CVE-2023-0464

HIGH

OpenSSL 1.0.2-1.0.2zh - Denial of Service via Malicious X.509 Certificate Chain with Policy Constraints

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2023-0464. PoCs published by Trinadh465.

AI-analyzed exploit summary The repository appears to be a partial or incomplete OpenSSL source tree with configuration files and some application code, but lacks a clear exploit PoC or demonstration of CVE-2023-0464. No offensive techniques or exploit logic are present.

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.

Exploits (1)

nomisec STUB
by Trinadh465 · poc
https://github.com/Trinadh465/Openssl_1.1.1g_CVE-2023-0464

The repository appears to be a partial or incomplete OpenSSL source tree with configuration files and some application code, but lacks a clear exploit PoC or demonstration of CVE-2023-0464. No offensive techniques or exploit logic are present.

Classification
Stub 90%
Attack Type
Other
Complexity
Theoretical
Reliability
Theoretical
Target: OpenSSL 1.1.1g
No auth needed
Prerequisites: None identified
devstral-2 · analyzed Feb 16, 2026 Full analysis →

Scores

CVSS v3 7.5
EPSS 0.0366
EPSS Percentile 88.2%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-295
Status published
Products (1)
openssl/openssl 1.0.2 - 1.0.2zh
Published Mar 22, 2023
Tracked Since Feb 18, 2026