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When an application is vulnerable to SQL injection, and the results of the query are returned within the application's responses, you can use the UNION keyword to retrieve data from other tables within the database. This is commonly known as a SQL injection UNION attack.
SQL Injection Using UNION. Understanding how to create a valid UNION-based attack to extract information. UNION-based attacks allow the tester to easily extract information from the database.
Oracle Error/Union based SQL Injection Cheatsheet. Detecting the vulnerability. The most common way to detect a SQLi vulnerability, is by inserting a ' in the end of GET/POST parameter value: http://domain.com/index.php?id=1' If vulnerable, the website might show an SQL syntax error.
SQL injection cheat sheet. This SQL injection cheat sheet contains examples of useful syntax that you can use to perform a variety of tasks that often arise when performing SQL injection attacks. String concatenation. You can concatenate together multiple strings to make a single string. Substring.
The UNION operator is a set operator that combines result sets of two or more SELECT statements into a single result set. The following illustrates the syntax of the UNION operator that combines the result sets of two queries: SELECT column_list_1 FROM T1 UNION SELECT column_list_1 FROM T2; Code language: SQL (Structured Query Language) (sql)
Web Security Academy. SQL injection. Examining the database. Lab: SQL injection attack, querying the database type and version on Oracle. PRACTITIONER. This lab contains a SQL injection vulnerability in the product category filter. You can use a UNION attack to retrieve the results from an injected query.
On the SQL injection cheat sheet are two different methods of querying the database version on Oracle. The SELECT version FROM v$instance only returns the version number, the first one, SELECT banner FROM v$version, returns the full version string that is requested.
