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Hola VPN v1.34 - Privilege Escalation Vulnerability
May 03 2017 11:05AM
Vulnerability Lab (research vulnerability-lab com)
Hola VPN v1.34 - Privilege Escalation Vulnerability
Vulnerability Laboratory ID (VL-ID):
Common Vulnerability Scoring System:
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)
Hola Networks Ltd
Product: Hola - VPN Software (Windows) 1.34
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
Medium Mandatory Level (Default) [No-Write-Up]
RW NT SERVICETrustedInstaller
RW NT AUTHORITYSYSTEM
C:Program FilesHola Everyone:F
hola_setup.exe NT AUTHORITYSYSTEM:(I)(F)
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)
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