Arbitrary File Upload in HelpDEZk

[High-Tech Bridge Security Research <advisory@xxxxxxxxxxxx>]

Advisory ID: HTB23239
Product: HelpDEZk
Vendor: HelpDEZk
Vulnerable Version(s): 1.0.1 and probably prior
Tested Version: 1.0.1
Advisory Publication:  October 15, 2014  [without technical details]
Vendor Notification: October 15, 2014 
Public Disclosure: November 5, 2014 
Vulnerability Type: Unrestricted Upload of File with Dangerous Type [CWE-434]
CVE Reference: CVE-2014-8337
Risk Level: Critical 
CVSSv2 Base Score: 10 (AV:N/AC:L/Au:N/C:C/I:C/A:C)
Solution Status: Solution Available
Discovered and Provided: High-Tech Bridge Security Research Lab ( 
https://www.htbridge.com/advisory/ ) 

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Advisory Details:

High-Tech Bridge Security Research Lab discovered vulnerability in HelpDEZk, 
which can be exploited to compromise vulnerable web site.


1) Unrestricted Upload of File with Dangerous Type in HelpDEZk: CVE-2014-8337

The vulnerability exists due to absence of validation of file extensions when 
uploading files in "/includes/classes/uploadify-v2.1.4/uploadify.php" script. A 
remote attacker can upload files with arbitrary extension into directory within 
application's web root and execute them with privileges of the web server. 

Additionally, access to the upload script is not restricted to anonymous users. 
A remote unauthenticated attacker can access the vulnerable script and 
successfully upload malicious files on the server. 

Below we provide an example of form that can be used to upload files on the 
vulnerable website:


<form 
action="http://[host]/includes/classes/uploadify-v2.1.4/uploadify.php?folder="; 
method="post" name="main" enctype="multipart/form-data">
<input type="file" name="Filedata">
<input type="submit" id="btn">
</form>


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Solution:

Remove "uploadify" files from "/includes/classes/" directory.

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References:

[1] High-Tech Bridge Advisory HTB23239 - 
https://www.htbridge.com/advisory/HTB23239 - Arbitrary File Upload in HelpDEZk.
[2] HelpDEZk - http://helpdezk.org/ - HelpDEZk is a powerfull software that 
manages requests/incidents.
[3] Common Vulnerabilities and Exposures (CVE) - http://cve.mitre.org/ - 
international in scope and free for public use, CVE® is a dictionary of 
publicly known information security vulnerabilities and exposures.
[4] Common Weakness Enumeration (CWE) - http://cwe.mitre.org - targeted to 
developers and security practitioners, CWE is a formal list of software 
weakness types.
[5] ImmuniWeb® SaaS - https://www.htbridge.com/immuniweb/ - hybrid of manual 
web application penetration test and cutting-edge vulnerability scanner 
available online via a Software-as-a-Service (SaaS) model.

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Disclaimer: The information provided in this Advisory is provided "as is" and 
without any warranty of any kind. Details of this Advisory may be updated in 
order to provide as accurate information as possible. The latest version of the 
Advisory is available on web page [1] in the References.