From: Steve Shockley (steve.shockleyshockley.net)
Date: Tue Feb 28 2006 - 17:57:57 CST

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Renaud Lifchitz wrote:
> Mozilla Thunderbird : Multiple Information Disclosure Vulnerabilities

The css part of this "exploit" is actively used by Intellicontact (or
whatever they call themselves this week), the host of the factcheck.org
mailing list. For example:

<LINK href=http://mail1.icptrack.com/track/relay.php?r=###&msgid=
=###&act=####&admin=0&destination=http://www.factcheck.org/styles/subpage_nn.css
type=text/css rel=stylesheet>

To work around this, set:

user_pref("mailnews.display.html_as", 3);

and

user_pref("mailnews.display.html_sanitizer.allowed_tags", "html head
title body p br div(lang,title) h1 h2 h3 h4 h5 h6 ul(type,compact)
ol(type,compact,start) li(type,value) dl dt dd blockquote(type,cite) pre
noscript noframes strong em sub sup span(lang,title) acronym(title)
abbr(title) del(title,cite,datetime) ins(title,cite,datetime) q(cite)
a(href,name,title) base(href) area(alt) applet(alt) object(alt) var samp
dfn address kbd code cite s strike tt b i table(align) caption
tr(align,valign) td(rowspan,colspan,align,valign)
th(rowspan,colspan,align,valign)");
(one line)

in prefs.js.

works around the css problem because link isn't an allowed html tag. I
didn't test your iframe version, but I suspect this will work around
that as well.

Reference: http://www.bucksch.com/1/projects/mozilla/108153/

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