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securityvulnsSecurityvulnsSECURITYVULNS:DOC:12075
HistoryApr 04, 2006 - 12:00 a.m.

SYMSA-2006-002: McAfee WebShield SMTP Format String Vulnerability

2006-04-0400:00:00
vulners.com
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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 / [email protected]
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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Copyright (c) 2006 by Symantec Corp.
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