bugtraq - Puppet Enterprise Web Interface Authentication Redirect

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Message-Id: <201610211641.u9LGf76w025498@sf01web3.securityfocus.com>
Date: Fri, 21 Oct 2016 16:41:07 GMT
From: apparitionsec@...il.com
To: bugtraq@...urityfocus.com
Subject: Puppet Enterprise Web Interface Authentication Redirect

[+] Credits: John Page aka hyp3rlinx	

[+] Website: hyp3rlinx.altervista.org

[+] Source:  http://hyp3rlinx.altervista.org/advisories/PUPPET-AUTHENTICATION-REDIRECT.txt

[+] ISR: ApparitionSec

Vendor:
==============
www.puppet.com

Product:
================================
Puppet Enterprise Web Interface 
Version < 2016.4.0

Puppet Enterprise is the leading platform for automatically delivering, operating and securing your infrastructure.

Vulnerability Type:
=========================
Authentication Redirect

CVE Reference:
==============
CVE-2016-5715

Vulnerability Details:
=====================

When logging into Puppet Enterprise Web Interface, users can be redirected to attacker controlled servers, if a user logs in
using an attacker supplied authentication link it can result in credential theft etc.

Fixed in version 2016.4.0

References:
https://puppet.com/security/cve/cve-2016-5715

Exploit code(s):
===============

Bypass character filters you need to pass double forward slashes "//" or the redirect will fail.

https://victim-puppet-server/auth/login?redirect=//attacker-server

Disclosure Timeline:
======================================
Vendor Notification: August 23, 2016
Vendor Acknowledgement: August 23, 2016
Vendor Releases Fix: in version 2016.4.0
October 17, 2016  : Public Disclosure

Exploitation Technique:
=======================
Remote

Severity Level:
================
Medium

[+] Disclaimer
The information contained within this advisory is supplied "as-is" with no warranties or guarantees of fitness of use or otherwise.
Permission is hereby granted for the redistribution of this advisory, provided that it is not altered except by reformatting it, and
that due credit is given. Permission is explicitly given for insertion in vulnerability databases and similar, provided that due credit
is given to the author. The author is not responsible for any misuse of the information contained herein and accepts no responsibility
for any damage caused by the use or misuse of this information. The author prohibits any malicious use of security related information
or exploits by the author or elsewhere.

hyp3rlinx