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re: II-Labs Advisory: Remote code execution in YaBBse 1.5.2 (php version)

daemon@ATHENA.MIT.EDU (Frog Man)
Mon May 12 12:28:07 2003

From: "Frog Man" <leseulfrog@hotmail.com>
To: bugtraq@securityfocus.com, vulnwatch@vulnwatch.org
Date: Sun, 11 May 2003 01:51:20 +0200
Mime-Version: 1.0
Content-Type: text/plain; charset=iso-8859-1; format=flowed
Message-ID: <Law15-F22idcDjoYAPN000106c6@hotmail.com>

A message has been published on BugTraq by DownBload 
(http://www.securityfocus.com/archive/1/320997/2003-05-07/2003-05-13/0) 
about an include vulnerabilty in Yabb SE 1.5.2 (the last version).

This solution :
-----------------------------------------------------------------------------------------------

======[ Solution

Add this line before include_once() lines mentioned above.

----cut here----
if (!isset($sourcedir)) $sourcedir = "";
----cut here----

-----------------------------------------------------------------------------------------------
doesn't change anything for the security.
A good solution could be :

--------------------------------------------------------------
if (file_exists($sourcedir.'/Errors.php')){
include_once ($sourcedir . '/Errors.php');
include_once ($sourcedir . '/Subs.php');
include_once ($sourcedir . '/Load.php');
}else{
die("Bad path.");
}
--------------------------------------------------------------


A patch will be (I hope :)) soon downloadable on http://www.phpsecure.info
The author of this message, a friend, has been alerted.

frog-m@n

_________________________________________________________________



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