Microsoft rushes out animated cursor security fix

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Microsoft rushes out animated cursor security fix

Microsoft is to issue an out-of-cycle patch tomorrow for a flaw it revealed last week concerning how Windows treats animated cursor files.

The vulnerability occurs in Windows Vista, Windows 2000 SP4, Windows XP SP2 and some versions of Windows Server 2003.

It can be exploited via email and via websites running the malicious code. Attacks based on the flaw have risen sharply since its discovery last week.

Microsoft had planned to release the patch as part of its monthly update due on 10 April, but the increase in exploits has prompted the firm to release the patch a week early.

Christopher Budd, a security programme manager at Microsoft, said on the company's Security Response Centre Blog: "Over this weekend attacks against this vulnerability have increased somewhat." 

"Due to the increased risk to customers, we were able to expedite our testing to ensure an update for broad distribution sooner than 10 April."

Microsoft claimed that the attacks and customer impact are "limited", but is encouraging users to download the patch as soon as it is made available.

Two unofficial patches have already been released to fix the bug, one from eEye Digital Security and one from the Zeroday Emergency Response Team

Microsoft said that it is working with law enforcement officers to track down attackers.
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