While looking through the IIS log file of a web server, you find the following entries: What is evident from this log file?

While looking through the IIS log file of a web server, you find the following entries: What is evident from this log file?

• A. Web bugs
• B. SQL injection is possible
• C. Cross site scripting
• D. Hidden fields

Answer: (B)

The key idea being tested is how to recognize evidence of a SQL injection attempt in web server logs. If the log entries show user-supplied input containing SQL syntax or keywords that would alter a database query—for example strings like OR 1=1, UNION SELECT, or other SQL fragments embedded in query strings—this indicates the application is constructing SQL statements directly from input without proper parameterization. That means an attacker could modify the query logic, potentially bypassing authentication or extracting data, which is exactly what a SQL injection vulnerability enables. Web bugs would show as requests for a tiny image or beacon, not as SQL syntax in inputs. Cross-site scripting would typically involve script tags or HTML/JavaScript payloads echoed back in responses. Hidden fields pertain to HTML forms and don’t in themselves reveal a database-level vulnerability in the logs. So the presence of SQL-like payloads in the log strongly points to a SQL injection risk being possible. To mitigate, use parameterized queries, validate and sanitize input, apply least-privilege database accounts, and consider a web application firewall for additional protection.

The key idea being tested is how to recognize evidence of a SQL injection attempt in web server logs. If the log entries show user-supplied input containing SQL syntax or keywords that would alter a database query—for example strings like OR 1=1, UNION SELECT, or other SQL fragments embedded in query strings—this indicates the application is constructing SQL statements directly from input without proper parameterization. That means an attacker could modify the query logic, potentially bypassing authentication or extracting data, which is exactly what a SQL injection vulnerability enables.

Web bugs would show as requests for a tiny image or beacon, not as SQL syntax in inputs. Cross-site scripting would typically involve script tags or HTML/JavaScript payloads echoed back in responses. Hidden fields pertain to HTML forms and don’t in themselves reveal a database-level vulnerability in the logs. So the presence of SQL-like payloads in the log strongly points to a SQL injection risk being possible. To mitigate, use parameterized queries, validate and sanitize input, apply least-privilege database accounts, and consider a web application firewall for additional protection.