#VU62766 Security features bypass in OpenSSL - CVE-2022-1343

Vulnerability identifier: #VU62766

Vulnerability risk: Medium

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

CVE-ID: CVE-2022-1343

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 when validating OCSP response within the OCSP_basic_verify function. In the case where the (non-default) flag OCSP_NOCHECKS is used then the response will be positive (meaning a successful verification) even in the case where the response signing certificate fails to verify. A remote attacker can perform MitM attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

OpenSSL: 3.0.0 - 3.0.2

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External links
https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=2eda98790c5c2741d76d23cc1e74b0dc4f4b391a
https://www.openssl.org/news/secadv/20220503.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.