#VU86489 Heap-based buffer overflow in libde265 - CVE-2020-21598

Vulnerability identifier: #VU86489

Vulnerability risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2020-21598

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 execute arbitrary code on the target system.

The vulnerability exists due to a boundary error within the ff_hevc_put_unweighted_pred_8_sse() function. A remote attacker can pass specially crafted input to the application, trigger a heap-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

libde265: 0.1 - 1.0.9

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External links
https://github.com/strukturag/libde265/issues/237
https://cwe.mitre.org/data/definitions/122.html
https://lists.debian.org/debian-lts-announce/2023/01/msg00020.html
https://www.debian.org/security/2023/dsa-5346

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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.