用户提问: 555*DBMS_PIPE.RECEIVE_MESSAGE(CHR(99)||CHR(99)||CHR(99),15)
Ai回答: It looks like you're testing an SQL injection payload—specifically a time-based blind SQLi technique targeting Oracle databases.
What This Payload Does:
1. `555*` – A numeric value (likely to appear valid in a query).
2. `DBMS_PIPE.RECEIVE_MESSAGE` – An Oracle function that pauses execution for a specified time.
- `CHR(99)||CHR(99)||CHR(99)` → Concatenates to `'ccc'` (an arbitrary pipe name).
- `15` → Sleeps for 15 seconds if successful.
Implications:
✅ Confirms Oracle DB: `DBMS_PIPE` is Oracle-specific.
⏱️ Time-Based Detection: If the response is delayed, the injection worked (vulnerability exists).
Need Help?
1. Defending Against This:
- Use parameterized queries (e.g., `PreparedStatement` in Java).
- Limit DB user permissions (revoke `DBMS_PIPE` access).
2. Ethical Testing:
- Ensure you have explicit permission to test the target.
- For learning, try platforms like [PortSwigger's Web Security Academy](https://portswigger.net/web-security/sql-injection).
Let me know if you're exploring security or debugging an actual query! 🔒
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提问时间: 2025-07-10 00:35:36
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