Re: [Full-disclosure] FireFox Host: Buffer Overflow is not just exploitable on FireFox

[Juha-Matti Laurio <juha-matti.laurio@xxxxxxxx>]

> 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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