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Abyss Web Server X1 2.11.1 Privilege Escalation

Abyss Web Server X1 2.11.1 Privilege Escalation
Posted Oct 5, 2016
Authored by Tulpa

Abyss Web Server X1 version 2.11.1 suffers from an unquoted service path privilege escalation vulnerability.

tags | exploit, web
MD5 | f0b0aff0a88bb4d5bedd537d5129bc17

Abyss Web Server X1 2.11.1 Privilege Escalation

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# Exploit Title: Abyss Web Server X1 2.11.1 Multiple Local Privilege Escalation
# Date: 05/10/2016
# Exploit Author: Tulpa
# Contact: tulpa@tulpa-security.com
# Author website: www.tulpa-security.com
# Author twitter: @tulpa_security
# Vendor Homepage: http://aprelium.com/
# Application Download: http://aprelium.com/abyssws/download.php
# Version: Software Version 2.11.1
# Tested on: Windows 7 x86
# Shout-out to carbonated and ozzie_offsec

1. Description:

Abyss Web Server installs a service called 'AbyssWebServer' with an unquoted service path running with SYSTEM privileges.
This could potentially allow an authorized but non-privileged local
user to execute arbitrary code with elevated privileges on the system. Abyss Web Server also suffers from weak file and folder permissions which could allow

an unauthorized user to swop out executable files with their own payload.

2. Proof

C:\Program Files>sc qc AbyssWebServer
[SC] QueryServiceConfig SUCCESS

SERVICE_NAME: AbyssWebServer
TYPE : 10 WIN32_OWN_PROCESS
START_TYPE : 2 AUTO_START
ERROR_CONTROL : 1 NORMAL
BINARY_PATH_NAME : C:\Abyss Web Server\abyssws.exe --service
LOAD_ORDER_GROUP :
TAG : 0
DISPLAY_NAME : Abyss Web Server
DEPENDENCIES :
SERVICE_START_NAME : LocalSystem


3. Exploit:

A successful attempt would require the local user to be able to insert their
code in the system root path undetected by the OS or other security applications
where it could potentially be executed during application startup or reboot.
If successful, the local user's code would execute with the elevated privileges
of the application.

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