[MajorSecurity Advisory #65]Motorola Milestone Smartphone Denial of Service

[david@xxxxxxxxxxxxxxxxxx]

[MajorSecurity Advisory #65]Motorola Milestone Smartphone Denial of Service

Details
============
Product: Motorola Milestone(Droid) Smartphone
Security-Risk: low
Remote-Exploit: yes
Vendor-URL: http://www.motorola.com/
Vendor-Status: informed
Advisory-Status: published on 02-02-2010

Credits
============
Discovered by: David Vieira-Kurz
http://www.majorsecurity.info

Affected Products:
============
Motorola Milestone(Droid) smartphone Browser with following useragent:
Mozilla/5.0 (Linux; U; Android 2.0; de-de; Milestone Build/SHOLS_U2_01.03.1) 
AppleWebKit/530.17 (KHTML, like Gecko) Version/4.0 Mobile Safari/530.17

Original Advisory:
============
http://www.majorsecurity.info/index_2.php?adv=major_rls65

Introduction
============
The Motorola Milestone(droid) is a smartphone produced by Motorola based on the 
android operation system.

More Details
============
A remotely exploitable vulnerability has been found in the JavaScript Engine of 
the MobileSafari Browser(based on Webkit Engine) used on the Motorola 
Milestone(droid) smartphone.
In detail, the following flaw was determined:
The Motorola Milestone(Droid) is prone to a denial of service vulnerability 
when parsing certain HTML content. 
This is possible due to a failure in handling exceptional conditions.
This issue is caused by a memory corruption error when handling javascript 
elements,
which could be exploited by remote attackers to crash the browser by tricking a 
user into visiting a specially crafted web page.
This issue can NOT be lead to remote code execution, so that the potential 
security risk is rated low.

The exploit has been tested on a Motorola Milestone(Droid) using following 
useragent:

Mozilla/5.0 (Linux; U; Android 2.0; de-de; Milestone Build/SHOLS_U2_01.03.1) 
AppleWebKit/530.17 (KHTML, like Gecko) Version/4.0 Mobile Safari/530.17

Proof of Concept:
============
   <script>
    var overloadtag = "<marquee>";
    for(x=1;x<=9999999999999;x++){
      document.write(overloadtag);
    }
   &lt;/script&gt;

MajorSecurity
================
MajorSecurity is a German penetrationtesting and security research company 
which focuses
on web application security. We offer professional penetrationtestings, 
security audits,
source code reviews and reliable proof of concepts. You will find more 
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