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. Reported by Viktor Dukhovni.
Fixed in OpenSSL 3.0.7 (git commit) (Affected 3.0.0,3.0.1,3.0.2,3.0.3,3.0.4,3.0.5,3.0.6)
We don’t use any of the affected OpenSSL versions.
Lighthouse – not affected
Lighthouse is not affected by this CVE as we do not use OpenSSL 3 instead we are using OpenSSL 1.1.1.
NetOps Console Servers (OM series) – not affected
NetOps Console Servers are not affected by this CVE as we do not use OpenSSL 3 instead we are using OpenSSL 1.1.1.
Classic Console Servers (IM, CM, ACM series) – not affected
Classic Console Servers are not affected by this CVE as we do not use OpenSSL 3 instead we are using OpenSSL 1.0.1.