Microsoft Lync Server 2010 'ReachJoin.aspx' Remote Command Injection Vulnerability

Bugtraq ID:	48235
Class:	Input Validation Error
CVE:
Remote:	Yes
Local:	No
Published:	Jun 13 2011 12:00AM
Updated:	Jun 13 2011 12:00AM
Credit:	Mark Lachnie
Vulnerable:	Microsoft Lync 2010 4.0.7577.0
Not Vulnerable:

Microsoft Lync Server 2010 'ReachJoin.aspx' Remote Command Injection Vulnerability

Microsoft Lync Server 2010 is prone to a remote command-injection vulnerability because it fails to properly sanitize user-supplied input.

Attackers can exploit this issue to execute arbitrary commands in the context of the application.

Microsoft Lync Server 2010 version 4.0.7577.0 is vulnerable; other versions may also be affected.

Microsoft Lync Server 2010 'ReachJoin.aspx' Remote Command Injection Vulnerability

Attackers can exploit this issue using readily available tools.

The following example URI is available:

https://www.example.com/Reach/Client/WebPages/ReachJoin.aspx?xml=&&reachLocale=en-us%22;var%20xxx=%22http://www.foofus.net/~bede/foofuslogo.jpg%22;open%28xxx%29;alert%28%22error,%20please%20enable%20popups%20from%20this%20server%20and%20reload%20from%20the%20link%20you%20were%20given%22%29//

Microsoft Lync Server 2010 'ReachJoin.aspx' Remote Command Injection Vulnerability

Solution:
The vendor released an update. Please see the references for details.

Microsoft Lync Server 2010 'ReachJoin.aspx' Remote Command Injection Vulnerability

References:

• Microsoft Homepage (Microsoft)
  
• Microsoft Knowledge Based Article 2500441 (Microsoft)
  
• Javascript Injection in Microsoft Lync 4.0.7577.0 (bede)