bugtraq - iDefense Security Advisory 02.27.07: Computer Associates eTrust Intrusion Detection Denial of Service Vulnerability

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Message-ID: <45E49F20.9000902@idefense.com>
Date: Tue, 27 Feb 2007 16:14:08 -0500
From: iDefense Labs <labs-no-reply@...fense.com>
To: vulnwatch@...nwatch.org, full-disclosure@...ts.grok.org.uk,
	bugtraq@...urityfocus.com
Subject: iDefense Security Advisory 02.27.07: Computer Associates eTrust Intrusion
 Detection Denial of Service Vulnerability

Computer Associates eTrust Intrusion Detection Denial of Service
Vulnerability

iDefense Security Advisory 02.27.07
http://labs.idefense.com/intelligence/vulnerabilities/
Feb 27, 2007

I. BACKGROUND

Computer Associates eTrust Intrusion Detection is a network intrusion
management and prevention system, that includes real-time session
monitoring and Internet web filtering capabilities. More information can
be found on the vendors site at the following URL.

http://www3.ca.com/solutions/Product.aspx?ID=163

II. DESCRIPTION

The eTrust Intrusion Detection process listens on TCP port 9191 for remote
administration functions. Administrator login requires that keys be
exchanged including a session key with blowfish encryption of the login
and the password.

Since the administration server fails to properly validate the key length
value, it is possible to cause the product to crash. During decryption, 4
is subtracted from the specified length and the result used as the length
of the data to decrypt. The decryption loop will proceed to overwrite the
entire heap segment. This leads to an unhandled exception.

III. ANALYSIS

Exploitation of this vulnerability allows attackers to cause the
administration
service to crash.

Since the heap is not used once corrupted, the heap overflow cannot be
exploited for more than a denial of service.

IV. DETECTION

iDefense has confirmed this vulnerability in Computer Associates eTrust
Intrusion Detection version 3.0.5.57. Other versions are suspected
vulnerable.

V. WORKAROUND

iDefense is not aware of any workarounds for this issue.

VI. VENDOR RESPONSE

Computer Associates has issued patches to correct this vulnerability. More
information is available in their advisory which can be found at the
following
URL.

http://supportconnectw.ca.com/public/ca_common_docs/eid_secnotice.asp

VII. CVE INFORMATION

The Common Vulnerabilities and Exposures (CVE) project has assigned the
name CVE-2007-1005 to this issue. This is a candidate for inclusion in
the CVE list (http://cve.mitre.org/), which standardizes names for
security problems.

VIII. DISCLOSURE TIMELINE

01/16/2007  Initial vendor notification
01/16/2007  Initial vendor response
02/27/2007  Coordinated public disclosure

IX. CREDIT

The discoverer of this vulnerability wishes to remain anonymous.

Get paid for vulnerability research
http://labs.idefense.com/methodology/vulnerability/vcp.php

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http://labs.idefense.com/

X. LEGAL NOTICES

Copyright © 2007 iDefense, Inc.

Permission is granted for the redistribution of this alert electronically.
It may not be edited in any way without the express written consent of
iDefense. If you wish to reprint the whole or any part of this alert in
any other medium other than electronically, please e-mail
customerservice@...fense.com for permission.

Disclaimer: The information in the advisory is believed to be accurate at
the time of publishing based on currently available information. Use of
the information constitutes acceptance for use in an AS IS condition.
There are no warranties with regard to this information. Neither the
author nor the publisher accepts any liability for any direct, indirect,
or consequential loss or damage arising from use of, or reliance on, this
information.