Out-of-bounds read in VLC Media Player - CVE-2021-25803
Published: January 21, 2021 / Updated: June 20, 2022
Vulnerability identifier: #VU49889
CSH Severity: Medium
CVSS v4: 5.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-25803
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary condition within the vlc_input_attachment_New component. A remote authenticated attacker can create a specially crafted .avi file, trick the victim into opening it, trigger out-of-bounds read error and cause a denial of service condition on the system.
Affected software
VLC Media Player
vlc (Debian package)
vlc (Ubuntu package)
vlc-plugin-access-extra (Ubuntu package)
Ubuntu
vlc (Debian package)
vlc (Ubuntu package)
vlc-plugin-access-extra (Ubuntu package)
Ubuntu
How to mitigate CVE-2021-25803
Install updates from vendor's website.
VLC Media Player - update to 3.0.12
vlc (Debian package) - update to 3.0.12-0+deb10u1
vlc (Ubuntu package) - addressed in versions Ubuntu Pro, 3.0.17.4-5ubuntu0.1
vlc-plugin-access-extra (Ubuntu package) - addressed in versions Ubuntu Pro, 3.0.17.4-5ubuntu0.1
vlc (Debian package) - update to 3.0.12-0+deb10u1
vlc (Ubuntu package) - addressed in versions Ubuntu Pro, 3.0.17.4-5ubuntu0.1
vlc-plugin-access-extra (Ubuntu package) - addressed in versions Ubuntu Pro, 3.0.17.4-5ubuntu0.1