Medium severity · published Mar 12, 2019
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…
6.5
CVSS
1.6%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.6% · higher than 75% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DL
Debian Linux · Debian
9.0 · source: NVD
FF
Ffmpeg · Ffmpeg
3.2; 4.1 · source: NVD
UL
Ubuntu Linux · Canonical
18.04; 18.10; 19.04 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-9718
CVE.org
https://www.cve.org/CVERecord?id=CVE-2019-9718
Broken Link
http://www.securityfocus.com/bid/107382
Patch
https://git.ffmpeg.org/gitweb/ffmpeg.git/commit/1f00c97bc3475c477f3c468cf2d924d5761d0982
Patch
https://github.com/FFmpeg/FFmpeg/commit/23ccf3cabb4baf6e8af4b1af3fcc59c904736f21
Mailing List
https://seclists.org/bugtraq/2019/May/60
Third Party Advisory
https://usn.ubuntu.com/3967-1/
Third Party Advisory
https://www.debian.org/security/2019/dsa-4449
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