Out-of-bounds read in libde265 - CVE-2021-36411

Vulnerability identifier: #VU86828

CSH Severity: Low

CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]

CVE-ID: CVE-2021-36411

CWE-ID: CWE-125

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary condition within the derive_boundaryStrength() function in deblock.cc. A remote attacker can pass a specially crafted file to the application, trigger an out-of-bounds read error and perform a denial of service (DoS) attack.

libde265
Ubuntu
libde265-0 (Ubuntu package)

Install updates from vendor's website.

libde265 - update to 1.0.9
libde265-0 (Ubuntu package) - addressed in versions Ubuntu Pro, 1.0.4-1ubuntu0.2, 1.0.8-1ubuntu0.1

• https://github.com/strukturag/libde265/issues/302
• https://lists.debian.org/debian-lts-announce/2022/12/msg00027.html
• https://www.debian.org/security/2023/dsa-5346

• Multiple vulnerabilities in libde265
• Ubuntu update for libde265