7.5

CVE-2022-3996: X.509 Policy Constraints Double Locking

Modified
AliasesALPINE-CVE-2022-3996UBUNTU-CVE-2022-3996DEBIAN-CVE-2022-3996
Published 13-12-2022Last modified 03-08-2024

Vulnerability summary

CVE-2022-3996 is a high (CVSS 7.5) Improper Locking vulnerability in openssl. EPSS estimates a 1.31% chance of exploitation in the next 30 days, higher than 70.4% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
1.31%
0%100%
Low · +0.08 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 2 · Related 6
SUSE-SU-2022:4586-1USN-6039-1CGA-625W-VRP6-H2JJCGA-G88V-CPC7-XXQGCGA-VJ4X-MWVP-C5PQCGA-WCJR-7X49-5HJQ

Timeline

  1. 13-12-2022
    PublishedVulnerability first disclosed.
  2. 03-08-2024
    Last modifiedVulnerability information updated.

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.

CVSS metrics

9 scores · 8 sources · 2 versions

EPSS trend

Probability

1.31%

Chance of exploitation in the next 30 days

Percentile

70%

Versus all other CVEs

30-day change

Increase +0.08 pp

From 1.23% on 22-09-2026

22-09-202622-10-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Chainguard3 products
  • openssl< 3.0.7-r1
  • openssl-provider-fips< 3.0.8-r0
  • ruby-3.1All versions (No fix recorded)
Alpine2 products
  • openssl≥ 3.0.0, < 3.0.7-r2
  • openssl3< 3.0.8-r0
Ubuntu2 products
  • edk2All versions (No fix recorded)
  • openssl< 3.0.2-0ubuntu1.9
Wolfi2 products
  • openssl< 3.0.7-r1
  • ruby-3.1All versions (No fix recorded)
Crates.Io1 product
  • openssl-src≥ 300.0.0, < 300.0.12
Debian1 product
  • openssl< 3.0.7-2
Openssl1 product
Opensuse1 product
  • openssl-3&distro=openSUSE Tumbleweed< 3.0.7-2.1

8 vendors · 13 products

References

12 links
Show all 12 references