Vulnerability identifier: #VU74149

Vulnerability risk: Low

CVSSv3.1: 4.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-0466

CWE-ID: CWE-254

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 MitM attack.

The vulnerability exists due to an error within the X509_VERIFY_PARAM_add0_policy() function, which does not perform the certificate policy check despite being implicitly enabled. A remote attacker can bypass expected security restrictions and perform MitM attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

OpenSSL: 3.1.0, 3.0.0 - 3.0.8, 1.0.2 - 1.0.2zg, 1.1.1 - 1.1.1t, 1.1.0 - 1.1.0l, 1.0.1 - 1.0.1u, 1.0.0 - 1.0.0t

---

External links
http://www.openssl.org/news/secadv/20230328.txt

---

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.