CyberRota Analysis
AI-GeneratedThe vulnerability affects the CMP/CRMF password-based MAC verifier (PKMacBuilder) in versions of bc-csharp prior to 2.7.0, allowing remote unauthenticated attackers to exploit the lack of resource limits, leading to CPU exhaustion and potential denial of service. This issue arises when a malicious actor sends a CMP message or CRMF certificate request with a large iteration count, overwhelming the system. Organizations using this library should prioritize patching to mitigate the risk of service disruption.
Public Exploit Signal
A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.
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Original NVD Description
Allocation of resources without limits or throttling in the CMP/CRMF password-based MAC verifier (PKMacBuilder) in Legion of the Bouncy Castle Inc. bc-csharp before 2.7.0 allows a remote unauthenticated attacker to cause a denial of service through CPU exhaustion via a CMP message or CRMF certificate request whose PBMParameter declares a very large iteration count, because PKMacBuilder enforced its iteration-count ceiling only when the caller had supplied an explicit maximum through the PKMacBuilder(IPKMacPrimitivesProvider, int) constructor. With any other constructor, ProtectedPkiMessage.Verify and CertificateRequestMessage.IsValidSigningKeyPop performed as many hash iterations as the sender requested, up to about 2^31, before the MAC could be checked.