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Windows flaw attack-code hits the net

Patch or else, warns Microsoft

Tags: attack code, windows flaw, exploit

By Joris Evers

Published: 27 June 2006 08:45 BST

Computer code that exploits a "critical" vulnerability in Windows has been released on the internet, prompting Microsoft to issue a security advisory.

The attack code takes advantage of a flawed Windows routing and remote access component for which Microsoft released a patch two weeks ago, the company said in its advisory published late on Friday. The company is not aware of any actual cyber attacks that use the exploit code, it said.

Microsoft said: "An attacker who successfully exploited this vulnerability could take complete control of the affected system."

It urges users to apply the fix delivered with security bulletin MS06-025, which will remove the vulnerability. "We have confirmed that the exploit code does not affect users who have installed the update," Microsoft said.

However, the MS06-025 fix can interfere with a certain dial-up networking connections, Microsoft said last week. The company advised people who use dial-up scripting or terminal window features not to install the security update while it works on a revised patch. That revision is still in the works, a Microsoft representative said on Monday.

The MS06-025 update was one of a dozen security bulletins that Microsoft released two weeks ago. At least one patch came after the vulnerability it addressed had already been exploited in a cyber attack. Exploits for some other flaws have also been released, further increasing the urgency to patch.

Joris Evers writes for CNET News.com

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