GolD_M has discovered some vulnerabilities in phpChess, which can be exploited by malicious people to disclose sensitive information or to compromise a vulnerable system.
Input passed to the "Root_Path" parameter in skins/phpchess/layout_admin_cfg.php, skins/phpchess/layout_cfg.php, and skins/phpchess/layout_t_top.php is not properly verified before being used to include files. This can be exploited to include arbitrary files from local or external resources.
Successful exploitation requires that "register_globals" is enabled.
The vulnerabilities are confirmed in phpChess Community Edition downloaded before 2007-09-27 and reportedly also affect phpChess Professional prior to version 3.9.3.
Solution: Update to phpChess Community Edition version 1.4 (2007-09-27) or phpChess Professional version 3.9.3 or later.
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