SQL
Hack Responsibly.
Always ensure you have explicit permission to access any computer system before using any of the techniques contained in these documents. You accept full responsibility for your actions by applying any knowledge gained here.
SQLi - SQL Injection
Blind SQL injection UNIoN queries: Ippsec:HacktheBox - Charon use CONCAT("x","x")
SQL Injection Tips
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-> Comments in Linux
--+
-> Comments in Windows
%23 (#)
-> Hash Symbol
%2527 (')
-> to bypass urldecode(urldecode(htmlspecialchars(, ENT_QUOTES)));
String concatenation
You can concatenate together multiple strings to make a single string.
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Substring
You can extract part of a string, from a specified offset with a specified length. Note that the offset index is 1-based. Each of the following expressions will return the string ba
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Comments
You can use comments to truncate a query and remove the portion of the original query that follows your input.
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Database version
You can query the database to determine its type and version. This information is useful when formulating more complicated attacks.
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Database contents
You can list the tables that exist in the database, and the columns that those tables contain.
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Conditional errors
You can test a single boolean condition and trigger a database error if the condition is true.
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Batched (or stacked) queries
You can use batched queries to execute multiple queries in succession. Note that while the subsequent queries are executed, the results are not returned to the application. Hence this technique is primarily of use in relation to blind vulnerabilities where you can use a second query to trigger a DNS lookup, conditional error, or time delay.
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Note: With MySQL, batched queries typically cannot be used for SQL injection. However, this is occasionally possible if the target application uses certain PHP or Python APIs to communicate with a MySQL database.
Time delays
You can cause a time delay in the database when the query is processed. The following will cause an unconditional time delay of 10 seconds.
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Conditional time delays
You can test a single boolean condition and trigger a time delay if the condition is true.
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Manual UNION SQLite Injection
Table
Columns (as command)
Values (payload depends on the columns structure)
Manual UNION SQL Injection
Table
Columns
Values
Using Newline
Bypass preg_replace
Misc
get shell in mysql: \! /bin/sh
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