Hola VPN version 1.34 suffers from a privilege escalation vulnerability.
ceb67598c0f9fe5e48f0c01985c2e93bDocument Title:
===============
Hola VPN v1.34 - Privilege Escalation Vulnerability
References (Source):
====================
https://www.vulnerability-lab.com/get_content.php?id=2062
Release Date:
=============
2017-05-03
Vulnerability Laboratory ID (VL-ID):
====================================
2062
Common Vulnerability Scoring System:
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3.2
Vulnerability Class:
====================
Privilege Escalation
Product & Service Introduction:
===============================
Hola's goal is to make the internet faster, more open, and cheaper to operate. Hola is a collaborative (P2P) internet -- Hola works by sharing
the idle resources of its users for the benefit of all. Hola provides several products based on this resource sharing technology:
Hola's VPN network allows consumers to browse the web privately, securely, and freely. Making the world wide web worldwide again. Hola is used
by over 80 million people! Luminati has disrupted the way businesses conduct brand monitoring (checking the prices of their products in various stores),
self-test (checking how their corporate site looks from multiple countries), anti ad-fraud and so on, by providing them a privacy network. Hola's Video
CDN changes the game in video delivery. Designed as a service for video publishers, HolaCDN makes videos start faster, buffer less, and at a fraction
of the costs of traditional businesses.
(Copy of the Vendor Homepage: http://hola.org/faq#intro-howfree )
Abstract Advisory Information:
==============================
The vulnerability laboratory core research team discovered an privilege escalation vulnerability in the official Hola VPN v1.34 client software.
Vulnerability Disclosure Timeline:
==================================
2016-05-03: Public Disclosure (Vulnerability Laboratory)
Discovery Status:
=================
Published
Affected Product(s):
====================
Hola Networks Ltd
Product: Hola - VPN Software (Windows) 1.34
Exploitation Technique:
=======================
Local
Severity Level:
===============
Medium
Technical Details & Description:
================================
A local privilege escalation vulnerability has been discovered in the official Hola VPN v1.34 client software.
The local security vulnerability allows an attackers to gain higher access privileges by exploitation of an
insecure permission misconfiguration.
The software suffers from a local privilege escalation vulnerability. Users are able to change the files with
executable access to a binary of choice. The issue is located in the misconfigured permission values with the
`F`(full) flag in the users and everyone group. The group/user permission for the path is assigned to the
everyone group. Local attackers could exploit the vulnerability by a replace of the `7za.exe` or
`hola.exe`...etc files with a malicious executable file. The malicious file is exectuable with the
local system user permissions.
The security risk of the vulnerability is estimated as medium (CVSS 3.2). Exploitation of the software vulnerability
requires a low privilege system user account with restricted access and without user interaction. Successful exploitation
of the vulnerability results in system process compromise and further manipulation or exploitation to compromise the
local computer operating system.
Proof of Concept (PoC):
=======================
The local privilege escalation vulnerability can be exploited by local attackers without user interaction and with system user account.
For security demonstration or to reproduce the security vulnerability follow the provided information and steps below to continue.
--- Session Logs (Privileges) ---
C:Program FilesHolaapp Everyone:F
C:Program FilesHoladb Everyone:F
C:Program FilesHolahola_svc.exe.cid Everyone:F
C:Program FilesHolahola_updater.exe.cid Everyone:F
C:Program FilesHolalog Everyone:F
C:Program FilesHolatemp Everyone:F
C:Program FilesHola
Medium Mandatory Level (Default) [No-Write-Up]
RW Everyone
FILE_ALL_ACCESS
RW NT SERVICETrustedInstaller
FILE_ALL_ACCESS
RW NT AUTHORITYSYSTEM
FILE_ALL_ACCESS
RW BUILTINAdministrators
FILE_ALL_ACCESS
R BUILTINUsers
FILE_LIST_DIRECTORY
FILE_READ_ATTRIBUTES
FILE_READ_EA
FILE_TRAVERSE
SYNCHRONIZE
READ_CONTROL
C:Program FilesHola Everyone:F
NT SERVICETrustedInstaller:(ID)F
NT SERVICETrustedInstaller:(CI)(IO)(ID)F
NT AUTHORITYSYSTEM:(ID)F
NT AUTHORITYSYSTEM:(OI)(CI)(IO)(ID)F
BUILTINAdministrators:(ID)F
BUILTINAdministrators:(OI)(CI)(IO)(ID)F
BUILTINUsers:(ID)R
BUILTINUsers:(OI)(CI)(IO)(ID)(special access:)
GENERIC_READ
GENERIC_EXECUTE
CREATOR OWNER:(OI)(CI)(IO)(ID)F
7za.exe Everyone:(F)
NT AUTHORITYSYSTEM:(I)(F)
BUILTINAdministrators:(I)(F)
BUILTINUsers:(I)(RX)
hola.exe Everyone:(F)
NT AUTHORITYSYSTEM:(I)(F)
BUILTINAdministrators:(I)(F)
BUILTINUsers:(I)(RX)
hola_setup.exe NT AUTHORITYSYSTEM:(I)(F)
BUILTINAdministrators:(I)(F)
BUILTINUsers:(I)(RX)
hola_svc.exe Everyone:(F)
NT AUTHORITYSYSTEM:(I)(F)
BUILTINAdministrators:(I)(F)
BUILTINUsers:(I)(RX)
hola_updater.exe Everyone:(F)
NT AUTHORITYSYSTEM:(I)(F)
BUILTINAdministrators:(I)(F)
BUILTINUsers:(I)(RX)
Security Risk:
==============
The security risk of the local privilege escalation vulnerability in the Hola VPN v1.34 client software is estimated as medium (CVSS 3.2).
Credits & Authors:
==================
Vulnerability Laboratory [Core Research Team] - SaifAllah benMassaoud (http://www.vulnerability-lab.com/show.php?user=SaifAllahbenMassaoud)
Disclaimer & Information:
=========================
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