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Subject: [FD] [KIS-2014-09] X2Engine <= 4.1.7 (SiteController.php) PHP Object Injection Vulnerability
From: Egidio Romano <research () karmainsecurity ! com>
Date: 2014-09-23 15:12:57
Message-ID: 54218DF9.9030005 () karmainsecurity ! com
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-------------------------------------------------------------------------
X2Engine <= 4.1.7 (SiteController.php) PHP Object Injection Vulnerability
-------------------------------------------------------------------------
[-] 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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