#VU86376 Heap-based buffer overflow in libde265 - CVE-2020-21597

Vulnerability identifier: #VU86376

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-21597

CWE-ID: CWE-122

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
libde265
Mobile applications / Libraries for mobile applications

Vendor: struktur AG

Description

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

The vulnerability exists due to a boundary error within the mc_chroma() function. A remote attacker can pass specially crafted file to the application, trigger a heap-based buffer overflow and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

libde265: 0.1 - 1.0.9

---

External links
https://github.com/strukturag/libde265/issues/238
https://lists.debian.org/debian-lts-announce/2023/01/msg00020.html
https://www.debian.org/security/2023/dsa-5346

---

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.