Osirys has discovered a vulnerability in PHPbbBook, which can be exploited by malicious people to disclose sensitive information.
Input passed to the "l" parameter in bbcode.php is not properly verified before being used to include files. This can be exploited to include arbitrary files from local resources via directory traversal attacks and URL-encoded NULL bytes.
Successful exploitation of this vulnerability requires that "magic_quotes_gpc" is disabled.
This vulnerability is confirmed in version 1.3h. Other versions may also be affected.
Solution: Edit the source code to ensure that input is properly verified.
Provided and/or discovered by: Osirys
Original Advisory: http://milw0rm.com/exploits/7980
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