CVE-2022-3996

X.509 Policy Constraints Double Locking

Description

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.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.18%
Vendor Advisory openssl.org
Affected: OpenSSL OpenSSL
Published at:
Updated at:

References

Link Tags
https://www.openssl.org/news/secadv/20221213.txt vendor advisory
https://github.com/openssl/openssl/commit/7725e7bfe6f2ce8146b6552b44e0d226be7638e7 third party advisory patch
https://security.netapp.com/advisory/ntap-20230203-0003/

Frequently Asked Questions

What is the severity of CVE-2022-3996?
CVE-2022-3996 has been scored as a high severity vulnerability.
How to fix CVE-2022-3996?
To fix CVE-2022-3996, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2022-3996 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2022-3996 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2022-3996?
CVE-2022-3996 affects OpenSSL OpenSSL.
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