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Computer Associates Alert Notification Service Multiple RPC Buffer Overflow Vulnerabilities

04.03.08

BACKGROUND

Computer Associates Alert Notification Server is used by several CA products, including eTrust Integrated Threat Management, to provide notifications to console users.

DESCRIPTION

Remote exploitation of multiple buffer overflow vulnerabilities in Computer Associates International Inc.'s Alert Notification Service may allow an authenticated attacker to execute arbitrary code with SYSTEM privileges.

The Alert Service is a component of multiple Computer Associates' products. It is used to provide status updates and notifications regarding various system events. It implements an RPC interface with GUID 3d742890-397c-11cf-9bf1-00805f88cb72.

Multiple buffer overflows exist in the handlers for various opcodes. In each case, unsafe library functions are used to copy attacker supplied data into fixed size stack buffers. By making specially crafted requests, attackers are able to cause an exploitable buffer overflow.

ANALYSIS

Exploitation of these vulnerabilities allows an attacker to execute arbitrary code with SYSTEM privileges. In order to exploit these vulnerabilities, it is necessary for an attacker to have valid domain credentials.

DETECTION

iDefense confirmed the existence of these vulnerabilities with Computer Associates' Threat Manager for the Enterprise version 8.1. Other products that contain the Alert Notification Service are suspected to be vulnerable as well.

WORKAROUND

iDefense is currently unaware of any effective workaround for these issues.

VENDOR RESPONSE

Computer Associates has addressed these issues by providing updates. More information is available in their advisory at the following URL.

https://support.ca.com/irj/portal/anonymous/phpsupcontent?contentID=173103

CVE INFORMATION

The Common Vulnerabilities and Exposures (CVE) project has assigned the name CVE-2007-4620 to this issue. This is a candidate for inclusion in the CVE list (http://cve.mitre.org/), which standardizes names for security problems.

DISCLOSURE TIMELINE

08/24/2007 Initial vendor notification
08/24/2007 Initial vendor response
04/03/2008 Coordinated public disclosure

CREDIT

The discoverer of these vulnerabilities wishes to remain anonymous.

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LEGAL NOTICES

Copyright © 2008 Verisign, Inc.

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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.