Avira 14.0.7.342 - (avguard.exe) Service Trusted Path Privilege Escalation

2014-12-15 14:05:08

# Exploit Title: Avira 14.0.7.342 (avguard.exe) Service Trusted Path Privilege Escalation
# Date: 11/12/2014
#Author: Hadji Samir [email protected]
#Product web page: http://www.avira.com/
#Affected version: 14.0.7.342
#Tested on: Windows 7 (FR)




Avira free antivirus 14.0.7.342
(avguard.exe)
Avira free antivirus 14.0.7.342 contains a flaw in the 'avguard.exe' file that may reportedly allow gaining access to unauthorized privileges.
The issue is due to an unquoted search path, which may allow a local attacker
to inject arbitrary code in the root path.


C:\Users\samir>sc qc AntiVirService
[SC] QueryServiceConfig réussite(s)

SERVICE_NAME: AntiVirService
TYPE : 10 WIN32_OWN_PROCESS
START_TYPE : 2 AUTO_START
ERROR_CONTROL : 1 NORMAL
BINARY_PATH_NAME : "C:\Program Files\Avira\AntiVir Desktop\avguard.exe"
LOAD_ORDER_GROUP :
TAG : 0
DISPLAY_NAME : Avira Real-Time Protection
DEPENDENCIES :
SERVICE_START_NAME : LocalSystem

C:\Users\samir>icacls "C:\Program Files\Avira\AntiVir Desktop\avguard.exe"
C:\Program Files\Avira\AntiVir Desktop\avguard.exe AUTORITE NT\Système:(I)(F)
BUILTIN\Administrateurs:(I)(F)
BUILTIN\Utilisateurs:(I)(RX)

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Fixes

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