From: CS_Advisories Mailbox (CS_Advisories_Mailboxsymantec.com)
Date: Mon Apr 03 2006 - 21:02:04 CDT

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                     Symantec Vulnerability Research
                    http://www.symantec.com/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_whitehousesymantec.com
Vendor status: Vendor verified, patch available.
CVE Number : CVE-2006-0559
Reference : http://www.securityfocus.com/bid/16742


Overview:

        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.



Details:

        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
        http://www.mcafeesecurity.com/us/downloads/default.asp
 
        If there are any further questions about this statement, please
        contact McAfee support.
        http://www.mcafeesecurity.com/us/support/technical_support/

Recommendation:

        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.


  CVE-2006-0559


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