Waraxe IT Security Portal  
  Login or Register
::  Home  ::  Search  ::  Your Account  ::  Forums  ::   Waraxe Advisories  ::  Tools  ::
October 10, 2015
 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: DanoMono
New Today: 0
New Yesterday: 1
Overall: 9006

People Online:
Visitors: 197
Members: 0
Total: 197
PacketStorm News
·Mandriva Linux Security Advisory 2015-027
·Debian Security Advisory 3129-1
·Mandriva Linux Security Advisory 2015-025
·Mandriva Linux Security Advisory 2015-026
·Mandriva Linux Security Advisory 2015-024
·Mandriva Linux Security Advisory 2015-023
·Debian Security Advisory 3128-1
·FreeBSD Security Advisory - OpenSSL Updates
·Ubuntu Security Notice USN-2475-1
·Ubuntu Security Notice USN-2474-1

[waraxe-2007-SA#053] - Critical Sql Injection in NukeSentinel 2.5.11

Author: Janek Vind "waraxe"
Date: 25. September 2007
Location: Estonia, Tartu
Web: http://www.waraxe.us/advisory-53.html

Target software description:


NukeSentinel is anti-hacking sofware, meant to be make phpnuke CMS more secure.
As known for everyone, phpnuke is one of the most unsecurely written content
management systems in history and even now, A.D. 2007 it's not better. Instead
of rewriting phpnuke from scatch, there are huge collection of various patches,
fixes, protector systems, platinum and whatever else editions and so on and
so on. All for adding additional "security" layers around buggy, bloated and
highly unoptimized phpnuke engine.
NukeSentinel seems to be most respected and powerful "protection system" for
phpnuke and yes - it can make attacking nuke-powered website more complicated.
But as we can see from current advisory, NukeSentinel itself has security
holes and can be exploited to attack website engine below.

Vulnerabilities: Critical Sql Injection in "nsbypass.php"

So let's look at script "includes/nsbypass.php" source code:

------------>[source code]<------------

if(isset($_COOKIE['admin']) && !empty($_COOKIE['admin'])) {
$abadmin = base64_decode($_COOKIE['admin']);
$abadmin = explode(":", $abadmin);
$a_aid = "$abadmin[0]";
$a_pas = "$abadmin[1]";
$num = $db->sql_numrows($db->sql_query("SELECT * FROM ".$prefix."_authors
WHERE `aid`='$a_aid' AND `pwd`='$a_pas'"));

------------>[/source code]<-----------

As many times before in phpnuke insecurities history the attack comes through
base64 encoding/decoding. After base64_decode() there can be single quotes in
"$abadmin", but no variable sanitize applied! And it is easy to see sql
injection possibilities here. This can lead to stealing arbitrary information
from underlying database, inlcuding admin username and password md5 hash.
Next step can be cracking hash to reveal plaintext password or using md5 hash
directly for cookie manipulation, both leading to gain phpnuke admin privileges.

Now why it is critical sql injection IMHO?

1. "register_globals" does not matter, because attack comes from "$_COOKIES".
2. "magic_quotes" does not matter either, thanks to base64 encoding.
3. Sentinel itself will not catch attack in this case :)
4. We don't need UNION, because sql injection is located in query, dealing
with authors table. So we can attack even websites, using oldest mysql 3.x
5. We can attack even without knowing table prefix, which is great news.

And is there anything, making attack harder or unreliable? I can see only one
factor - we need to use blind sql injection method, using timing attack.
There can be possibility for faster, half-blind method too, but that's will
not work in many cases.
Now - I have written proof-of-concept exploit, which will steal admin password
md5 hash in less than 10 minutes. This exploit can be found from:


//-----> See ya soon and have a nice day ;) <-----//

How to fix:

Let's hope, that NukeSentinel's new version will be out soon ...


Greets to ToXiC, LINUX, y3dips, Sm0ke, Heintz, slimjim100, Chb
and anyone else who know me!
Greetings to Raido Kerna.
Tervitusi Torufoorumi rahvale!


Janek Vind "waraxe"

Homepage: http://www.waraxe.us/

Copyright © by Waraxe IT Security Portal All Right Reserved.

Published on: 2007-09-25 (6876 reads)

[ Go Back ]
Top members by posts
waraxe  waraxe - 2407
vince213333  vince213333 - 736
pexli  pexli - 665
Mullog  Mullog - 539
demon  demon - 485
shai-tan  shai-tan - 477
Cyko  Cyko - 375
tsabitah  tsabitah - 328
y3dips  y3dips - 281
·Vuln: Microsoft Windows CVE-2015-0002 Local Privilege Escalation Vulnerability
·Vuln: Adobe Flash Player and AIR CVE-2015-0306 Unspecified Memory Corruption Vulnerability
·Vuln: Adobe Flash Player and AIR CVE-2015-0308 Use After Free Remote Code Execution Vulnerability
·Vuln: Adobe Flash Player and AIR CVE-2015-0301 Unspecified Security Vulnerability
·Bugtraq: [ MDVSA-2015:027 ] kernel
·Bugtraq: Facebook Bug Bounty #19 - Filter Bypass Web Vulnerability
·Bugtraq: File Pro Mini v5.2 iOS - Multiple Web Vulnerabilities
·Bugtraq: WiFi File Browser Pro v2.0.8 - Code Execution Vulnerability
·More rss feeds from SecurityFocus


Film DVD comments and reviews
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) 2004-2013 Janek Vind "waraxe"
Page Generation: 0.041 Seconds