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CERT Coordination Center

Multiple vulnerabilities in Internet Key Exchange (IKE) version 1 implementations

Vulnerability Note VU#226364

Original Release Date: 2005-11-17 | Last Revised: 2006-01-03

Overview

Numerous vulnerabilities have been reported in various Internet Key Exchange version 1 (IKEv1) implementations. The impacts of these vulnerabilities may allow an attacker to execute arbitrary code, cause a denial-of-service condition, or cause an IKEv1 implementation to behave in an unstable/unpredictable manner.

Description

The U.K. National Infrastructure Security Co-ordination Center (NISCC) and CERT-FI have reported numerous vulnerabilities in IKEv1 implementations. The IKE protocol (RFC 2409) operates within the framework of the Internet Security Association (SA) and Key Management Protocol (ISAKMP, RFC 2408) and provides a way for nodes to authenticate each other and exchange keying material that is used to establish secure network services. IKE is commonly used by IPSec-based VPNs. The IKE negotiation process consists of two phases. Phase 1 establishes an ISAKMP SA. Phase 2 is used to create SAs for other security protocols.

These vulnerabilities were discovered using the PROTOS Test Tool developed by Oulu University Secure Programming Group (OUSPG). The results of the tests are described in NISCC Vulnerability Advisory 273756/NISCC/ISAKMP. According to that advisory, many IKEv1 implementations contain buffer overflow, format string, and other unspecified vulnerabilities in phase 1 of IKEv1. Exploitation of these vulnerabilities may allow a remote attacker to compromise a system's security.

Impact

These vulnerabilities may allow a remote attacker to execute arbitrary code, cause a denial-of-service condition, gain access to sensitive information, or cause an IKEv1 implementation to behave in an unstable/unpredictable manner. In addition, many of these vulnerabilities may be exploited remotely by sending a specially crafted packet to a vulnerable IKEv1 installation.

Solution

Apply a patch from an affected product vendor

Vendor Information

226364
 

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References

Acknowledgements

These vulnerabilities were reported by NISCC and CERT-FI

This document was written by Jeff Gennari.

Other Information

CVE IDs: None
Severity Metric: 16.54
Date Public: 2005-11-14
Date First Published: 2005-11-17
Date Last Updated: 2006-01-03 15:39 UTC
Document Revision: 43

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