CVE-2023-0464

Public on 2023-03-22
Modified on 2024-05-17
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.
Severity
Medium severity
Medium
CVSS v3 Base Score
5.3
See breakdown

Affected Packages

Platform Package Release Date Advisory Status
Amazon Linux 2 - Core edk2 2024-03-13 ALAS2-2024-2502 Fixed
Amazon Linux 1 openssl 2023-06-05 ALAS-2023-1762 Fixed
Amazon Linux 2 - Core openssl 2023-06-05 ALAS2-2023-2073 Fixed
Amazon Linux 2023 openssl 2023-05-11 ALAS2023-2023-181 Fixed
Amazon Linux 2 - Openssl-snapsafe Extra openssl-snapsafe 2023-07-17 ALAS2OPENSSL-SNAPSAFE-2023-002 Fixed
Amazon Linux 2 - Core openssl11 2023-05-11 ALAS2-2023-2039 Fixed

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
NVD CVSSv3 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H