X2Engine 4.1.7 PHP Object Injection

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X2Engine <= 4.1.7 (SiteController.php) PHP Object Injection Vulnerability  
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[-] Software Link:  
  
http://www.x2engine.com/  
  
  
[-] Affected Versions:  
  
All versions from 2.8 to 4.1.7.  
  
  
[-] Vulnerability Description:  
  
The vulnerable code is located in the "actionSendErrorReport" method defined in /protected/controllers/SiteController.php:  
  
153. public function actionSendErrorReport(){  
154. if(isset($_POST['report'])){  
155. $errorReport = $_POST['report'];  
156. $errorReport = unserialize(base64_decode($errorReport));  
157. if(isset($_POST['email'])){  
158. $errorReport['email'] = $_POST['email'];  
159. }  
  
User input passed through the "report" POST parameter is not properly sanitized before being used in a call to the "unserialize()"  
function at line 156. This can be exploited to inject arbitrary PHP objects into the application scope, and could allow an  
attacker to carry out Server-Side Request Forgery (SSRF) and possibly other attacks via specially crafted serialized objects.  
  
  
[-] Solution:  
  
Apply the vendor patch or update to version 4.2 or later.  
  
  
[-] Disclosure Timeline:  
  
[31/07/2014] - Vendor notified  
[31/07/2014] - Vendor released security patch: http://x2community.com/?showtopic=1804  
[01/08/2014] - CVE number requested  
[16/08/2014] - CVE number assigned  
[05/09/2014] - Version 4.2 released  
[23/09/2014] - Public disclosure  
  
  
[-] CVE Reference:  
  
The Common Vulnerabilities and Exposures project (cve.mitre.org)  
has assigned the name CVE-2014-5297 to this vulnerability.  
  
  
[-] Credits:  
  
Vulnerability discovered by Egidio Romano.  
  
  
[-] Original Advisory:  
  
http://karmainsecurity.com/KIS-2014-09  
  
  
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