#VU18321 Input validation error in FFmpeg - CVE-2019-9721
Published: April 19, 2019
Vulnerability identifier: #VU18321
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2019-9721
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
FFmpeg
FFmpeg
Software vendor:
ffmpeg.sourceforge.net
ffmpeg.sourceforge.net
Description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient validation of user-supplied input within the subtitle decoder in handle_open_brace() function in libavcodec/htmlsubtitles.c when processing video files in Matroska format. A remote attacker can create a specially crafted video file, pass it to the affected application and consume all available CPU resources.
Remediation
Install updates from vendor's website.