#VU80565 Input validation error in OpenSSL - CVE-2023-4807

Vulnerability identifier: #VU80565

Vulnerability risk: Low

CVSSv4.0: 1.7 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-4807

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
OpenSSL
Server applications / Encryption software

Vendor: OpenSSL Software Foundation

Description

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

The vulnerability exists due to insufficient validation of user-supplied input within the POLY1305 MAC (message authentication code) implementation. A remote attacker can send specially crafted input to the application and corrupt MM registers on Windows 64 platform, resulting in a denial of service condition.

Mitigation
Install update from vendor's website.

Vulnerable software versions

OpenSSL: 1.1.1r - 1.1.1p, 3.0.0 - 3.0.10, 3.1.0 - 3.1.2

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External links
https://www.openssl.org/news/secadv/20230908.txt
https://github.com/openssl/openssl/releases/tag/OpenSSL_1_1_1w

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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.