Vulnerability in Openssl
CVE-2023-0465
Applications that use a non-default option when verifying certificates may be vulnerable to an attack from a malicious CA to circumvent certain checks. Invalid certificate policies in leaf certificates are silently ignored by OpenSSL and other certificate policy checks are skipped for that certificate. A malicious CA could use this to deliberately assert invalid certificate policies in order to circumvent policy checking on the certificate altogether. Policy processing is disabled by default but can be enabled by passing the `-policy' argument to the command line utilities or by calling the `X509_VERIFY_PARAM_set1_policies()' function.
Vulnerability class: Improper Certificate Validation
EPSS: 0.016 (73.0th 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
Frequently asked questions
- What is CVE-2023-0465?
- CVE-2023-0465 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-2023-0465?
- Medium severity. CVSS v3 base score is 5.3 out of 10.
- Is CVE-2023-0465 known to be exploited?
- 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.