Internet flaw leads to security fears

Computer experts have accidentally discovered a flaw in the way the internet works leading to the biggest security update in the history of the world wide web. The glitch allows hackers and net criminals to direct users to fake web pages where they can access personal information.

The bug in the Domain Name System was discovered by internet security expert Dan Kaminsky earlier this year. New software has been released to tackle the problem known as "cache poisoning", with internet giant Microsoft announcing that it will distribute a patch to deal with the bug.

Fixing the glitch will largely be the work of the companies that operate the millions of server farms which form the backbone of the internet, but users are advised to update their security software to prevent phishing. The Microsoft patch is available here.

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