X2Engine 4.1.7 Unrestricted File Upload

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X2Engine <= 4.1.7 (FileUploadsFilter.php) Unrestricted File Upload Vulnerability  
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[-] Software Link:  
  
http://www.x2engine.com/  
  
  
[-] Affected Versions:  
  
Version 4.1.7 and probably prior versions.  
  
  
[-] Vulnerability Description:  
  
The vulnerability exists because of the FileUploadsFilter::EXT_BLACKLIST constant, which is a regular  
expression for blacklisted files. Due to a lack of case-insensitive matching, the global upload filter  
could be bypassed by uploading a malicious file with capital letters within the extension. This can be  
exploited to upload and execute arbitrary PHP scripts if X2Engine is running on a case-insensitive  
filesystem or if the web server is configured to handle files’ extensions in a case-insensitive fashion.  
  
  
[-] Solution:  
  
Update to version 4.2 or later.  
  
  
[-] Disclosure Timeline:  
  
[01/08/2014] - Vendor notified  
[02/08/2014] - 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-2014-5298 to this vulnerability.  
  
  
[-] Credits:  
  
Vulnerability discovered by Egidio Romano.  
  
  
[-] Original Advisory:  
  
http://karmainsecurity.com/KIS-2014-10  
  
  
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