During a web application test, you observe that replacing product_id=7 with product_id=7%20AND%201=2 removes a 147-byte section of the HTML, while using 1=1 restores it. The page shows no errors, and UNION or comment sequences are blocked. What SQL injection approach will most reliably let you enumerate table names under these constraints?
Out-of-band injection that exfiltrates data through DNS lookups
Boolean-based blind SQL injection using character-by-character comparisons
Time-based blind SQL injection that leverages BENCHMARK() or SLEEP() delays
UNION-based injection with inline comment obfuscation to bypass filters
The differing page length indicates that the application is evaluating the injected Boolean expression even though error messages are suppressed. Because UNION statements and inline comments are filtered, UNION-based and error-based attacks will not work. Time delays are unnecessary when a visible true/false condition already exists, and out-of-band channels require a separate network interaction that is not guaranteed to succeed. Crafting Boolean predicates such as "AND SUBSTRING((SELECT table_name FROM information_schema.tables LIMIT 1 OFFSET 0),1,1)='a'" and observing whether the long or short response appears allows a tester to infer each character of database objects, making Boolean-based blind SQL injection the most reliable method in this scenario.
Ask Bash
Bash is our AI bot, trained to help you pass your exam. AI Generated Content may display inaccurate information, always double-check anything important.
What is Boolean-based blind SQL injection?
Open an interactive chat with Bash
Why are UNION-based SQL injections and error-based attacks blocked here?
Open an interactive chat with Bash
How does SUBSTRING() help in Boolean-based SQL injection?
Open an interactive chat with Bash
What is Boolean-based blind SQL injection?
Open an interactive chat with Bash
What is the purpose of SUBSTRING in SQL injection?
Open an interactive chat with Bash
Why is UNION-based SQL injection not effective in this scenario?
Open an interactive chat with Bash
Certified Ethical Hacker (CEH)
Web Application Hacking
Your Score:
Report Issue
Bash, the Crucial Exams Chat Bot
AI Bot
Loading...
Loading...
Loading...
Pass with Confidence.
IT & Cybersecurity Package
You have hit the limits of our free tier, become a Premium Member today for unlimited access.
Military, Healthcare worker, Gov. employee or Teacher? See if you qualify for a Community Discount.
Monthly
$19.99
$19.99/mo
Billed monthly, Cancel any time.
3 Month Pass
$44.99
$14.99/mo
One time purchase of $44.99, Does not auto-renew.
MOST POPULAR
Annual Pass
$119.99
$9.99/mo
One time purchase of $119.99, Does not auto-renew.
BEST DEAL
Lifetime Pass
$189.99
One time purchase, Good for life.
What You Get
All IT & Cybersecurity Package plans include the following perks and exams .