Basic knowledge of SQL injection and basic knowledge of SQL Injection
What is SQL Injection)
The so-called SQL injection attack means that an attacker inserts an SQL command into the input field of a Web form or the query string requested by the
This article mainly introduces how to use the concat function in Mysql to execute SQL injection queries. the concat function has an unexpected effect in SQL injection queries. This article will explain how to use it, you can refer to the SQL
Mysql database uses the concat function to execute SQL Injection queries, mysqlconcat
SQL Injection statements sometimes use the replacement query technology, that is, to make the original query statement fail to find the result and make it run the
What is SQL injection (SQL injection)
A SQL injection attack is an attacker who inserts a SQL command into the input field of a Web form or a query string for a page request, tricking the server into executing a malicious SQL command. In some forms,
Knowledge about SQL Injection bypass and SQL Injection Bypass
I. Concept of bypassing waf
Start from step 1, analyze at, and then bypass.
1. Filter and, or
preg_match('/(and|or)/i', $id)Filtered injection: 1 or 1 = 1 1 and 1 = 1Bypassed injection: 1
SQL injection statements sometimes use the substitution query technology, that is, let the original query statements can not find the results of errors, and let the query to build their own execution, and the implementation of the results instead of
In front, we have installed the sqlol, open http://localhost/sql/, first jump to http://localhost/sql/select.php, we first test from the Select module.Slect module, with input processing and output processing, can be configured with different SQL
0x00 PrefaceSQL injection constructs the statement through user input to achieve the purpose. A word, do not believe any user input content, do a good job of protection.0x01 method of transfer of parametersThe method of transmitting parameters is
Although SQL injection has a lot of contact, in fact, not too much, but not the system, then through the sqli-libs system learning to summarize itNote: The first one to say in detail, the back of the new knowledge will be said, so the first must
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