"Symantec is warning of a sharp jump in online attacks that appear to be targeting a recently patched bug in Microsoft's Windows operating system, an analysis that some other security companies disputed. Symantec raised its Threat Con security alert level from one to two because of the attacks, with two denoting 'increased alertness.' The attacks spotted by Symantec target a flaw in the Windows Server Service that Microsoft says could be exploited to create a self-copying worm attack."