Consider a web app that builds a SQL query by concatenating user input for a search term. How can combining string concatenation with improper escaping lead to data leaks?

hard📝 Application Q9 of 15

SQL - Security Basics

AThe query will only return empty results

BThe database will reject all queries

CUser input will be encrypted automatically

DAttackers can inject commands to read unauthorized data

Step-by-Step Solution

Solution:

Step 1: Analyze concatenation with poor escaping
Improper escaping fails to block special characters in input.
Step 2: Understand impact on data security
Attackers can craft inputs to read or modify data they shouldn't access.
Final Answer:
Attackers can inject commands to read unauthorized data -> Option D
Quick Check:
Poor escaping + concatenation = data leaks [OK]

Quick Trick: Escape inputs properly or use parameters to avoid leaks [OK]

Common Mistakes:

Assuming database rejects all queries
Thinking input encrypts automatically
Believing queries return empty

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More SQL Quizzes

Consider a web app that builds a SQL query by concatenating user input for a search term. How can combining string concatenation with improper escaping lead to data leaks?

Step 1: Analyze concatenation with poor escaping

Step 2: Understand impact on data security

Final Answer:

Quick Check:

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