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KAME Racoon IKE daemon fails to properly verify client RSA signatures

Vulnerability Note VU#552398

Original Release Date: 2004-04-09 | Last Revised: 2004-04-09


The KAME Racoon IKE daemon fails to properly verify client RSA signatures when using Main or Aggressive Mode during a Phase 1 IKE exchange.


Racoon is an IKE Key Management daemon that negotiates and configures a set of parameters for IPSec. When authenticating a peer in Phase 1 of an IKE exchange, Racoon can use pre-shared keys, RSA signatures, or GSS-API. When using RSA signatures for authentication, Racoon validates the X.509 certificate, but fails to verify the client RSA signature.


An attacker with access to a trusted X.509 certificate can conduct a man-in-the-middle attack or establish an authenticated IPSec connection using any private key to generate the RSA signature.


Apply Patch

Apply a patch as specified by your vendor. If a patch is unavailable, KAME has released a patch that is available in their CVS repository at:

Vendor Information


KAME Project Affected

Updated:  April 09, 2004



Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.


Please refer to the KAME CVS entry for "crypto_openssl.c".

If you have feedback, comments, or additional information about this vulnerability, please send us email.

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This vulnerability was reported by Ralf Spenneberg.

This document was written by Damon Morda.

Other Information

CVE IDs: CVE-2004-0155
Severity Metric: 8.58
Date Public: 2004-04-07
Date First Published: 2004-04-09
Date Last Updated: 2004-04-09 20:43 UTC
Document Revision: 27

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