Document Title:
===============
Apple iOS 11.x - Webkit Filter Backdrop DoS Vulnerability


References:
===========
https://www.vulnerability-lab.com/get_content.php?id=2150

View Video: https://www.youtube.com/watch?v=oKtF9q15Unw



Release Date:
=============
2018-09-18


Vulnerability Laboratory ID (VL-ID):
====================================
2150


Common Vulnerability Scoring System:
====================================
4.1


Vulnerability Class:
====================
Denial of Service


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


Vulnerability Disclosure Timeline:
==================================
2018-09-17: 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:
================================
The video demonstrates the reproduce of a safari browser web vulnerability in the webkit filter-backdrop component.
The security vulnerability affects the apple ios v8.x up to 11.x on iphones (6,7 & 8) and ipad (1 & 2). The issue shows a loop 
used within weak webkit function with transparency through safari v10.x & v11.x. The vulnerability was reported in september 
by the researcher sabri to the apple product security team.


Credits & Authors:
==================
Vulnerability-Lab [research@vulnerability-lab.com] - https://www.vulnerability-lab.com/show.php?user=Vulnerability-Lab


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