NFS Mount Scanner

`##  
# This module requires Metasploit: https://metasploit.com/download  
# Current source: https://github.com/rapid7/metasploit-framework  
##  
  
class MetasploitModule < Msf::Auxiliary  
include Msf::Exploit::Remote::SunRPC  
include Msf::Auxiliary::Report  
include Msf::Auxiliary::Scanner  
include Msf::Auxiliary::Nfs  
  
def initialize  
super(  
'Name' => 'NFS Mount Scanner',  
'Description' => %q{  
This module scans NFS mounts and their permissions.  
},  
'Author' => ['<tebo[at]attackresearch.com>'],  
'References' => [  
['CVE', '1999-0170'],  
['CVE', '1999-0554'],  
['URL', 'https://www.ietf.org/rfc/rfc1094.txt']  
],  
'License' => MSF_LICENSE  
)  
  
register_options([  
OptEnum.new('PROTOCOL', [ true, 'The protocol to use', 'udp', ['udp', 'tcp']])  
])  
  
register_advanced_options(  
[  
OptBool.new('Mountable', [false, 'Determine if an export is mountable', true]),  
]  
)  
end  
  
def run_host(ip)  
program = 100005  
progver = 1  
procedure = 5  
  
sunrpc_create(datastore['PROTOCOL'], program, progver)  
sunrpc_authnull  
resp = sunrpc_call(procedure, '')  
  
# XXX: Assume that transport is udp and port is 2049  
# Technically we are talking to mountd not nfsd  
  
report_service(  
host: ip,  
proto: datastore['PROTOCOL'],  
port: 2049,  
name: 'nfsd',  
info: "NFS Daemon #{program} v#{progver}"  
)  
  
exports = resp[3, 1].unpack('C')[0]  
if (exports == 0x01)  
shares = []  
while Rex::Encoder::XDR.decode_int!(resp) == 1  
dir = Rex::Encoder::XDR.decode_string!(resp)  
grp = []  
grp << Rex::Encoder::XDR.decode_string!(resp) while Rex::Encoder::XDR.decode_int!(resp) == 1  
  
if can_mount?(grp, datastore['Mountable'], datastore['HOSTNAME'], datastore['LHOST'] || '')  
print_good("#{ip} Mountable NFS Export: #{dir} [#{grp.join(', ')}]")  
else  
print_status("#{ip} NFS Export: #{dir} [#{grp.join(', ')}]")  
end  
shares << [dir, grp]  
end  
report_note(  
host: ip,  
proto: datastore['PROTOCOL'],  
port: 2049,  
type: 'nfs.exports',  
data: { exports: shares },  
update: :unique_data  
)  
elsif (exports == 0x00)  
vprint_status("#{ip} - No exported directories")  
end  
  
sunrpc_destroy  
rescue ::Rex::Proto::SunRPC::RPCTimeout, ::Rex::Proto::SunRPC::RPCError => e  
vprint_error(e.to_s)  
end  
end  
`