TUCoPS :: Browsers :: hack8013.htm

Firelinking [mikx]
Firelinking [Firefox 1.0.2]


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@mozilla.org if you 
disagree with their release policy.


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 




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  


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