Microsoft probing Windows 7 zero-day security hole

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Microsoft said on Wednesday it is looking into a report of a vulnerability in Windows 7 and Server 2008 Release 2 that could be used by an attacker to remotely crash the computer. The company is investigating claims of a “possible denial-of-service vulnerability in Windows Server Message Block (SMB),” the Microsoft spokesperson said, adding that the company was unaware of any attacks trying to exploit the hole.

Microsoft Windows 7

The bug triggers an infinite loop on the Server Message Block (SMB) protocol used for sharing files in Windows, researcher Laurent Gaffi wrote in a posting on the Full-Disclosure mailing list and on a blog. “Whatever your firewall is set to, you can get remotely smashed via IE or even via some broadcasting NBNS [NetBIOS Naming Service] tricks,” Gaffi wrote.

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