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Category:   Application (Instant Messaging/IRC/Chat)  >   Microsoft Lync Vendors:   Microsoft
Microsoft Lync HTML Sanitizer Flaw Permits Cross-Site Scripting Attacks
SecurityTracker Alert ID:  1027627
SecurityTracker URL:  http://securitytracker.com/id/1027627
CVE Reference:   CVE-2012-2520   (Links to External Site)
Date:  Oct 9 2012
Impact:   Disclosure of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 2010, 2010 Attendee
Description:   A vulnerability was reported in Microsoft Lync. A remote user can conduct cross-site scripting attacks.

The HTML sanitizer does not properly filter HTML code from user-supplied input. A remote user can 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 potentially sensitive information.

Drew Hintz of Google Security Team reported this vulnerability.

Impact:   A remote user can access potentially sensitive information.
Solution:   The vendor has issued the following fixes:

Microsoft Lync 2010 (32-bit):

http://www.microsoft.com/downloads/details.aspx?familyid=6ea3afea-baa2-4b74-9747-8051c544ddf7

Microsoft Lync 2010 (64-bit):

http://www.microsoft.com/downloads/details.aspx?familyid=670c20e6-4f26-47b9-b6e0-25f195bf7000

Microsoft Lync 2010 Attendee:

http://www.microsoft.com/downloads/details.aspx?familyid=7f98cb55-027a-40bf-b539-d8fa38ffcc83

A restart may be required.

The Microsoft advisory is available at:

http://technet.microsoft.com/en-us/security/bulletin/ms12-066

Vendor URL:  technet.microsoft.com/en-us/security/bulletin/ms12-066 (Links to External Site)
Cause:   Input validation error
Underlying OS:   Windows (Any)

Message History:   None.


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