Hi folks. When MSIE 5 users bookmark a page, the browser will request a file named "favicon.ico" which is to be used in the "Favorites" menu of the browser. Unfortunately MSIE 5 doesn't check the file integrity and crash if faced with a bad-formed icon file. Upon crashing the stack gets filled with information from the icon file itself, so it may be possible to run code on the client machine, tough I didn't test it. Microsoft was notified twice about this issue via the "Report a Bug" form on their web site. The first time about one month ago, the second time about two weeks ago. I didn't receive back any reply. More information about this bug (plus another privacy issue about the "favicon.ico" file) is available at http://web.cip.com.br/flaviovs/sec/favicon/index.html. -- Flavio
This archive was generated by hypermail 2b30 : Fri Apr 13 2001 - 14:44:42 PDT