c468cf2d924d5761d0982Patch, Third Party Advisory
- https://github.com/FFmpeg/FFmpeg/commit/23ccf3cabb4baf6e8af4b1af3fcc59c904736f21Patch, Third Party Advisory
- https://seclists.org/bugtraq/2019/May/60Mailing List, Third 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/1f00c97bc3475c477f3c468cf2d924d5761d0982Patch, Third Party Advisory
- https://github.com/FFmpeg/FFmpeg/commit/23ccf3cabb4baf6e8af4b1af3fcc59c904736f21Patch, Third Party Advisory
- https://seclists.org/bugtraq/2019/May/60Mailing List, Third Party Advisory
- https://usn.ubuntu.com/3967-1/Third Party Advisory
- https://www.debian.org/security/2019/dsa-4449Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.