Software giant warns of possible worm outbreak following the release of nine Microsoft security patches.

Microsoft has released nine security updates for vulnerabilities in its software products, including three critical fixes for Windows and Internet Explorer. Among the updates is a patch for bugs in two separate components of the Windows operating system that security researchers believe could be exploited by attackers in much the same way that the Zotob family of worms were used two months ago.

The software patches, called updates in Microsoft parlance, were released Tuesday as part of the Redmond, Washington, company's monthly security software release. Two of the critical updates concern Internet Explorer and Microsoft's DirectShow media streaming software. A third update, described in Microsoft Security Bulletin MS05-051, concerns the COM+ services included with Windows as well as the Microsoft Distributed Transaction Coordinator (MSDTC), a component of the operating system that is commonly used by database software to help manage transactions.

It is these last two vulnerabilities that have security researchers concerned because of their similarity to the Windows Plug and Play (PnP) system vulnerability reported last August. Within a week of its disclosure, that flaw was exploited by the authors of the Zotob worm. Variations of this attack eventually knocked hundreds of thousands of machines offline, primarily affecting Windows 2000 users.

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Source : PC World