OpenSSL X509_VERIFY_PARAM_add0_policy Denial of Service Vulnerability

Description

A security vulnerability has been identified in all supported versions of OpenSSL related to the verification of X.509 certificate chains that include policy constraints. Attackers may be able to exploit this vulnerability by creating a malicious certificate chain that triggers exponential use of computational resources, leading to a denial-of-service (DoS) attack on affected systems. 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.

Affected Applications

OpenSSL

CVE References

CVE-2023-0464 CVE-2023-0465 CVE-2023-0466

Other References

https://www.openssl.org/news/vulnerabilities.html