FireFox users, you need to upgrade to 0.9.2 as soon as possible as there is a shell access security hole that needs to be patched:
http://www.eweek.com/print_article/0,1761,a=131090,00.asp
http://ftp.mozilla.org/pub/mozilla.org/firefox/releases/0.9.2/
http://www.eweek.com/print_article/0,1761,a=131090,00.asp
links in a Web page using the "shell:" scheme can execute arbitrary programs on the user's system. The attacker would have to know the location in the file system of the program, but there are known programs in Windows with buffer overflows.
This means the attacker could create a link in a Web page that could execute arbitrary code under Windows. Through the use of an appropriate META tag, the attack could load without the user having to click a link explicitly.
In the definition of a URI (Uniform Resource Identifier), the technical name for a Web address, "shell:" is not a protocol like http but a scheme. Some schemes map directly to protocol handlers in the browser itself or externally, such as those that handle audio and video media.
http://ftp.mozilla.org/pub/mozilla.org/firefox/releases/0.9.2/
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