CyberRota Analysis
AI-GeneratedImproper certificate validation in the PkixNameConstraintValidator component of Bouncy Castle's bc-csharp library allows attackers controlling a name-constrained intermediate CA to bypass PKIX certification path validation. This vulnerability can lead to unauthorized acceptance of certificates for email addresses, DNS names, or URI hosts that should be excluded, potentially enabling man-in-the-middle attacks. Organizations using affected versions of this library should prioritize patching to mitigate the risk of exploitation.
Public Exploit Signal
A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.
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Original NVD Description
Improper certificate validation in PkixNameConstraintValidator in Legion of the Bouncy Castle Inc. bc-csharp before 2.7.0 allows an attacker who controls, or can obtain certificates from, a name-constrained intermediate CA to have certificates accepted during PKIX certification path validation for email addresses, DNS names or URI hosts that lie within excluded subtrees applying to that CA, via an rfc822Name, dNSName or uniformResourceIdentifier name whose host ends with a dot, because names and constraints were compared without first removing the RFC 1034 root-label trailing dot, so a fully qualified host name did not match an excluded subtree for the same host written without the dot.