Patch Tuesday Analysis for May 2010

Last week Microsoft alerted us to a possible vulnerability in Sharepoint sites (specifically cross-site scripting or XSS). No patch was released for that today so we expect something in the future-perhaps an out-of-band release. 

Otherwise, the two bulletins this month are rated critical. One is for VBA and Office and the other the Windows platform. 

The VBA related patch (MS10-031) is an unusual situation.  Because VBA is part of Office products but also a separate product that ISV developers can build into their applicaitons to allow their users ability to customize their application.  The developer tool version of Microsoft VBA is sold through Summit Software.  If your company develops software and uses Microsoft VBA you will want to read this one carefully - otherwise just pay attention to bits about Office and VBA. MS10-030 is for a vulnerability in Outlook Express and Windows Mail. The “workaround” suggests using web-based mail instead.  For corporations this shouldn't be an issue anyway since you are probably using Outlook or someother mail client.  You should still patch though incase users are using Windows Mail or Outlook Express to connect to personal accounts. 

BulletinExploit Types
/Technologies Affected
System Types AffectedExploit
details public?
/ Being exploited?
Comprehensive,
practical
workaround
available?
MS severity ratingProducts AffectedNotesRandy's recommendation
MS10-031

978213
Arbitrary code

/ Visual Basic for Applications
Workstations
Terminal Servers
Programmer Workstations
No/NoYesCritical Office XP
Office 2003
Office 2007
Restart may be req'dPatch after testing
MS10-030

978542
Arbitrary code

/ Windows Outlook Express and Mail
Workstations
Terminal Servers
No/NoNoCritical Win2000
XP
Win2003
Vista
Win2008
Windows 7
Win2008 R2
Restart Req'dPatch after testing

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