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

Vulnerability identifier: #VU86828

CSH Severity: Low

CVSS v4.0: 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/E:U/U:Clear

CVE-ID: CVE-2021-36411

CWE-ID: CWE-125

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vendor: struktur AG

Affected software:
libde265

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.

Install updates from vendor's website.

• 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