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Category:   Application (Instant Messaging/IRC/Chat)  >   Microsoft Lync Vendors:   Microsoft
Microsoft Lync Server Input Validation Flaw Permits Cross-Site Scripting Attacks
SecurityTracker Alert ID:  1030381
SecurityTracker URL:  http://securitytracker.com/id/1030381
CVE Reference:   CVE-2014-1823   (Links to External Site)
Date:  Jun 10 2014
Impact:   Disclosure of user information, Execution of arbitrary code via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): Server 2010, 2013
Description:   A vulnerability was reported in Microsoft Lync Server. A remote user can conduct cross-site scripting attacks.

The server does not properly filter HTML code from user-supplied input before displaying the input. A remote user can create a specially crafted URL containing a valid Lync meeting ID that, when loaded by a target user, will cause arbitrary scripting code to be executed by the target user's browser. The code will originate from the site running the Microsoft Lync software and will run in the security context of that site. As a result, the code will be able to access data recently submitted by the target user via web form to the site.

Impact:   A remote user can access data recently submitted by the target user via web form to the site.
Solution:   The vendor has issued the following fixes:

Microsoft Lync Server 2010:

http://www.microsoft.com/downloads/details.aspx?familyid=b75d1d77-c4c9-4f90-b76e-0b4796a62d95

Microsoft Lync Server 2013:

http://www.microsoft.com/downloads/details.aspx?familyid=55a61b7b-45f9-4ed3-83b9-2fa6ee7295fb

A restart is not required.

The Microsoft advisory is available at:

https://technet.microsoft.com/library/security/ms14-032

Vendor URL:  technet.microsoft.com/library/security/ms14-032 (Links to External Site)
Cause:   Input validation error
Underlying OS:  Windows (Any)

Message History:   None.


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