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Microsoft Resnet DNS Configuration Issue

Microsoft Resnet DNS Configuration Issue
Posted Aug 16, 2017
Authored by SaifAllah benMassaoud | Site vulnerability-lab.com

Microsoft Resnet suffered from an insecure DNS configuration vulnerability.

tags | advisory
MD5 | 7b768fb106a4eb7f6c4c990a464256ce

Microsoft Resnet DNS Configuration Issue

Change Mirror Download
Document Title:
===============
Microsoft Resnet - DNS Configuration Web Vulnerability


References (Source):
====================
https://www.vulnerability-lab.com/get_content.php?id=2087

Acknowledgements: https://technet.microsoft.com/en-us/security/cc308589.aspx


Release Date:
=============
2017-08-16


Vulnerability Laboratory ID (VL-ID):
====================================
2087


Common Vulnerability Scoring System:
====================================
6.4


Vulnerability Class:
====================
Insecure Configuration Management


Current Estimated Price:
========================
2.000a! - 3.000a!


Product & Service Introduction:
===============================
Microsoft Corporation is an American multinational technology company with headquarters in Redmond, Washington. It develops, manufactures,
licenses, supports and sells computer software, consumer electronics, personal computers, and services. Its best known software products
are the Microsoft Windows line of operating systems, the Microsoft Office suite, and the Internet Explorer and Edge web browsers. Its flagship
hardware products are the Xbox video game consoles and the Microsoft Surface tablet lineup. As of 2016, it is the world's largest software maker
by revenue, and one of the world's most valuable companies. The word "Microsoft" is a portmanteau of microcomputer and software.

(Copy of the Homepage: https://en.wikipedia.org/wiki/Microsoft )


Abstract Advisory Information:
==============================
The vulnerability laboratory core research team discovered a dns configuration ulnerability in the official Microsoft Resnet online service web-application.


Vulnerability Disclosure Timeline:
==================================
2017-06-16: Researcher Notification & Coordination (SaifAllah benMassaoud)
2017-06-16: Vendor Notification (Security Department)
2017-07-07: Vendor Fix/Patch (Service Developer Team)
2017-08-15: Security Acknowledgements (Security Department)
2017-08-16: Public Disclosure (Vulnerability Laboratory)


Discovery Status:
=================
Published


Affected Product(s):
====================

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


Severity Level:
===============
High


Technical Details & Description:
================================
A dns vulnerability has been discovered in the official Microsoft Resnet online service web-application.
The remote vulnerability allows remote attacker to hijack the inactive Microsoft Resnet subdomain service web-application
by a sign up to microsoft azure service. Afterwards serve content for the proof local. The microsoft resnet subdomain and
azure service is vulnerable to such typ of attacks. The dns answer cname performed by the azure app service and lead to
a take over of the involved resnet subddomain.

The issue could allow an attacker to store something malicious by uploading a web page to make a pretty convincing phishing page.
The issue could allow an attacker to deface the microsoft resnet service web application and web-server system. The problematic
allows an attacker to make inject codes with persistent attack vector.

The vulnerability is located in the dns configuration of the cname record that points resnet.microsoft.com to
resnetportal-prod.azurewebsites.net "Microsoft Azure app service ", but microsoft has not yet configuared azure to
recognize it because the service is inactive.

The security risk of the vulnerability is estimated as high. Exploitation of the vulnerability requires a privileged web-application
user account and high or medium user interaction. Successful exploitation of the vulnerability results in dns hijack and subdomain compromise.

Vulnerable Service(s):
[+] resnet.microsoft.com


Proof of Concept (PoC):
=======================
The dns vulnerability can be exploited by remote attackers with high privilege of the web-application and lhigh or medium user interaction.
For security demonstration or to reproduce the vulnerability follow the provided information and steps below to continue.


--- PoC Session Logs ---
- DNS Record :
; <<>> DiG 9.7.0-P1 <<>> resnet.microsoft.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 55595
;; flags: qr rd ra; QUERY: 1, ANSWER: 4, AUTHORITY: 0, ADDITIONAL: 0
-
;; QUESTION SECTION:
;resnet.microsoft.com. IN A
-
;; ANSWER SECTION:
resnet.microsoft.com. 5 IN CNAME resnetportal-prod.azurewebsites.net.
resnetportal-prod.azurewebsites.net. 5 IN CNAME waws-prod-mwh-001.vip.azurewebsites.windows.net.
waws-prod-mwh-001.vip.azurewebsites.windows.net. 5 IN CNAME waws-prod-mwh-001.cloudapp.net.
waws-prod-mwh-001.cloudapp.net. 5 IN A 13.66.226.80


Solution - Fix & Patch:
=======================
2017-07-07: Vendor Fix/Patch (Microsoft Developer Team - Online Services)


Security Risk:
==============
The security risk of dns vulnerability in the microsoft resnet service is estimated as high (CVSS 6.4)


Credits & Authors:
==================
Vulnerability Laboratory [Core Research Team] S.AbenMassaoud [saifmassaoudi18@gmail.com]
Profile: https://www.vulnerability-lab.com/show.php?user=S.AbenMassaoud


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 Labs or its
suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability mainly for incidental
or consequential 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. We have no need for criminal activities or membership requests. We do not publish advisories
or vulnerabilities of religious-, militant- and racist- hacker/analyst/researcher groups or individuals. We do not publish trade researcher mails,
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