Microsoft released only four new security bulletins for November's Patch Tuesday, but the main concern is that the zero day flaw exploited by the Duqu worm is not addressed by any of them.



From PCWorld:

Today is Microsoft’s Patch Tuesday for the month of November--the eleventh Patch Tuesday of 2011. It is a light month from Microsoft, with only four security bulletins. The big news, though, is that a zero day flaw being exploited by the Duqu worm is not among the vulnerabilities fixed by Microsoft today.

The addition of four security bulletins this month brings the total for the year so far to 86. Of the four security bulletins, one is rated as Critical, two are Important, and one is ranked as a Moderate threat.

  Microsoft Leaves Duqu Worm Exploit Unpatched