Well-known bug hunter Michal Zalewski, who uses the online alias "Icamtuf," released a web browser fuzzing tool that identified about 100 vulnerabilities in various browsers. One of those - a potentially exploitable zero-day vulnerability in Microsoft's Internet Explorer (IE) browser - may have been discovered by hackers in China, he said. The tool, called "crossjuzz," also found flaws affecting Firefox, Opera and other browsers that use the open-source web browser engine WebKit.
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