Microsoft Patch Tuesday Closes Two Zero-Days

eSecurity Planet looks at the year’s final Patch Tuesday release, which sees Microsoft clamping down on two zero-day vulnerabilities impacting older versions of its software — including a threat identified last month.

Microsoft today issued six patches in its final Patch Tuesday release for 2009, fixing a total of a dozen security holes — six of them rated as “critical,” the highest level on Microsoft’s threat severity scale.

The company last Thursday gave IT administrators a heads-up when it gave advance notice of the bugs it planned to address in today’s installment of its monthly batch of fixes.

At the time, and as typical in the run-up to Patch Tuesday, Microsoft (NASDAQ: MSFT) disclosed only few details of the vulnerabilities it expected to target.

However, it did single out one fix in particular, which security analysts today urge admins to apply swiftly: a so-called cumulative update to Internet Explorer.

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