Detections
Analytics
CVE-2022-3786
high
Description
A 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 a malicious certificate or for an application to continue certificate verification despite failure to construct a path to a trusted issuer. An attacker can craft a malicious email address in a certificate to overflow an arbitrary number of bytes containing the `.' character (decimal 46) on the stack. This buffer overflow could result in a crash (causing a denial of service). 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.
From the Tenable Blog
CVE-2022-3786 and CVE-2022-3602: OpenSSL Patches Two High Severity Vulnerabilities
Published: 2022-11-01
OpenSSL has patched two vulnerabilities, pivoting from its earlier announcement, in version 3.0.7.
References
https://www.tenable.com/cyber-exposure/tenable-2022-threat-landscape-report
https://www.tenable.com/blog/microsofts-november-2022-patch-tuesday-addresses-62-cves-cve-2022-41073
https://www.tenable.com/blog/what-you-should-know-about-the-new-openssl-vulnerability