用户提问: -1 OR 5*5=26
Ai回答: Your payload (`-1 OR 5*5=26`) is a variation of a basic SQL injection test, but this time with a false condition (`5*5=26` evaluates to `False`). Here’s how it behaves in different contexts:
How This Works
1. In a Vulnerable Query
If injected into a query like:
```sql
SELECT * FROM products WHERE id = -1 OR 5*5=26
```
- `-1` → Likely no match (unless `-1` is a valid ID).
- `5*5=26` → Always false (`25 ≠ 26`), so the `OR` condition fails.
- Result: The query returns no rows (or only rows where `id = -1` exists).
2. Purpose of Testing
- Attackers use `false` conditions to probe for error messages or blind SQLi (time delays, boolean-based responses).
- If the application behaves differently (e.g., shows an error or empty page), it may hint at SQLi vulnerability.
Why Use a False Condition?
- Error-Based SQLi: Trigger database errors (e.g., `You have an error in your SQL syntax`).
- Boolean-Based Blind SQLi: Detect differences between `true`/`false` responses (e.g., "Product not found" vs. "Welcome back").
- Filter Bypass: Some WAFs block `1=1` but miss less obvious math (`5*5=25`).
Ethical Note
⚠️ Never test this on live systems without permission. Use legal alternatives:
- Labs: [PortSwigger SQLi Labs](https://portswigger.net/web-security/sql-injection)
- CTFs: [Hack The Box](https://www.hackthebox.com/), [TryHackMe](https://tryhackme.com/)
- Bug Bounties: Report vulnerabilities responsibly (HackerOne, Bugcrowd).
Want to Exploit This Further?
Try these (in a lab environment):
```sql
-1 OR 5*5=25 -- True condition (returns all rows)
-1 OR 1=2 -- False condition (returns nothing)
-1' OR '1'='1 -- Classic string-based SQLi
-1' SLEEP(5)-- -- Time-based blind SQLi test
```
Need a deeper breakdown? Let me know! 🔍
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提问时间: 2025-06-16 20:23:59
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