SB2019081680 - Out-of-bounds read in ffmpeg (Alpine package)
Published: August 16, 2019
Security Bulletin ID
SB2019081680
Severity
High
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) Out-of-bounds read (CVE-ID: CVE-2018-13305)
The vulnerability allows a remote non-authenticated attacker to #BASIC_IMPACT#.
In FFmpeg 4.0.1, due to a missing check for negative values of the mquant variable, the vc1_put_blocks_clamped function in libavcodec/vc1_block.c may trigger an out-of-array access while converting a crafted AVI file to MPEG4, leading to an information disclosure or a denial of service.
Remediation
Install update from vendor's website.