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File Replication Pro 7.5.0 Insecure Permissions / Privilege Escalation

CVE Category Price Severity
CVE-2023-26918 CWE-310 Unknown High
Author Risk Exploitation Type Date
Unknown High Local 2023-04-14
CVSS
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

CVSS vector description

Our sensors found this exploit at: https://cxsecurity.com/ascii/WLB-2023040054

Below is a copy:

File Replication Pro 7.5.0 Insecure Permissions / Privilege Escalation
# Exploit Title: File Replication Pro 7.5.0 - Password disclosure/reset & PrivEsc 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.

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