Internet Explorer exploited
Date: March 26, 2006Source: TechWeb News
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"We just received a report that a particular site uses the vulnerability to install a spybot variant," the SANS Institute's Internet Storm Center (ISC) warned Friday in an alert. "It is a minor site with insignificant visitor numbers according to Netcraft's 'Site rank.'"
Disclosed only Wednesday, the flaw in IE 5.01, 6.0, and the January version of IE 7 Beta 2 Preview has security vendors worried because a patch isn't available from Microsoft. Thursday, as news circulated that a working exploit had been publicly posted, Microsoft said it was working on a fix.
Even before the site exploiting the CreateTextRange bug was discovered, security companies had raised alarms. The ISC bumped up its InfoCON level to "yellow" for the first time since the Windows Metafile fiasco in late December, when another "zero-day" flaw hit Windows users.
"It's a relatively trivial mod[ification] to turn [the exploit] into something more destructive," the ISC warned. "For that reason, we're raising Infocon to yellow for the next 24 hours."
Symantec raised its ThreatCon status indicator to "2" and boosted its Internet Threat Meter's warning for Web activities to "medium" because of the bug.
Although it's unclear exactly whether the Spybot-distributing site is drawing users to its poison or simply waiting for the unwary to stumble across the URL, it's likely the former, Scott Carpenter, director of security at Secure Elements, said in an e-mail to TechWeb. "The most probable vector for this worm will be in the form of spam with malicious links that will tempt users into clicking on a link that takes them to a malicious site."
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