CVE-2023-0466 Certificate policy check not enabled
Applications relying on implicit policy checks in OpenSSL may accept invalid certificates, requiring explicit configuration to enforce policy verification.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-0466?
CVE-2023-0466 is a medium-severity vulnerability in Openssl Openssl, published on 28 Mar 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-295
Which versions are affected by CVE-2023-0466?
It affects 1 product.
Products include Openssl Openssl.
How do I fix CVE-2023-0466?
Change a configuration setting.
Is CVE-2023-0466 being exploited?
There is no known exploitation of CVE-2023-0466 in the wild and no public exploit code.
Other vulnerabilities in Openssl Openssl
Sources
Also known as ALPINE-CVE-2023-0466, AZL-25936, AZL-47700, DEBIAN-CVE-2023-0466, GHSA-pxvj-4wx4-gv6w, JLSEC-2026-237 and 1 more.