#VU68896 Buffer overflow in OpenSSL - CVE-2022-3786

Vulnerability identifier: #VU68896

Vulnerability risk: Medium

CVSSv4.0: 6.9 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/U:Green]

CVE-ID: CVE-2022-3786

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: Yes

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 a boundary error when processing the email address field length inside a X.509 certificate. A remote attacker can supply a specially crafted certificate to the application, trigger a buffer overflow and crash the application.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

OpenSSL: 3.0.0 - 3.0.6

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External links
https://www.openssl.org/news/secadv/20221101.txt

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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. However, proof of concept for this vulnerability is available.