当应用程序易受SQL注入攻击并且查询结果在应用程序的响应中返回时,可以使用UNION关键字从数据库中的其他表检索数据.这将导致SQL注入联合攻击. UNION关键字允许您执行一个或多个附加的SELECT查询,并将结果附加到原始查询.例如: SELECT a, b FROM table1 UNION SELECT c, d FROM table2 此SQL查询将返回一个包含两列的结果集,其中包含table_1中a列和b列以及table_2中c列和d列的值. 要使联合查询正常工作,必须满足两个关键要…
目录 SQL injection UNION attack, determining the number of columns returned by the query SQL injection UNION attack, determining the number of columns returned by the query 虽然进去一个商品页面,然后把包发到Repeater中,因为题目要求的是查询结果要返回空值,所以我们利用填充NULL的方式注入,只有NULL的数量与查询结果列数…
SQL injection is a code injection technique, used to attack data-driven applications, in which malicious SQL statements are inserted into an entry field for execution (e.g. to dump the database contents to the attacker).[1] SQL injection must exploit…
Portswigger web security academy:SQL injection 目录 Portswigger web security academy:SQL injection SQL injection vulnerability in WHERE clause allowing retrieval of hidden data SQL injection vulnerability allowing login bypass SQL injection UNION attac…
In our earlier tutorial on SQL Injection, one way to have prevented the SQL injection attack was by simply having the user input sanitized – which we briefly discussed. Since we are dealing with email addresses in our example, this means that we shou…
w SQL Injection Attacks and Defense Second Edition Exploiting second-order SQL injection Virtually every instance of SQL injection discussed in this book so far may be classified as “first-order” SQL injection. This is because the events involved al…
