Two 'critical' bulletins planned for April 2013 Patch Tuesday

Brandan Blevins, Assistant Site Editor

Microsoft's April 2013 Patch Tuesday release will include nine bulletins -- two of them rated 'critical' and the rest deemed 'important' -- affecting Microsoft Windows, Internet Explorer, Microsoft Office, Microsoft Server Software and Microsoft Security Software, the software giant announced Thursday.

Bulletin 1, rated critical, addresses remote code execution vulnerabilities present in Internet Explorer (IE) 10 on Windows 8, IE 8 and 9 for Windows 7, IE 7 and 8 on Windows Vista and IE 6, 7 and 8 on Windows XP. It will require a restart.

Bulletin 2, also deemed critical, addresses remote code execution vulnerabilities in Windows XP, Vista and Windows 7, though notably not Windows 8. It may require a restart.

Bulletin 3 addresses a vulnerability only present in Microsoft SharePoint Server 2013, and may require a restart. If successfully exploited, this vulnerability would lead to information disclosure issues.

Bulletins 4, 6, 7, 8 and 9 deal with privilege escalation vulnerabilities in Windows, the built-in Windows Defender antivirus program for Windows 8 and RT, Microsoft Office Apps 2012 Service Pack 1, Microsoft SharePoint Server 2010 Service Pack 1 and Microsoft Groove Server 2010 Service Pack 1.

The bulletins are scheduled to be released April 9.