VYPR
Unrated severityNVD Advisory· Published Mar 22, 2023· Updated May 5, 2025

Excessive Resource Usage Verifying X.509 Policy Constraints

CVE-2023-0464

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.

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Affected products

119

Patches

Vulnerability mechanics

References

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