Microsoft to patch 64 vulnerabilities

Microsoft had a relatively easy March, having just three bulletins fixing four vulnerabilities. April is a different story, with 17 bulletins being issued, with 64 different vulnerability fixes.

This ties with the ‘most bulletins' since December 2010 and takes the top position for the number of flaws fixed.

Nine bulletins in the list are marked as ‘critical' with all of them carrying a risk of remote code execution. The remaining eight are flagged as important, six of these enable remote code execution, one allows privilege escalation and the remaining one can lead to information disclosure. Seven of the bulletins have forced restarts and the rest of them are possible.

There are patches for Internet Explorer, Office and Windows itself. This time there are patches for other software such as Office Web Apps and Visual Studio. Internet Explorer 9 is immune to the flaws which are affecting V6, V7 and V8. These are being patched next week.

Microsoft have also said that the patches are fixing a MHTML flaw which was discussed in January and an SMB flaw disclosed in February. The full list will be announced by Microsoft next week, but this is what we have so far.

#	Rating	Impact	Affected software
1	Critical	Remote Code Execution	Internet Explorer 6/7/8, Windows XP/2003/Vista/7/2008 R2
2	Critical	Remote Code Execution	Windows XP/2003/Vista/2008/7/2008 R2
3	Critical	Remote Code Execution	Windows XP/2003/Vista/2008/7/2008 R2
4	Critical	Remote Code Execution	Windows XP/2003/Vista/2008/7/2008 R2
5	Critical	Remote Code Execution	Windows XP/2003/Vista/2008/7/2008 R2
6	Critical	Remote Code Execution	Office XP, Windows XP/2003/Vista/2008
7	Critical	Remote Code Execution	Windows XP/2003/Vista/2008/7/2008 R2
8	Critical	Remote Code Execution	Windows XP/2003/Vista/2008/7/2008 R2
9	Critical	Remote Code Execution	Windows XP/2003/Vista/2008/7/2008 R2
10	Important	Remote Code Execution	Excel 2002 (Office XP)/2003/2007/2010, Office for Mac 2004/2008/2011, Excel Viewer, OpenXML File Format Converter for Mac, Office Compatibility Pack
11	Important	Remote Code Execution	PowerPoint Web App, PowerPoint 2002 (Office XP)/2003/2007/2010, Office for Mac 2004/2008/2011, PowerPoint Viewer, PowerPoint Viewer 2007, OpenXML File Format Converter for Mac, Office Compatibility Pack
12	Important	Remote Code Execution	Office XP/2003/2007, Office for Mac 2004/2008, OpenXML File Format Converter for Mac
13	Important	Remote Code Execution	Windows XP/2003/Vista/2008/7/2008 R2
14	Important	Remote Code Execution	Visual Studio .NET 2003/2005/2008/2010, Visual C++ Redistributable 2005/2008/2010
15	Important	Information Disclosure	Windows XP/2003/Vista/2008/7/2008 R2
16	Important	Remote Code Execution	Windows XP/2003
17	Important	Elevation of Privilege	Windows XP/2003/Vista/2008/7/2008 R2

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