K000133706 : OpenSSL vulnerability CVE-2023-0464

Security Advisory 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. (CVE-2023-0464)

Impact

System performance can degrade until the process is forced to restart. This vulnerability allows a remote unauthenticated attacker to cause a degradation of service that can lead to a denial-of-service (DoS) on the BIG-IP Next SPK, BIG-IP Next CNF, or Traffix SDC system.