312-50v13 Exam Dumps | In an intricate web application architecture using an Oracle database, you, as a security analyst, have

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Certified Ethical Hacker Exam (CEHv13)
ECCouncil.312-50v13.v2025-05-19.q235
Question 62

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Question 62/235

In an intricate web application architecture using an Oracle database, you, as a security analyst, have identified a potential SQL Injection attack surface. The database consists of 'x' tables, each with y columns.
Each table contains z1 records. An attacker, well-versed in SQLi techniques, crafts 'u' SQL payloads, each attempting to extract maximum data from the database. The payloads include UNION SELECT' statements and 'DBMS_XSLPPOCESSOR.READ2CLOB' to read sensitive files. The attacker aims to maximize the total data extracted E=xyz'u'. Assuming 'x=4\ y=2\ and varying z' and 'u\ which situation is likely to result in the highest extracted data volume?

A. z=400. u=4: The attacker constructs A SQLpayloads, each focusing on tables with 400 records, influencing all columns of all tables

B. z=550, u=Z Here, the attacker formulates 2 SQL payloads and directs them towards tables containing
550 records, impacting all columns and tables

C. z=600. u=2: The attacker devises 2 SQL payloads. each aimed at tables holding 600 records, affecting all columns across all tables

D. Az=500. u=3: The attacker creates 3 SQL payloads and targets tables with 500 records each, exploiting all columns and tables

Correct Answer: C

The total data extracted by the attacker is E=xyz'u', where x is the number of tables, y is the number of columns, z is the number of records, and u is the number of SQL payloads. To maximize E, the attacker would want to choose the highest values of z and u, while keeping x and y constant. Therefore, the situation where z=600 and u=2 would result in the highest extracted data volume, as E=42600*2=9600. The other situations would result in lower values of E, as shown below:
* A: E=42400*4=12800
* B: E=42550*2=8800
* D: E=42500*3=12000
The attacker uses UNION SELECT statements to combine the results from different tables and columns, and DBMS_XSLPPOCESSOR.READ2CLOB to read sensitive files from the database server12. These techniques can bypass input validation and pattern matching measures that are based on the application's responses3.
References:
* 1: DBMS_XSLPROCESSOR - Oracle Help Center
* 2: DBMS_XSLPROCESSOR.READ2CLOB Example Script to Read a file data into ...
* 3: Attack Surface Analysis - OWASP Cheat Sheet Series

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