CVE-2007-3670

Argument injection vulnerability in Microsoft Internet Explorer, when
running on systems with Firefox installed and certain URIs registered,
allows remote attackers to conduct cross-browser scripting attacks and
execute arbitrary commands via shell metacharacters in a (1) FirefoxURL or
(2) FirefoxHTML URI, which are inserted into the command line that is
created when invoking firefox.exe. NOTE: it has been debated as to whether
the issue is in Internet Explorer or Firefox. As of 20070711, it is CVE’s
opinion that IE appears to be failing to properly delimit the URL argument
when invoking Firefox, and this issue could arise with other protocol
handlers in IE as well. However, Mozilla has stated that it will address
the issue with a “defense in depth” fix that will “prevent IE from sending
Firefox malicious data.”