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Category:   Application (E-mail Server)  >   Microsoft Outlook Web Access Vendors:   Microsoft
Microsoft Outlook Web Access Input Validation Hole Permits Cross-Site Scripting Attacks
SecurityTracker Alert ID:  1016280
SecurityTracker URL:  http://securitytracker.com/id/1016280
CVE Reference:   CVE-2006-1193   (Links to External Site)
Updated:  Jun 13 2006
Original Entry Date:  Jun 13 2006
Impact:   Disclosure of authentication information, Disclosure of user information, Execution of arbitrary code via network, Modification of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): Affects Exchange 2000 (SP3), 2003 (SP1), 2003 (SP2)
Description:   A vulnerability was reported in Microsoft Outlook Web Access. A remote user can conduct cross-site scripting attacks.

The software does not properly filter HTML code from user-supplied e-mail messages before displaying the input. A remote user can create a specially crafted e-mail that, when viewed 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 Outlook Web Access software and will run in the security context of that site. As a result, the code will be able to access the target user's cookies (including authentication cookies), if any, associated with the site, access data recently submitted by the target user via web form to the site, or take actions on the site acting as the target user.

Scripting code can be injected into attachments. HTML code can be injected into attachments and the message body.

The following versions are affected:

- Microsoft Exchange 2000 Server Pack 3 with the August 2004
- Exchange 2000 Server Post-Service Pack 3 Update Rollup
- Microsoft Exchange Server 2003 Service Pack 1
- Microsoft Exchange Server 2003 Service Pack 2

The vendor was notified on October 27, 2005.

D. Fabian and T. Kerbl of SEC-CONSULT discovered this vulnerability.

The original advisory is available at:

http://www.sec-consult.com/fileadmin/Advisories/20060613-0_owa_xss_noexploit.txt

Impact:   A remote user can access the target user's cookies (including authentication cookies), if any, associated with the site running the Microsoft Outlook Web Access software, access data recently submitted by the target user via web form to the site, or take actions on the site acting as the target user.
Solution:   The vendor has issued the following fixes:

Microsoft Exchange 2000 Server Pack 3 with the August 2004 Exchange 2000 Server Post-Service Pack 3 Update Rollup:

http://www.microsoft.com/downloads/details.aspx?FamilyId=746CE64E-3186-422B-A13B-004E7942189B

Microsoft Exchange Server 2003 Service Pack 1:

http://www.microsoft.com/downloads/details.aspx?FamilyId=0E192781-847F-41C1-B32A-84218DB60942

Microsoft Exchange Server 2003 Service Pack 2:

http://www.microsoft.com/downloads/details.aspx?FamilyId=C777BC9F-52B7-4F17-96C7-DAF3B9987D70

A restart is not required.

The vendor's advisory is available at:

http://www.microsoft.com/technet/security/bulletin/ms06-029.mspx

Vendor URL:  www.microsoft.com/technet/security/bulletin/ms06-029.mspx (Links to External Site)
Cause:   Input validation error
Underlying OS:  Windows (2000), Windows (2003)

Message History:   None.


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