X2Engine 4.1.7 Unrestricted File Upload

Type packetstorm
Reporter EgiX
Modified 2014-09-23T00:00:00


X2Engine <= 4.1.7 (FileUploadsFilter.php) Unrestricted File Upload Vulnerability  
[-] Software Link:  
[-] 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: