bugtraq - Re: FireFox Host: Buffer Overflow is not just exploitable on FireFox

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Date: Fri, 16 Sep 2005 11:39:37 -0500
From: "milw0rm Inc." <milw0rm@...il.com>
To: Juha-Matti Laurio <juha-matti.laurio@...ti.fi>
Cc: security@...illa.org, security@...scape.org, berendjanwever@...il.com,
	bugtraq@...urityfocus.com, full-disclosure@...ts.grok.org.uk
Subject: Re: FireFox Host: Buffer Overflow is not just
	exploitable on FireFox


This problem also effects Thunderbird (tested) and im guessing
Netscape's Mail client (untested) which it really can't do much except
cause Thunderbird/Netscape to crash without javascript.

Include the linked source in an email for your testing.

http://www.milw0rm.com/down.php?id=1204

/str0ke

On 9/13/05, Juha-Matti Laurio <juha-matti.laurio@...ti.fi> wrote:
> >Hi all,
> >Research and development has let to a ~90% reliable working exploit for the
> >IDN Heap Buffer overrun in FireFox on WinXP and Win2k3 as long as DEP is
> >turned off and JavaScript is enabled. Some tweaking might yield an even
> >higher success ratio. It has also revealed that not only FireFox is
> >vulnerable to this vulnerability, but the exact same exploit works on the
> >latest releases of all these products based on the Mozilla engine:
> >- Mozilla FireFox 1.0.6 and 1.5beta,
> >- Mozilla Browser 1.7.11,
> >- Netscape 8.0.3.3 <http://8.0.3.3>.
> >Recommendations for this vulnerability:
> >- FireFox and Mozilla: Install the workaround for (
> https://addons.mozilla.org/messages/307259.html).
> >- Netscape: hope they'll respond to this email and release a workaround.
> >- Wait for a patch and install it asap.
> >Recommendations to make it harder to exploit any FireFox vulnerability:
> >- Turn on DEP (Data Execution Prevention),
> >- Turn off JavaScript,
> >- Switch to another browser,
> >- Do not browse untrusted sites,
> >- Do not browse the web at all,
> >- Unplug your machine from the web,
> >- Wear a tinfoil hat.
> >Cheers,
> >SkyLined
> 
> BTW: From where is that security [at] netscape.org address?
> 1)
> An official security URL to Netscape is "Netscape Browser Bug Submission
> Form" at
> http://browser.netscape.com/ns8/support/bugreport.jsp
> (www.netscape.org redirects to home.netscape.com/ , of course they have
> netscape.org, netscape.net etc.)
> 
> For version 7.2 (and 7.x?) it is the following:
> http://wp.netscape.com/browsers/7/feedback/problem.html
> Two separate addresses due to different developer teams, according to
> my knowledge. Is there any new information?
> 
> I have informed the vendor Netscape being affected on 9th September 2005.
> 
> 2)
> Disabling IDN support via about:config (or prefs.js file) is possible in
> Netscape Browser 8 too. Xpi file for Firefox and Mozilla Suite works in
> Netscape 8.0.3.3 too. Test was successful and even UA was changed to
> include ....Gecko/20050729 (No IDN) Netscape/8.0.3.3.
> However, the manual method is recommended.
> I.e. there is a workaround for Netscape. Vendor developer team contacted
> during a weekend, no reply yet.
> 
> 3)
> When an updated version of Netscape Browser 8 is available the download
> link is http://browser.netscape.com/ns8/download/default.jsp
> 
> - Juha-Matti
> 
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