Exploit the possiblities

Apple Watch Denial Of Service

Apple Watch Denial Of Service
Posted Jan 28, 2016
Authored by Mohammad Reza Espargham | Site vulnerability-lab.com

Apple Watch suffers from a denial of service vulnerability.

tags | exploit, denial of service
systems | apple
MD5 | 819a6dadb5f3c3926a05ac8b36c4b4a5

Apple Watch Denial Of Service

Change Mirror Download
Document Title:
Apple WatchOS v2.1 - Denial of Service Vulnerability

References (Source):

Followup ID: 634926833

Release Date:

Vulnerability Laboratory ID (VL-ID):

Common Vulnerability Scoring System:

Product & Service Introduction:
To take advantage of its size and location on your wrist, Apple Watch was designed with its own unique operating system — watchOS.
With watchOS 2, we’ve refined it. There are more faces to choose from. Faster, more powerful apps. Enhanced communication options.
And innovative new ways to make your Apple Watch your own.

(Copy of the Vendor Homepage: http://www.apple.com/watchos-2/ )

Abstract Advisory Information:
An independent vulnerability laboratory researcher discovered a denial of service vulnerability in the official Apple (Apple Watch) WatchOS v2.1 & v2.2.

Vulnerability Disclosure Timeline:
2016-01-09: Researcher Notification & Coordination (Mohammad Reza Espargham)
2016-01-18: Public Disclosure (Vulnerability Laboratory)

Discovery Status:

Affected Product(s):
Product: Watch OS - Apple Watch 2.0 & 2.1

Exploitation Technique:

Severity Level:

Technical Details & Description:
A Denial of Service Vulnerability has been discovered in the official Apple (Apple Watch) WatchOS v2.1 & v2.2.
The vulnerability allows to crash the mobile operating of apple by interaction with an default mobile application.

Local attackers with restricted accounts are able to include a new `Alarm`. The input field of the alarm function
is not correctly encoding the context. Thus results in an unexpected error with the alert handler of watchOS.
After including a malicious loop as input, the attacker is able to save the context and the watchOS crashs temporarily.

The security risk of the denial of service vulnerability is estimated as low with a cvss (common vulnerability scoring system) count of 2.9.
Exploitation of the denial of service software vulnerability requires a low privileged or restricted user account without user interaction.
Successful exploitation of the vulnerability results in a permanent crash of the watchOS each time the alert is executed.

Vulnerable OS:
[+] Watch OS

Vulnerable Module(s):
[+] Add Alarm (Add Alert - Clock)

Proof of Concept (PoC):
The vulnerability can be exploited by local attackers with physical access or restricted access to the watchOS.
For security demonstration or to reproduce the vulnerability follow the provided information and steps below to continue.

Manual steps to reproduce the vulnerability ...
1. Open your phone Clock / goto Alarm
2. Add alarm / set time [for example two minutes later]
3. click label / input 5000 x “0"
4. Save
5. Lock Your phone and wait for alarm
6. When the alarm clock rings / Watch Crashed

Security Risk:
The security risk of the denial of service vulnerability in the apple watch with iOS v9.x is estimated as low. (CVSS 2.9)

Credits & Authors:
Mohammad Reza Espargham (reza.espargham@gmail.com) - [https://twitter.com/rezesp] [www.reza.es]

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 or its suppliers are not liable
in any case of damage, including direct, indirect, incidental, consequential loss of business profits 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 vendor licenses,
policies, deface websites, hack into databases or trade with fraud/stolen material.

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