Message-ID: <C56B81159AD346478B2C9D1487742F0B46790CFB@portcullis-security.com>
Date: Fri, 25 Sep 2015 13:02:08 +0000
From: Portcullis Advisories <advisories@...tcullis-security.com>
To: "'vuln@...unia.com'" <vuln@...unia.com>, "'moderators@...db.org'"
 <moderators@...db.org>, "'fulldisclosure@...lists.org'"
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Subject: [FD] CVE-2015-5074 - Arbitrary File Upload In X2Engine Inc. X2Engine

Vulnerability title: Arbitrary File Upload In X2Engine Inc. X2Engine
CVE: CVE-2015-5074
Vendor: X2Engine Inc.
Product: X2Engine
Affected version: 4.2
Fixed version: 5.2
Reported by: Simone Quatrini
Details:

It was discovered that authenticated users were able to upload files of any type providing that the file did not have an extension that was listed in the following blacklist:

const EXT_BLACKLIST = '/\.\s*(P<ext>html|htm|js|jsb|mhtml|mht|xhtml|xht|php|phtml|php3|php4|php5|phps|shtml|jhtml|pl|py|cgi|exe|scr|dll|msi|vbs|bat|com|pif|cmd|vxd|cpl|ini|conf|cnf|key|iv|htaccess)\b/i';

However, there is another common (not present in regexp) that allow PHP execution: .PHT. It is therefore possible to execute any PHP code on the remote system.

Further details at:

https://www.portcullis-security.com/security-research-and-downloads/security-advisories/cve-2015-5074/

Copyright:
Copyright (c) Portcullis Computer Security Limited 2015, All rights reserved worldwide. Permission is hereby granted for the electronic redistribution of this information. It is not to be edited or altered in any way without the express written consent of Portcullis Computer Security Limited.

Disclaimer:
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Limited) be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

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