Patch Analysis for September 2011

The five bulletins released by Microsoft today are rated “Important” There are no critical updates. Altogether, 15 vulnerabilities are addressed. Of these, two are publicly disclosed. Both servers and workstations should get attention.

Microsoft reports that WINS handles internal communication on the loopback address in an incorrect way. This could allow a logged on user to take complete control of a server that is running the WINS service by running arbitrary code. The patch released with MS11-070 fixes the problem. It can only be installed if WINS is installed. 

Windows components load external libraries in an incorrect way. It has been publicly disclosed that if the system has a malicious DLL file on the same network directory, it could allow remote code to be executed when a legitimate .rtf, Word document or even a .txt file is opened. All supported versions of Windows are affected. However an exploit requires a user to log on and run the program. Best practice would prevent this. Multiple components are fixed by MS11-071. 

Five vulnerabilities have been privately reported to Microsoft are now addressed in MS11-072. Systems with Office products, including compatibility packs, SharePoint and Web Apps are vulnerable as explained by this update. 

Two more vulnerabilities in Office as indicated in MS11-073. One of these involves the loading of external libraries. Workstations and Terminal Servers are primarily at risk. 

Six vulnerabilities in SharePoint require we give attention to systems running SharePoint, Groove, WebApps and Office Forms. Most vulnerabilities are Cross Site Scripting XSS attacks. IE 8 and 9 include an XSS filter to block these attacks. This is enabled by default and it provides defense-in-depth.

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BulletinExploit Types
/Technologies Affected
System Types AffectedExploit
details public?
/ Being exploited?
MS severity ratingProducts AffectedNotesRandy's recommendation

Privilege elevation

/ Sharepoint
Yes/NoNoImportant Office Sharepoint Server 2007
Groove Server 2007
SharePoint Services 3.0
SharePoint Foundation 2010
SharePoint Server 2007
Groove Server 2010
Web Apps
Groove 2007
Office SharePoint Server 2010
SharePoint Workspace 2010
Office Forms Server 2007
SharePoint Services 2.0
 Patch after testing

Arbitrary code

/ Windows
Terminal Servers
Yes/NoYesImportant XP
Server 2003
Server 2008
Server 2008 R2
Windows 7
 Patch after testing

Arbitrary code

No/NoNoImportant Server 2003
Server 2008
Server 2008 R2
Restart Req'dPatch after testing

Arbitrary code

/ Excel
Terminal Servers
No/NoNoImportant Office 2003
Office 2007
Office 2004 for Mac
Office 2008 for Mac
Comp. Pack for Office 2007
Excel Viewer
Office Sharepoint Server 2007
Open XML Converter for MAC
Office 2010
Office 2011 for MAC
Office Web Apps 2010
Office SharePoint Server 2010
 Patch after testing

Arbitrary code

/ Office
Terminal Servers
No/NoNoImportant Office 2003
Office 2007
Office 2010
 Patch after testing

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