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CVE-2023-0466

5.3 · MEDIUM

The function X509_VERIFY_PARAM_add0_policy() is documented to implicitly enable the certificate policy check when doing certificate verification.

Published Mar 28, 2023CWE-295EPSS 1.77%

Overview

CVE-2023-0466 is a medium-severity vulnerability. It was published on March 28, 2023 and has a CVSS 3.1 base score of 5.3 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

The function X509_VERIFY_PARAM_add0_policy() is documented to

implicitly enable the certificate policy check when doing certificate

verification. However the implementation of the function does not

enable the check which allows certificates with invalid or incorrect

policies to pass the certificate verification.

As suddenly enabling the policy check could break existing deployments it was

decided to keep the existing behavior of the X509_VERIFY_PARAM_add0_policy()

function.

Instead the applications that require OpenSSL to perform certificate

policy check need to use X509_VERIFY_PARAM_set1_policies() or explicitly

enable the policy check by calling X509_VERIFY_PARAM_set_flags() with

the X509_V_FLAG_POLICY_CHECK flag argument.

Certificate policy checks are disabled by default in OpenSSL and are not

commonly used by applications.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refwww.openwall.com/lists/oss-security/2023/09/28/4Refgit.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=0d16b7e99aafc0b4a6d729eec65a411a7e025f0aRefgit.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=51e8a84ce742db0f6c70510d0159dad8f7825908Refgit.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=73398dea26de9899fb4baa94098ad0a61f435c72Refgit.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=fc814a30fc4f0bc54fcea7d9a7462f5457aab061Reflists.debian.org/debian-lts-announce/2023/06/msg00011.htmlRefsecurity.gentoo.org/glsa/202402-08Refsecurity.netapp.com/advisory/ntap-20230414-0001/Refwww.debian.org/security/2023/dsa-5417Refwww.openssl.org/news/secadv/20230328.txt

How CyberStrike helps

Frequently asked questions

What is CVE-2023-0466?

CVE-2023-0466 is a medium-severity vulnerability. It was published on March 28, 2023 and has a CVSS 3.1 base score of 5.3 (MEDIUM).

How severe is CVE-2023-0466?

This vulnerability has a CVSS 3.1 base score of 5.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2023-0466?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2023-0466?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-0466 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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