Oops, IE 0day causes problems.

[Gary]

One of the most sensitive science labs in the US has shut down all internet access after attackers exploited a vulnerability in Microsoft's Internet Explorer browser to steal data from some of its servers, according to published news reports.

The security breach at the Oak Ridge National Laboratory is at least the second time since 2007 that computers have been hacked when employees were duped by phishing emails. The most recent compromise was initiated by messages that were manipulated so that they appeared to come from the lab's Human Resource Department, The Knoxville News Sentinel reported.

According to a follow-up post, a link included in the fraudulent email, which first entered the lab's systems on April 7, exploited a critical vulnerability in IE that Microsoft fixed last Tuesday. It was the same bug that fetched a security researcher a $15,000 prize in the recent Pwn2Own hacking contest.

http://www.theregister.co.uk/2011/04/19/us_lab_security_breach/