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Microsoft Exchange Open Redirect

Microsoft Exchange Open Redirect
Posted Mar 28, 2018
Authored by hyp3rlinx | Site hyp3rlinx.altervista.org

Microsoft Exchange suffers from an open redirect vulnerability.

tags | exploit
advisories | CVE-2016-3378
SHA-256 | 984f3e5bf9a46dde0835b0d4970d3406f20883bb6d60759b4da0a53b6e0ee2ab

Microsoft Exchange Open Redirect

Change Mirror Download
[+] Credits: John Page (aka hyp3rlinx)    
[+] Website: hyp3rlinx.altervista.org
[+] Source: http://hyp3rlinx.altervista.org/advisories/MICROSOFT-EXCHANGE-SERVER-OPEN-REDIRECT-CVE-2016-3378.txt
[+] ISR: Apparition Security



Vendor:
=================
www.microsoft.com



Product:
===========
Microsoft Exchange Server



Vulnerability Type:
===================
Open redirect



CVE Reference:
==============
CVE-2016-3378
MS16-108



Security Issue:
================
Microsoft Exchange Server is vulnerable to Open redirect allowing attackers who either send a link or pop a web page in a new window
the possibility to trick victims to either click "Go back" or the "return to sharepoint link" that will then redirect users to arbitrary
web sites where attackers can then conduct phishing attacks or trick a user to download malicious executables etc.


Vulnerable: Microsoft Exchange Server 2016 Cumulative Update 2
Microsoft Exchange Server 2016 Cumulative Update 1
Microsoft Exchange Server 2013 SP1 0
Microsoft Exchange Server 2013 Cumulative Update 13
Microsoft Exchange Server 2013 Cumulative Update 12



References:
===========
https://securitytracker.com/id/1036778
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=cve-2016-3378



Exploit/POC:
=============
1) access the URL (and login if need be)

2) click the link where says "Go back to the SharePoint site for now" and BOOM!


https://outlook.office365.com/ecp/TeamMailbox/NewSharePointTeamMailbox.aspx?exsvurl=0&SPUrl=http%3a%2f%2fhyp3rlinx.altervista.org&Title=Go%20back&SPTMAppUrl=https://outlook.office365.com&realm=https://outlook.office365.com&wa=wsignin1.0




Network Access:
===============
Remote



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



Disclosure Timeline:
=============================
Vendor Notification: December 22, 2015
Been fixed by MS a long time now...
March 27, 2018 : Public Disclosure



[+] 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. All content (c).

hyp3rlinx
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