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.
Published 2022-12-13 16:15:22
Updated 2023-03-31 10:15:06
View at NVD,   CVE.org
Vulnerability category: Denial of service

Exploit prediction scoring system (EPSS) score for CVE-2022-3996

Probability of exploitation activity in the next 30 days: 0.10%

Percentile, the proportion of vulnerabilities that are scored at or less: ~ 42 % EPSS Score History EPSS FAQ

CVSS scores for CVE-2022-3996

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source
7.5
HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.9
3.6
NIST

CWE ids for CVE-2022-3996

  • The product does not properly acquire or release a lock on a resource, leading to unexpected resource state changes and behaviors.
    Assigned by:
    • nvd@nist.gov (Primary)
    • openssl-security@openssl.org (Secondary)

References for CVE-2022-3996

Products affected by CVE-2022-3996

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