224 lines
6.8 KiB
Python
224 lines
6.8 KiB
Python
|
# This file is part of Scapy
|
||
|
|
# See http://www.secdev.org/projects/scapy for more information
|
||
|
|
# Copyright (C) Philippe Biondi <phil@secdev.org>
|
||
|
|
# This program is published under a GPLv2 license
|
||
|
|
|
||
|
|
"""Clone of Nmap's first generation OS fingerprinting.
|
||
|
|
|
||
|
|
This code works with the first-generation OS detection and
|
||
|
|
nmap-os-fingerprints, which has been removed from Nmap on November 3,
|
||
|
|
2007 (https://github.com/nmap/nmap/commit/50c49819), which means it is
|
||
|
|
outdated.
|
||
|
|
|
||
|
|
To get the last published version of this outdated fingerprint
|
||
|
|
database, you can fetch it from
|
||
|
|
<https://raw.githubusercontent.com/nmap/nmap/9efe1892/nmap-os-fingerprints>.
|
||
|
|
|
||
|
|
"""
|
||
|
|
|
||
|
|
from __future__ import absolute_import
|
||
|
|
import os
|
||
|
|
import re
|
||
|
|
|
||
|
|
from scapy.data import KnowledgeBase
|
||
|
|
from scapy.config import conf
|
||
|
|
from scapy.arch import WINDOWS
|
||
|
|
from scapy.error import warning
|
||
|
|
from scapy.layers.inet import IP, TCP, UDP, ICMP, UDPerror, IPerror
|
||
|
|
from scapy.packet import NoPayload
|
||
|
|
from scapy.sendrecv import sr
|
||
|
|
from scapy.compat import plain_str, raw
|
||
|
|
import scapy.modules.six as six
|
||
|
|
|
||
|
|
|
||
|
|
if WINDOWS:
|
||
|
|
conf.nmap_base = os.environ["ProgramFiles"] + "\\nmap\\nmap-os-fingerprints" # noqa: E501
|
||
|
|
else:
|
||
|
|
conf.nmap_base = "/usr/share/nmap/nmap-os-fingerprints"
|
||
|
|
|
||
|
|
|
||
|
|
######################
|
||
|
|
# nmap OS fp stuff #
|
||
|
|
######################
|
||
|
|
|
||
|
|
|
||
|
|
_NMAP_LINE = re.compile('^([^\\(]*)\\(([^\\)]*)\\)$')
|
||
|
|
|
||
|
|
|
||
|
|
class NmapKnowledgeBase(KnowledgeBase):
|
||
|
|
"""A KnowledgeBase specialized in Nmap first-generation OS
|
||
|
|
fingerprints database. Loads from conf.nmap_base when self.filename is
|
||
|
|
None.
|
||
|
|
|
||
|
|
"""
|
||
|
|
|
||
|
|
def lazy_init(self):
|
||
|
|
try:
|
||
|
|
fdesc = open(conf.nmap_base
|
||
|
|
if self.filename is None else
|
||
|
|
self.filename, "rb")
|
||
|
|
except (IOError, TypeError):
|
||
|
|
warning("Cannot open nmap database [%s]", self.filename)
|
||
|
|
self.filename = None
|
||
|
|
return
|
||
|
|
|
||
|
|
self.base = []
|
||
|
|
name = None
|
||
|
|
sig = {}
|
||
|
|
for line in fdesc:
|
||
|
|
line = plain_str(line)
|
||
|
|
line = line.split('#', 1)[0].strip()
|
||
|
|
if not line:
|
||
|
|
continue
|
||
|
|
if line.startswith("Fingerprint "):
|
||
|
|
if name is not None:
|
||
|
|
self.base.append((name, sig))
|
||
|
|
name = line[12:].strip()
|
||
|
|
sig = {}
|
||
|
|
continue
|
||
|
|
if line.startswith("Class "):
|
||
|
|
continue
|
||
|
|
line = _NMAP_LINE.search(line)
|
||
|
|
if line is None:
|
||
|
|
continue
|
||
|
|
test, values = line.groups()
|
||
|
|
sig[test] = dict(val.split('=', 1) for val in
|
||
|
|
(values.split('%') if values else []))
|
||
|
|
if name is not None:
|
||
|
|
self.base.append((name, sig))
|
||
|
|
fdesc.close()
|
||
|
|
|
||
|
|
|
||
|
|
nmap_kdb = NmapKnowledgeBase(None)
|
||
|
|
|
||
|
|
|
||
|
|
def nmap_tcppacket_sig(pkt):
|
||
|
|
res = {}
|
||
|
|
if pkt is not None:
|
||
|
|
res["DF"] = "Y" if pkt.flags.DF else "N"
|
||
|
|
res["W"] = "%X" % pkt.window
|
||
|
|
res["ACK"] = "S++" if pkt.ack == 2 else "S" if pkt.ack == 1 else "O"
|
||
|
|
res["Flags"] = str(pkt[TCP].flags)[::-1]
|
||
|
|
res["Ops"] = "".join(x[0][0] for x in pkt[TCP].options)
|
||
|
|
else:
|
||
|
|
res["Resp"] = "N"
|
||
|
|
return res
|
||
|
|
|
||
|
|
|
||
|
|
def nmap_udppacket_sig(snd, rcv):
|
||
|
|
res = {}
|
||
|
|
if rcv is None:
|
||
|
|
res["Resp"] = "N"
|
||
|
|
else:
|
||
|
|
res["DF"] = "Y" if rcv.flags.DF else "N"
|
||
|
|
res["TOS"] = "%X" % rcv.tos
|
||
|
|
res["IPLEN"] = "%X" % rcv.len
|
||
|
|
res["RIPTL"] = "%X" % rcv.payload.payload.len
|
||
|
|
res["RID"] = "E" if snd.id == rcv[IPerror].id else "F"
|
||
|
|
res["RIPCK"] = "E" if snd.chksum == rcv[IPerror].chksum else (
|
||
|
|
"0" if rcv[IPerror].chksum == 0 else "F"
|
||
|
|
)
|
||
|
|
res["UCK"] = "E" if snd.payload.chksum == rcv[UDPerror].chksum else (
|
||
|
|
"0" if rcv[UDPerror].chksum == 0 else "F"
|
||
|
|
)
|
||
|
|
res["ULEN"] = "%X" % rcv[UDPerror].len
|
||
|
|
res["DAT"] = "E" if (
|
||
|
|
isinstance(rcv[UDPerror].payload, NoPayload) or
|
||
|
|
raw(rcv[UDPerror].payload) == raw(snd[UDP].payload)
|
||
|
|
) else "F"
|
||
|
|
return res
|
||
|
|
|
||
|
|
|
||
|
|
def nmap_match_one_sig(seen, ref):
|
||
|
|
cnt = sum(val in ref.get(key, "").split("|")
|
||
|
|
for key, val in six.iteritems(seen))
|
||
|
|
if cnt == 0 and seen.get("Resp") == "N":
|
||
|
|
return 0.7
|
||
|
|
return float(cnt) / len(seen)
|
||
|
|
|
||
|
|
|
||
|
|
def nmap_sig(target, oport=80, cport=81, ucport=1):
|
||
|
|
res = {}
|
||
|
|
|
||
|
|
tcpopt = [("WScale", 10),
|
||
|
|
("NOP", None),
|
||
|
|
("MSS", 256),
|
||
|
|
("Timestamp", (123, 0))]
|
||
|
|
tests = [
|
||
|
|
IP(dst=target, id=1) /
|
||
|
|
TCP(seq=1, sport=5001 + i, dport=oport if i < 4 else cport,
|
||
|
|
options=tcpopt, flags=flags)
|
||
|
|
for i, flags in enumerate(["CS", "", "SFUP", "A", "S", "A", "FPU"])
|
||
|
|
]
|
||
|
|
tests.append(IP(dst=target) / UDP(sport=5008, dport=ucport) / (300 * "i"))
|
||
|
|
|
||
|
|
ans, unans = sr(tests, timeout=2)
|
||
|
|
ans.extend((x, None) for x in unans)
|
||
|
|
|
||
|
|
for snd, rcv in ans:
|
||
|
|
if snd.sport == 5008:
|
||
|
|
res["PU"] = (snd, rcv)
|
||
|
|
else:
|
||
|
|
test = "T%i" % (snd.sport - 5000)
|
||
|
|
if rcv is not None and ICMP in rcv:
|
||
|
|
warning("Test %s answered by an ICMP", test)
|
||
|
|
rcv = None
|
||
|
|
res[test] = rcv
|
||
|
|
|
||
|
|
return nmap_probes2sig(res)
|
||
|
|
|
||
|
|
|
||
|
|
def nmap_probes2sig(tests):
|
||
|
|
tests = tests.copy()
|
||
|
|
res = {}
|
||
|
|
if "PU" in tests:
|
||
|
|
res["PU"] = nmap_udppacket_sig(*tests["PU"])
|
||
|
|
del tests["PU"]
|
||
|
|
for k in tests:
|
||
|
|
res[k] = nmap_tcppacket_sig(tests[k])
|
||
|
|
return res
|
||
|
|
|
||
|
|
|
||
|
|
def nmap_search(sigs):
|
||
|
|
guess = 0, []
|
||
|
|
for osval, fprint in nmap_kdb.get_base():
|
||
|
|
score = 0.0
|
||
|
|
for test, values in six.iteritems(fprint):
|
||
|
|
if test in sigs:
|
||
|
|
score += nmap_match_one_sig(sigs[test], values)
|
||
|
|
score /= len(sigs)
|
||
|
|
if score > guess[0]:
|
||
|
|
guess = score, [osval]
|
||
|
|
elif score == guess[0]:
|
||
|
|
guess[1].append(osval)
|
||
|
|
return guess
|
||
|
|
|
||
|
|
|
||
|
|
@conf.commands.register
|
||
|
|
def nmap_fp(target, oport=80, cport=81):
|
||
|
|
"""nmap fingerprinting
|
||
|
|
nmap_fp(target, [oport=80,] [cport=81,]) -> list of best guesses with accuracy
|
||
|
|
"""
|
||
|
|
sigs = nmap_sig(target, oport, cport)
|
||
|
|
return nmap_search(sigs)
|
||
|
|
|
||
|
|
|
||
|
|
@conf.commands.register
|
||
|
|
def nmap_sig2txt(sig):
|
||
|
|
torder = ["TSeq", "T1", "T2", "T3", "T4", "T5", "T6", "T7", "PU"]
|
||
|
|
korder = ["Class", "gcd", "SI", "IPID", "TS",
|
||
|
|
"Resp", "DF", "W", "ACK", "Flags", "Ops",
|
||
|
|
"TOS", "IPLEN", "RIPTL", "RID", "RIPCK", "UCK", "ULEN", "DAT"]
|
||
|
|
txt = []
|
||
|
|
for i in sig:
|
||
|
|
if i not in torder:
|
||
|
|
torder.append(i)
|
||
|
|
for test in torder:
|
||
|
|
testsig = sig.get(test)
|
||
|
|
if testsig is None:
|
||
|
|
continue
|
||
|
|
txt.append("%s(%s)" % (test, "%".join(
|
||
|
|
"%s=%s" % (key, testsig[key]) for key in korder if key in testsig
|
||
|
|
)))
|
||
|
|
return "\n".join(txt)
|