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             AUSCERT External Security Bulletin Redistribution

                          ESB-2009.0441 -- [Win]
            NuPoint Messenger server: Access Confidential Data
                                7 May 2009


        AusCERT Security Bulletin Summary

Product:              NuPoint Messenger server
Publisher:            US-CERT
Operating System:     Windows
Impact:               Access Confidential Data
Access:               Remote/Unauthenticated

Original Bulletin:    http://www.kb.cert.org/vuls/id/576996

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Vulnerability Note VU#576996

NuPoint Messenger server transmits authentication credentials in plain text


NuPoint Messenger is a unified communications product that connects to a Microsoft 
Exchange server. When communicating with the mail server the NuPoint Messenger 
server transmits Exchange usernames and passwords in cleartext.

I. Description

The NuPoint Messenger server can connect to a Microsoft Exchange server via the 
IMAP or MAPI protocols. During the authentication process, the NuPoint server 
will send user domain authentication credentials in cleartext to the Exchange 
server. Older versions of the NuPoint Messenger product may transmit the 
NuPoint server's root password without encryption instead of individual 
usernames and passwords. Administrators are encouraged review the "NuPoint 
communication with MS Exchange" document for more information.

II. Impact

An attacker with access to network data may be able to obtain domain (Exchange) 
usernames and passwords.

III. Solution

There is no solution to this issue. Administrators are encourgaed to review the 
below workarounds to mitigate the impact of this vulnerability.

Encrypt connections between NuPoint and Exchange Servers

    * If the MAPI protocol is enabled, connections from the NuPoint server will 
      be encrypted.
    * Using IPSec or some other VPN technology to encrypt the connection 
      between the NuPoint and Exchange server will mitigate this vulnerability.

Restrict access

The NuPoint Messenger server should not use IMAP to connect to remote Exchange 
servers. If IMAP is enabled, the NuPoint server should be directly connected to 
the same isolated network as the Exchange server that it is communicating with.

Systems Affected

Vendor	                Status	        Date Notified	Date Updated
Mitel Networks, Inc.	Vulnerable	2009-04-30	2009-05-05


Simon Laurin of Simon Laurin Services-Conseils inc. reported this issue and 
provided valuable feedback. Mitel provided technical information that was used 
in this report.

This document was written by Ryan Giobbi.
Other Information
Date Public:	          2008-12-04
Date First Published:	  2009-05-06
Date Last Updated:	  2009-05-06
CERT Advisory:	 
US-CERT Technical Alerts:	 
Metric:	                  1.80
Document Revision:	  23

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