CVE-2023-0464

Severity CVSS v4.0:

Pending analysis

Type:

CWE-295 Improper Certificate Validation

Publication date:

22/03/2023

Last modified:

05/05/2025

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&#39; argument to the command line utilities or by calling the `X509_VERIFY_PARAM_set1_policies()&#39; function.

Impact

Vector 3.x

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.50 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x

7.50

Severity 3.x

HIGH

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:a:openssl:openssl::::::::	1.0.2 (including)	1.0.2zh (excluding)
cpe:2.3:a:openssl:openssl::::::::	1.1.1 (including)	1.1.1u (excluding)
cpe:2.3:a:openssl:openssl::::::::	3.0.0 (including)	3.0.9 (excluding)
cpe:2.3:a:openssl:openssl::::::::	3.1.0 (including)	3.1.1 (excluding)

To consult the complete list of CPE names with products and versions, see this page

CVE-2023-0464

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools