Vulnerability in OpenSSL
CVE-2022-3996
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 · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.013 (68.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 69th percentile — 68.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.012 · newest: 0.013 · change: +0.000
Affected products
- OpenSSL — versions 3.0.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.openssl.org/news/secadv/20221213.txt (vendor-advisory, Vendor Advisory)
- github.com/openssl/openssl/commit/7725e7bfe6f2ce8146b6552b44e0d226be7638e7 (Patch, Third Party Advisory, patch)
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2022-3996?
- CVE-2022-3996 is a high-severity vulnerability in OpenSSL, classified under Improper Locking. CVSS score: 7.5/10. Published 2022-12-13.
- How severe is CVE-2022-3996?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2022-3996 known to be exploited?
- 8 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.