Firefox update

The update is something of an unusual move for Microsoft and underscores the seriousness of the zero day flaw. The company rarely issues security fixes for its software outside of its regular monthly patch updates.

Meanwhile Mozilla has released a scheduled update for its open source Firefox web browsers for at least 10 different vulnerabilities. The bugs in the browser could have been "used to run attacker code and install software, requiring no user interaction beyond normal browsing," said Mozilla. It is also reissuing calls for users to upgrade from Firefox 2.0 to Firefox 3.0 as soon as possible and said it is "not planning any further security and stability updates for Firefox 2". This means Mozilla will no longer support the Firefox 2 browser against future online scams and attacks.