Graylog Collector 0.4.2 – Unquoted Service Path Privilege Escalation
# Exploit Title: Graylog Collector Service Path Privilege Escalation # Date: 10/14/2016 # Exploit Author: Joey Lane # Software Link: https://github.com/Graylog2/collector # Version: 0.4.2 # Tested on: Windows Server 2012 R2 Graylog Collector installs as a service with an unquoted service path. If the user installs this service in a directory containing a space, this will create a privilege escalation vulnerability. To properly exploit this vulnerability, a local attacker can insert an executable file in the path of the service. Rebooting the system or restarting the service will run the malicious executable with elevated privileges. This was tested on version 0.4.2, but may affect other versions as well. --------------------------------------------------------------------------- C:\sc qc GraylogCollector [SC] QueryServiceConfig SUCCESS SERVICE_NAME: GraylogCollector TYPE : 10 WIN32_OWN_PROCESS START_TYPE : 2 AUTO_START ERROR_CONTROL : 1 NORMAL BINARY_PATH_NAME : C:\graylog collector\bin\windows\graylog-collector-service-x86.exe //RS//GraylogCollector LOAD_ORDER_GROUP : TAG : 0 DISPLAY_NAME : Graylog Collector (GraylogCollector) DEPENDENCIES : Tcpip : Afd SERVICE_START_NAME : LocalSystem --------------------------------------------------------------------------- EXAMPLE: Using the BINARY_PATH_NAME listed above as an example, an executable named "graylog.exe" could be placed in "C:\", and it would be executed as the Local System user next time the service was restarted. |