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The trend toward non-OS vulnerabilities has been increasing in recent months thanks to a combination of Microsoft (Quote) hardening the operating system and the advent of "fuzzers," hacker programs that automate searching for vulnerabilities, like buffer overflows. This allows less technically-savvy people to search for exploits.
"Typically attackers will focus on the low hanging fruit. The OS was a target all of these years, but with all of these service packs and patches, it has become increasingly harder to find weaknesses," Amol Sarwate, manager of the vulnerabilities lab for security vendor Qualys told internetnews.com.
Also, some of these applications are newer and haven't been as widely tested. Among the dirty dozen of security problems, one of the most glaring is in the Microsoft Malware Protection Engine. This single engine powers Windows Defender, Live One Care and Antigen, which guards the Exchange and Sharepoint servers.
"Can you imagine sending a PDF into an Exchange server and it gets scanned and you can exploit the Exchange server? It's obviously critical," said Jonathan Bitle, manager of the technical account management team at Qualys.
Of the six Windows-related fixes, two are labeled Critical, the most severe, and four are listed as Important. There is one Critical fix for Internet Explorer, a Critical fix for Office and Microsoft Works, and an Important fix for Microsoft Step-by-Step Interactive Training.
As part of the update, Microsoft has updated its Malicious Software Removal Tool to remove two more viruses; Win32/Stration and Win32/Mitglieder.