Worm targeting October Microsoft flaw

A worm out in the wild persuades Microsoft to issue another warning to install an out-of-band patch.

A worm has been detected which is targeting a critical security vulnerability that Microsoft had previously been forced to rush out an out-of-band patch for.

Microsoft said in its latest UK security newsletter that the Worm:Win32/Conficker had been detected across the world, and with increasing frequency.

This worm could exploit the October MS08-067 vulnerability, for which Microsoft chose to release a security patch outside of its normal monthly cycle.

Graham Cluley, Sophos security expert, advised users to apply the fix to any unpatched machines as soon as possible.

He said: "It's always better to do everything possible in advance of a piece of malware being released, rather than mopping up afterwards."

If the vulnerability was successfully exploited, it could allow remote code execution when file sharing was enabled.

Davey Winder blogged about the patch here.

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