full-disclosure - Re: Firefox bookmark cross-domain surfing vulnerability

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Message-ID: <985b1a3d0702211601i52d68bb8u5e150b110ed6f070@mail.gmail.com>
Date: Thu, 22 Feb 2007 01:01:32 +0100
From: "Tyop?" <tyoptyop@...il.com>
To: "Michal Zalewski" <lcamtuf@...ne.ids.pl>, full-disclosure@...ts.grok.org.uk
Subject: Re: Firefox bookmark cross-domain surfing
	vulnerability

On 2/22/07, Michal Zalewski <lcamtuf@...ne.ids.pl> wrote:
> There is an interesting vulnerability in how Firefox handles bookmarks.
> The flaw allows the attacker to steal credentials from commonly used
> browser start sites (for Firefox, Google is the seldom changed default;
> that means exposure of GMail authentication cookies, etc).
>
> The problem: it is relatively easy to trick a casual user into bookmarking
> a window that does not point to any physical location, but rather, is an
> inline data: URL scheme. When such a link is later retrieved, Javascript
> code placed therein will execute in the context of a currently visited
> webpage. The destination page can then continue to load without the user
> noticing.
>
> The impact of such a vulnerability isn't devastating, but as mentioned
> earlier, any attention-grabbing webpage can exploit this to silently
> launch attacks against Google, MSN, AOL credentials, etc. In an unlikely
> case the victim is browsing local files or special URLs before following a
> poisoned bookmark, system compromise is possible.
>
> Thanks to Piotr Szeptynski for bringing up the subject of bookmarks and
> inspiring me to dig into this.
>
> Self-explanatory demo page:
>   http://lcamtuf.coredump.cx/ffbook/
>
> This is being tracked as:
>   https://bugzilla.mozilla.org/show_bug.cgi?id=371179

In April, just after MoPHPB, Michal Zalewski is going to plan
a Month of Firefox Bugs.

(^-^)

-- 
GUASCONI Vincent
Student.
http://altmylife.blogspot.com [Fr]

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