1 AND 1=2 UNION SELECT 1,column_name,3 FROM information_schema.columns WHERE table_name='administrators' -- -
This comprehensive technical guide breaks down the core concepts, provides a step-by-step walkthrough to solve the challenge, and explains how developers can systematically mitigate this underlying vulnerability. Understanding the Vulnerability Focus
The OWASP Security Shepherd is a flagship training platform designed to help developers and security professionals sharpen their skills in identifying and exploiting web application vulnerabilities. Among its many challenges, the (often referred to as Challenge 5) stands out as a critical lesson for understanding how even escaping mechanisms can fail, leading to a full database compromise.
Why AND 1=2 ? It ensures the first part of the query returns zero rows, leaving only our Union results to be displayed.
When an attacker submits a custom string containing a backslash followed by a single quote ( \' ), the flawed application algorithm iterates over that input blindly:
Query becomes: WHERE username='admin' AND password='' = ''
For position 1..length:
The challenge page displays an input field, typically used for a VIP Coupon Code check or similar database queries. The backend database query looks similar to this:
Now, if the developer does not sanitize input, an attacker can inject logic:
Now, go inject with purpose.
For Challenge 5, the magic number is often or 4 columns.