Typically when Mozilla updates its Firefox browser, it includes a number of security updates. For Firefox 2.0.0.3 and 1.5.11, that number is one. The update also marks the first time Firefox has benefited from an expanded community effort. The one flaw is of the low impact variety and addresses the manner in which Firefox handles a certain FTP (define) command. According to Mozilla's security advisory, a malicious Web page could potentially exploit the PASV (passive) command in FTP to potentially perform a port scan of an internal network.

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