CVE-2023-0464 - CVE House
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Status published Unknown CVE-2023-0464

Excessive Resource Usage Verifying X.509 Policy Constraints

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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • David Benjamin (Google)
  • Dr Paul Dale

References

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Affected Vendor

Affected Software

OpenSSL
Vulnerable Versions:
3.1.0, 3.0.0, 1.1.1, 1.0.2

Timeline

Official Publish: March 22nd, 2023
Last Modified: May 5th, 2025
Added to House: July 22nd, 2026

CVSS Vectors

No vector data available

Weaknesses (CWE)

No CWE data available

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.