SB2019081677 - Input validation error in ffmpeg (Alpine package)
Published: August 16, 2019
Security Bulletin ID
SB2019081677
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Input validation error (CVE-ID: CVE-2019-9718)
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 ff_htmlmarkup_to_ass() 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 update from vendor's website.
References
- https://git.alpinelinux.org/aports/commit/?id=8b2616ec00d3b29a5bdc2fce68c0594898b57b63
- https://git.alpinelinux.org/aports/commit/?id=adac785d84798e462af5871aa7df312c6510c248
- https://git.alpinelinux.org/aports/commit/?id=d8d38dabc6e30c901eb6bd6627d8337849d7c041
- https://git.alpinelinux.org/aports/commit/?id=cf78a820406ae4481e937bc2fba252ff79c89a09
- https://git.alpinelinux.org/aports/commit/?id=859fd99d06049c009c8b745626511cd681061a99