Exploit the possiblities


Posted Apr 11, 2006
Authored by Ollie Whitehouse | Site symantec.com

Symantec Vulnerability Research: SYMSA-2006-002- There exists a format string vulnerability within the McAfee WebShield SMTP server which allows an attacker to execute arbitrary code on the host computer via an unauthenticated connection. With successful exploitation, an unauthenticated attacker is able to obtain SYSTEM access.

tags | advisory, arbitrary
MD5 | ef4b165438b1779ee136310b7a68ab5f


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                     Symantec Vulnerability Research  
Security Advisory

Advisory ID : SYMSA-2006-002
Advisory Name: McAfee WebShield SMTP Format String Vulnerability
Release Date : 04-03-2005
Application : McAfee WebShield SMTP 4.5 MR1a
Platform : Microsoft Windows
Severity : System access / remotely exploitable
Author : Ollie Whitehouse / ollie_whitehouse@symantec.com
Vendor status: Vendor verified, patch available.
CVE Number : CVE-2006-0559
Reference : http://www.securityfocus.com/bid/16742


There exists a format string vulnerability within the
McAfee WebShield SMTP server which allows an attacker to execute
arbitrary code on the host computer via an unauthenticated
connection. With successful exploitation, an unauthenticated
attacker is able to obtain SYSTEM access.


A format string vulnerability exists in the function which handles

the construction of the bounce messages for non-existent domains.

On the way into the mail system this causes no problems (correct
usage of the printf() family of functions). However, when the
file ‘(13digitfilename).rcp’ is picked up from the OUT directory
to construct the bounce message, a format string in the original
destination address for the mail will trigger the vulnerability.

Successful exploitation can lead to remote code execution.

Vendor Response:

The above vulnerability was addressed via a patch (P0803) that was

released in August 2003 for Webshield SMTP 4.5 MR1a. This
vulnerability has also been fixed in the latest release of the
product, Webshield SMTP 4.5 MR2.

Licensed and evaluation versions of Webshield SMTP 4.5 MR2 are
available for customer download from the McAfee website at

If there are any further questions about this statement, please
contact McAfee support.


Apply the patch supplied by the vendor.

Common Vulnerabilities and Exposures (CVE) Information:

The Common Vulnerabilities and Exposures (CVE) project has assigned
the following names to these issues. These are candidates for
inclusion in the CVE list (http://cve.mitre.org), which standardizes
names for security problems.


-------Symantec Consulting Services Advisory Information-------

For questions about this advisory, or to report an error:

For details on Symantec's Vulnerability Reporting Policy:

Symantec Vulnerability Research Advisory Archive:

Symantec Vulnerability Research Advisory PGP Key:

-------------Symantec Product Advisory Information-------------

To Report a Security Vulnerability in a Symantec Product:

For general information on Symantec's Product Vulnerability
reporting and response:

Symantec Product Advisory Archive:

Symantec Product Advisory PGP Key:


Copyright (c) 2006 by Symantec Corp.
Permission to redistribute this alert electronically is granted
as long as it is not edited in any way unless authorized by
Symantec Consulting Services. Reprinting the whole or part of
this alert in any medium other than electronically requires
permission from cs_advisories@symantec.com.

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.

Symantec, Symantec products, and Symantec Consulting Services are
registered trademarks of Symantec Corp. and/or affiliated companies
in the United States and other countries. All other registered and
unregistered trademarks represented in this document are the sole
property of their respective companies/owners.


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