WinCvs 2.1.1.1 Build 1 Privilege Escalation

2016-10-26
ID: 88536
CVE: None
Download vulnerable application: None
[+] Credits: John Page aka hyp3rlinx

[+] Website: hyp3rlinx.altervista.org

[+] Source:
http://hyp3rlinx.altervista.org/advisories/WINCVS-PRIVILEGE-ESCALATION.txt

[+] ISR: ApparitionSec



Vendor:
======================
cvsgui.sourceforge.net
www.wincvs.org


Product:
===========
WinCvs v2.1.1.1 (Build 1)
downloads as wincvs-2.0.2.4
v2.0.2.4


WinCVS is a free app for Windows that will help you simplify the
development of files for groups of people working on
the same software project.


Vulnerability Type:
=====================
Privilege Escalation



CVE Reference:
==============
N/A



Vulnerability Details:
=====================

WinCvs.exe installs a service with an unquoted service path running with
SYSTEM privileges, to exploit a local attacker must place
a malicious executable file named "Program.exe" in the path of the service.
After service restart or system reboot, it could
potentially allow an authorized local user to execute arbitrary code with
elevated privileges on the system.



Proof:
======

C:\Usershyp3rlinx>sc qc CVS
[SC] QueryServiceConfig SUCCESS

SERVICE_NAME: CVS
        TYPE               : 110  WIN32_OWN_PROCESS (interactive)
        START_TYPE         : 2   AUTO_START
        ERROR_CONTROL      : 1   NORMAL
        BINARY_PATH_NAME   : C:\Program Files (x86)\cvsnt\cvsservice.exe
        LOAD_ORDER_GROUP   :
        TAG                : 0
        DISPLAY_NAME       : CVSNT
        DEPENDENCIES       :
        SERVICE_START_NAME : LocalSystem



Exploitation Technique:
=======================
Local



Severity Level:
================
Medium




[+] Disclaimer
The information contained within this advisory is supplied "as-is" with no
warranties or guarantees of fitness of use or otherwise.
Permission is hereby granted for the redistribution of this advisory,
provided that it is not altered except by reformatting it, and
that due credit is given. Permission is explicitly given for insertion in
vulnerability databases and similar, provided that due credit
is given to the author. The author is not responsible for any misuse of the
information contained herein and accepts no responsibility
for any damage caused by the use or misuse of this information. The author
prohibits any malicious use of security related information
or exploits by the author or elsewhere.

hyp3rlinx
1-4-2 (www01)