"With so many issues addressed by these patches... we expect that we might see some aftershocks," he said. "These issues could easily be exploited leveraging the naivete of inexperience users."
On Tuesday, Microsoft also patched a similarly critical vulnerability in the way Windows Explorer handles Component Object Model objects. Attackers could take over a system by tricking users into visiting a Web site that would then connect them to a remote file server. "This remote file server could then cause Windows Explorer to fail in a way that could allow code execution," Microsoft said.
This vulnerability affects all supported versions of Windows, Microsoft said.
The third critical fix in April's updates addresses a vulnerability in an ActiveX control, called RDS.Dataspace, which is distributed with the Microsoft Data Access Components. This software is included with the Windows operating system and is typically used by database software.
The RDS.Dataspace component problem is rated critical for Windows 98, Windows 2000 and Windows XP. It is considered a moderate risk for Windows Server 2003 users.
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