Vulnerability in Openssl
CVE-2023-0466
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.
Vulnerability class: Improper Certificate Validation
EPSS: 0.016 (73.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.
Affected products
- Openssl — versions 3.1.0, 3.0.0, 1.1.1
Weakness classification (CWE)
Public proof-of-concept exploits
References
- openssl-security@openssl.org (vendor-advisory, Vendor Advisory)
- openssl-security@openssl.org (Patch, Mailing List, patch)
- openssl-security@openssl.org (Patch, Mailing List, patch)
- openssl-security@openssl.org (Patch, Mailing List, patch)
- openssl-security@openssl.org (patch, Broken Link)
- openssl-security@openssl.org
- openssl-security@openssl.org
- openssl-security@openssl.org
- openssl-security@openssl.org
- openssl-security@openssl.org
Frequently asked questions
- What is CVE-2023-0466?
- CVE-2023-0466 is a medium-severity vulnerability in Openssl, classified under Improper Certificate Validation. CVSS score: 5.3/10. Published 2023-03-28.
- How severe is CVE-2023-0466?
- Medium severity. CVSS v3 base score is 5.3 out of 10.
- Is CVE-2023-0466 known to be exploited?
- 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.