Full Disclosure mailing list archives
Firespoofing [Firefox 1.0]
From: "mikx" <mikx () mikx de>
Date: Tue, 11 Jan 2005 00:22:09 +0100
__SummaryUsing javascript it is possible to spoof the content of security and download dialogs by partly covering them with a popup window. This can fool a user to download and automaticly execute a file (if a file extension association exists) or to grant a script local data access (if codebase principals are enabled).
__Expected BehaviorModal dialogs should always be on top and it should not be possible to obfuscate their appearance.
__Proof-of-Concept http://www.mikx.de/firespoofing/ The PoC is designed for Firefox 1.0 running in a maximized window. Part 1 - download dialog spoofingShows how to cover a download dialog and fool the user to execute a file with a standard windows file association (in this case a .ht file). BTW, remember the latest .ht buffer overflow...
Part 2 - security dialog spoofingShows how to cover a security dialog. Make sure codebase principals are enabled (not default but encouraged by many XUL sites). Creates the file c:\booom.txt to proof local system access.
__StatusThe bug is confirmed but currently unfixed (open for more than 3 months). As a partial workaround set dom.disable_window_flip to true in about:config. The vendor failed to respond to multiple status requests which led to this public disclosure.
2004-09-20 Vendor informed (bugzilla.mozilla.org #260560) 2004-09-20 Vendor confirmed bug 2004-10-20 Status request (open for 1 month - no reply) 2005-01-03 Status request (open for 3 months - no reply) 2005-01-07 Status request (disclosure warning - no reply) 2005-01-11 Public disclosure __Affected Software Tested with Firefox 1.0, Mozilla 1.7.5 and Netscape 7.1 on Windows XP SP2. __Contact Informations Michael Krax <mikx () mikx de> http://www.mikx.de/?p=7 mikx _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.netsys.com/full-disclosure-charter.html
Current thread:
- Firespoofing [Firefox 1.0] mikx (Jan 10)
- Re: Firespoofing [Firefox 1.0] Pavel Kankovsky (Jan 11)
- <Possible follow-ups>
- RE: Firespoofing [Firefox 1.0] Soderland, Craig (Jan 11)
- Re: Firespoofing [Firefox 1.0] James Greenhalgh (Jan 11)
- Re: Firespoofing [Firefox 1.0] Andrew Clover (Jan 11)
- Re: Firespoofing [Firefox 1.0] James Greenhalgh (Jan 11)