Security researchers at Microsoft Corp. Tuesday warned of a significant climb in exploits of a Windows bug it patched with an emergency fix last month, confirming earlier reports by Symantec Corp.
Microsoft again urged users to apply the MS08-067 patch if they have not already done so.
The new attacks, which Microsoft's Malware Protection Center said began over the weekend but spiked in the past two days, use the same worm Symantec first spotted last Friday.
Dubbed "Conficker.a" by Microsoft and "Downadup" by Symantec, the worm exploits the vulnerability in the Windows Server service, used by all versions of the operating system to connect to file and print servers on a network. Microsoft patched the bug in an out-of-cycle update five weeks ago after it discovered a small number of infected PCs, most of them in Southeast Asia.
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