Full Disclosure mailing list archives
Re: Firefox bookmark cross-domain surfing vulnerability
From: "Tyop?" <tyoptyop () gmail com>
Date: Thu, 22 Feb 2007 01:01:32 +0100
On 2/22/07, Michal Zalewski <lcamtuf () dione 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] _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.grok.org.uk/full-disclosure-charter.html Hosted and sponsored by Secunia - http://secunia.com/
Current thread:
- Firefox bookmark cross-domain surfing vulnerability Michal Zalewski (Feb 21)
- Re: Firefox bookmark cross-domain surfing vulnerability Tyop? (Feb 21)
- Re: Firefox bookmark cross-domain surfing vulnerability pdp (architect) (Feb 21)
- Re: Firefox bookmark cross-domain surfing vulnerability Michal Zalewski (Feb 21)
- Re: Firefox bookmark cross-domain surfing vulnerability pdp (architect) (Feb 22)
- Re: Firefox bookmark cross-domain surfing vulnerability Michal Zalewski (Feb 22)
- Re: Firefox bookmark cross-domain surfing vulnerability pdp (architect) (Feb 22)
- Re: Firefox bookmark cross-domain surfing vulnerability Daniel Veditz (Feb 22)
- Re: Firefox bookmark cross-domain surfing vulnerability Michal Zalewski (Feb 21)
- <Possible follow-ups>
- Re: Firefox bookmark cross-domain surfing vulnerability v3dt3n (Feb 21)