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"Internet Explorer, everybody knows, is not very secure. But Firefox is also fairly insecure," said Spiegelmock, who in everyday life works at blog company SixApart. He detailed the flaw, showing a slide that displayed key parts of the attack code needed to exploit it.
The flaw is specific to Firefox's implementation of JavaScript, a 10-year-old scripting language widely used on the Web. In particular, various programming tricks can cause a stack overflow error, Spiegelmock said. The implementation is a "complete mess," he said. "It is impossible to patch."
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Exploitation of security holes prompts users and vendors to close those holes, vendors to emphasize security in system development, and users to adopt improved security practices. This constant strengthening of security reduces the likelihood of a catastrophic attack -- one that would threaten national or even global security [...] Current federal law, however, does not properly value such strategic goals.