Use "allow-lists" to ensure only expected characters (like letters and numbers) are accepted [7].
: DUAL is a special one-row table in Oracle used to execute functions that don't need data from a specific table [6]. Use "allow-lists" to ensure only expected characters (like
If you are seeing this in your logs, your system is being scanned for vulnerabilities. You should take the following steps immediately: You should take the following steps immediately: The
The goal of this specific "Sleep" command isn't to steal data immediately, but to . If the application takes exactly 5 seconds longer than usual to respond when this string is entered, the attacker knows the database is vulnerable to SQL injection [2]. Once confirmed, they can use similar time-based techniques to extract sensitive data one character at a time. How to Protect Your System How to Protect Your System It looks like
It looks like you've shared a snippet of code designed for an attack, specifically a time-based blind injection [1, 2]. Technical Breakdown
Ensure your database user account does not have permission to execute sensitive packages like DBMS_PIPE unless absolutely necessary [8].