CVE-2018-16156 – PaperStream IP (TWAIN) 1.42.0.5685 - Local Privilege Escalation

https://notcve.org/view.php?id=CVE-2018-16156

In PaperStream IP (TWAIN) 1.42.0.5685 (Service Update 7), the FJTWSVIC service running with SYSTEM privilege processes unauthenticated messages received over the FjtwMkic_Fjicube_32 named pipe. One of these message processing functions attempts to dynamically load the UninOldIS.dll library and executes an exported function named ChangeUninstallString. The default install does not contain this library and therefore if any DLL with that name exists in any directory listed in the PATH variable, it can be used to escalate to SYSTEM level privilege. En PaperStream IP (TWAIN) 1.42.0.5685 (Service Update 7), el servicio FJTWSVIC que se ejecuta con el privilegio de SYSTEM procesa los mensajes no autenticados recibidos a través de la tubería con nombre FjtwMkic_Fjicube_32. Una de estas funciones de procesamiento de mensajes intenta cargar dinámicamente la biblioteca UninOldIS.dll y ejecuta una función exportada llamada ChangeUninstallString. • https://www.exploit-db.com/exploits/49382 https://github.com/securifera/CVE-2018-16156-Exploit http://packetstormsecurity.com/files/160832/PaperStream-IP-TWAIN-1.42.0.5685-Local-Privilege-Escalation.html https://www.securifera.com/advisories/cve-2018-16156 • CWE-426: Untrusted Search Path •