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Date: Mon Apr 18 18:54:07 2005 From: Michael.Scovetta at ca.com (Scovetta, Michael V) Subject: RE: Firelinking [Firefox 1.0.2] I can confirm that the POC works on 1.0.2 and does not work on 1.0.3. Michael Scovetta Computer Associates Senior Application Developer -----Original Message----- From: mikx [mailto:mikx@...x.de] Sent: Monday, April 18, 2005 6:59 AM To: full-disclosure@...ts.grok.org.uk; bugtraq@...urityfocus.com; NTBUGTRAQ@...TSERV.NTBUGTRAQ.COM Subject: Firelinking [Firefox 1.0.2] __Notice I really wonder why the Mozilla Foundation decided to release a serious security update on a friday night and to disclose the link to my proof-of-concept code so quickly. It wasn't intendet from my side to release this as a 0day exploit. Please complain to security@...illa.org if you disagree with their release policy. __Summary The link tag allows to load a custom image as the icon for a website, displayed in the location bar and in the tab title. By setting the href attribute of this tag to a javascript url, it is possible to call chrome functions and run arbitrary code without user interaction. __Proof-of-Concept http://www.mikx.de/firelinking/ __Status The bug is fixed in Firefox 1.0.3. Disable Javascript as a workaround. 2005-04-12 Vendor informed (bugzilla.mozilla.org #290036) 2005-04-12 Vendor confirmed bug 2005-04-15 Vendor published fix, advisory and link to PoC (mfsa2005-37) 2005-04-18 This advisory __Affected Software Tested with Firefox 1.0.2 __Contact Informations Michael Krax <mikx@...x.de> http://www.mikx.de/?p=15 mikx
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