Graylog Collector 0.4.2 - Unquoted Service Path Privilege Escalation

EDB-ID:

40538

CVE:

N/A

Author:

Joey Lane

Type:

local

Platform:

Windows

Published:

2016-10-14

# 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.