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Category:   Application (Security)  >   IPsec-Tools Vendors:
IPSec-tools IKE Processing Lets Remote Users Deny Service
SecurityTracker Alert ID:  1015254
SecurityTracker URL:
CVE Reference:   CVE-2005-3732   (Links to External Site)
Date:  Nov 22 2005
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): prior to 0.6.3
Description:   A vulnerability was reported in IPsec-Tools. A remote user can cause denial of service conditions.

The Internet Key Exchange version 1 (IKEv1) implementation does not properly process IKE packets when in aggressive mode. A remote user can send specially crafted IKE packets to trigger a null pointer dereference and cause the IKE service to crash.

The flaw resides in 'isakmp_agg.c'.

A test suite developed by the University of Oulu Secure Programming Group (OUSPG) was used to discover these vulnerabilities.

Impact:   A remote user can cause denial of service conditions on the target system.
Solution:   The vendor has issued a source code fix, available via CVS:

The vendor has also issued a fixed version (0.6.3).

Vendor URL: (Links to External Site)
Cause:   Boundary error, Exception handling error
Underlying OS:  Linux (Any), UNIX (Any)

Message History:   This archive entry has one or more follow-up message(s) listed below.
Apr 26 2006 (Red Hat Issues Fix) IPSec-tools IKE Processing Lets Remote Users Deny Service
Red Hat has released a fix for Red Hat Enterprise Linux 3 and 4.

 Source Message Contents

Subject:  Potential DoS fixed in ipsec-tools


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