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CVE-2022-3786

X.509 Email Address Variable Length Buffer Overflow

Impact

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.

Affected packages

EcosystemPackageAffectedFixed in
rustopenssl-src>= 300.0.0, < 300.0.11300.0.11

Affected products

VendorProductAffected versions
OpensslOpenssl
from 3.0.0 before 3.0.7
FedoraprojectFedora
Versions 36, 37
NodejsNode.Js
from 18.0.0 before 18.11.0
Versions 18.12.0, 19.0.0

Weakness classification

CWE-120

References