php-proxima Remote File Access Vulnerability

From: Mind Warper (mindwarperat_private)
Date: Wed May 14 2003 - 10:43:40 PDT

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    php-proxima Remote File Access Vulnerability
    
    ---------------------- 
    Vendor Information: 
    ---------------------- 
    
    Homepage : http://www.php-proxima.com
    Vendor : informed 
    Mailed advisory: 14/05/03 
    Vender Response : None 
    
    ---------------------- 
    Affected Versions: 
    ---------------------- 
    
    php-proxima 6.0 and prior
    
    ---------------------- 
    Vulnerability: 
    ---------------------- 
    
    php-proxima is a website portal system made in php. php-proxima is actually
    a different version of php-nuke, very similar although it has some changes.
    
    One of the changes is that php-proxima contains a file called autohtml.php.
    By sending a specific request as shown bellow an attacker may be able to
    include local files and therefore read them.
    
    The problem appears here:
    
    ***************************
    ..
    
    witch($op) {
    
        case "modload":
    	if (!isset($mainfile)) { include("mainfile.php"); }
    	$index = 0;
    	include("header.php");
    	OpenTable();
       				include("autohtml/$name");
    
    ..
    ***************************
    
    Since the case has been coded so poorly in terms of security, a user
    can avoid including mainfile.php and inject anything into $name.
    
    Example:
    
    http://victim/autohtml.php?op=modload&mainfile=x&name= filename>
    
    ---------------------- 
    Solution: 
    ---------------------- 
    
    You can fix this problem by replacing
    include("autohtml/$name");
    with
    // include("autohtml/$name");
    
    Please check the vendor's website for new patches. 
    
    ---------------------- 
    Contact: 
    ---------------------- 
    
    Name: Mindwarper 
    Email: mindwarperat_private
    Website: http://mindlock.bestweb.net 
    
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