Adobe Systems Tuesday plugged the Flash Player hole used by a hacker two weeks ago to take down a Windows Vista machine and claim a $5,000 prize in the “PWN To OWN” exploit challenge.
Adobe’s update to Flash Player — the popular program and browser plug-in used to view online content — patched seven vulnerabilities, including several that could be used by attackers to hijack machines running the flawed software. Among the seven was the one used to break into a Fujitsu notebook during the hacker contest sponsored by 3Com’s TippingPoint, which operates a bug bounty program called Zero Day Initiative.
Last week, Adobe claimed it had known about the Flash bug before it was used by Shane Macaulay of Security Objectives to hack one of the laptops up for grabs at CanSecWest, and would add a fix for it to a previously scheduled update this month.
Adobe had announced the April update about four weeks ago, but had left the timeline vague, saying only that it would refresh Flash sometime during the month.
The majority of the patches applied to Flash Player quashed bugs in how the software handled .swf files, the proprietary Shockwave Flash format. One of the .swf vulnerabilities had been reported to Adobe back in December 2007 by Google researcher Rich Cannings, who pointed out the format could be used to launch cross-site scripting attacks, which are commonly deployed by identity thieves and phishers.
Earlier, Adobe had issued updates to its Web developer tools that crank out .swf files, and told Web operators and site designers to make changes to their pages before it released yesterday’s end-user update. If they didn’t get rid of the older .swf files, they risked users being unable to access Flash content on their sites, Adobe warned.
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