CVE-2023-0464

Summary

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.

Affected Software

VendorProductVersion RangeStatus
OpenSSLOpenSSL3.1.0 < 3.1.1affected
OpenSSLOpenSSL3.0.0 < 3.0.9affected
OpenSSLOpenSSL1.1.1 < 1.1.1uaffected
OpenSSLOpenSSL1.0.2 < 1.0.2zhaffected

Weaknesses

  • inefficient algorithmic complexity

ADP Enrichment

CVE Program Container

Additional References

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: yes
    • Technical Impact: partial

References