CVE-2022-3996

Summary

If an X.509 certificate contains a malformed policy constraint and policy processing is enabled, then a write lock will be taken twice recursively. On some operating systems (most widely: Windows) this results in a denial of service when the affected process hangs. Policy processing being enabled on a publicly facing server is not considered to be a common setup.

Policy processing is enabled by passing the -policy' argument to the command line utilities or by calling the X509_VERIFY_PARAM_set1_policies()' function.

Update (31 March 2023): The description of the policy processing enablement was corrected based on CVE-2023-0466.

Affected Software

Weaknesses

• CWE-667: CWE-667 Improper Locking

ADP Enrichment

CVE Program Container

Additional References

• https://security.netapp.com/advisory/ntap-20230203-0003/
• https://www.openssl.org/news/secadv/20221213.txt
• https://github.com/openssl/openssl/commit/7725e7bfe6f2ce8146b6552b44e0d226be7638e7

CISA ADP Vulnrichment

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

References

• https://www.openssl.org/news/secadv/20221213.txt
• https://github.com/openssl/openssl/commit/7725e7bfe6f2ce8146b6552b44e0d226be7638e7

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