Out-of-bounds write in FFmpeg - CVE-2020-35965
Published: May 26, 2021
Vulnerability identifier: #VU53601
CSH Severity: High
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2020-35965
CWE-ID: CWE-787
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 compromise vulnerable system.
The vulnerability exists due to a boundary error when processing untrusted input within the decode_frame() function in libavcodec/exr.c. A remote attacker can create a specially crafted file, trick the victim into opening it using the affected software, trigger out-of-bounds write and execute arbitrary code on the target system.
Remediation
Install updates from vendor's website.
External links
- https://github.com/FFmpeg/FFmpeg/commit/3e5959b3457f7f1856d997261e6ac672bba49e8b
- https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=26532
- https://github.com/FFmpeg/FFmpeg/commit/b0a8b40294ea212c1938348ff112ef1b9bf16bb3
- https://lists.debian.org/debian-lts-announce/2021/01/msg00026.html
- https://security.gentoo.org/glsa/202105-24