CVE-2022-4203

Aliases:GHSA-w67w-mw4j-8qrvRUSTSEC-2023-0008
Advisory lineage Upstream: 0 Downstream: 9
Modified
Published: 24 Feb 2023, 14:53
Last modified:04 Nov 2025, 19:14

Vulnerability Summary

Overall Risk (default)
low
20/100
CVSS Score
4.9 MEDIUM
v3.1 (cve.org)
EPSS Score
0.5% LOW
0% probability -0.15%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

24 Feb 2023, 14:53
Published
Vulnerability first disclosed
04 Nov 2025, 19:14
Last Modified
Vulnerability information updated

Description

A read buffer overrun can be triggered in X.509 certificate verification, specifically in name constraint checking. Note that this occurs after certificate chain signature verification and requires either a CA to have signed the malicious certificate or for the application to continue certificate verification despite failure to construct a path to a trusted issuer. The read buffer overrun might result in a crash which could lead to a denial of service attack. In theory it could also result in the disclosure of private memory contents (such as private keys, or sensitive plaintext) although we are not aware of any working exploit leading to memory contents disclosure as of the time of release of this advisory. In a TLS client, this can be triggered by connecting to a malicious server. In a TLS server, this can be triggered if the server requests client authentication and a malicious client connects.

CVSS Metrics

  • v3.1•MEDIUM•Score: 4.9CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
  • v3.1•CRITICAL•Score: 9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

EPSS Trends

Current EPSS score: 0.50%• Percentile: 66%

Techniques & Countermeasures

  • CWE-125•Out-of-bounds Read

    The product reads data past the end, or before the beginning, of the intended buffer.

Affected Systems

  • Crates.Io•openssl-src

    ≥ 300.0.0, < 300.0.12

  • Unknown•OpenSSL

    ≥ 3.0.0, < 3.0.8

References (7)