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Re: [Squid 2004-Nuke-001] Inadequate Security Checking in PHPNuke v7.3 and earlier
From: Squid (squidsecurityhushmail.com)
Date: Sun Jun 06 2004 - 01:25:34 CDT
>Using eregi is NOT the problem. The problem is the usage of $_SERVER['PHP_SELF'] which can't handle URL requests which have a slash ('/') as their first character in the query_string and thinks this is part of it's path. Using SCRIPT_NAME is much safer...
I reported their use of eregi() WITH the NOT logical operator AGAINST $_SERVER['PHP_SELF'] is the problem not eregi() by itself
I agree using $_SERVER['SCRIPT_NAME'] is one way to fix it IF this element is available on the server. Since the manual says, "you may or may not find any of the following elements in $_SERVER," IMO it's safer to secure a file by checking whether a CONSTANT, which is defined in the calling script, exists in the called one.