Sql Injection Challenge 5 Security Shepherd Jun 2026

If admin equals empty string? No.

Within a MySQL command parser, a double backslash ( \\ ) evaluates to a single, literal backslash character. Because the backslashes neutralize each other, the subsequent single quote ( ' ) becomes completely and active within the SQL interpreter. It breaks out of the intended query syntax and allows structural manipulation. Step-by-Step Exploitation Walkthrough

for position in range(1, key_length + 1): for ascii_code in range(32, 127): # Printable ASCII payload = f"ASCII(SUBSTRING((SELECT column_name FROM table_name WHERE row_condition), position, 1)) = ascii_code" if test_payload(payload): char = chr(ascii_code) target_string += char print(f"[*] Position position: char -> target_string") break

SELECT * FROM customers WHERE customerId="\\' OR 1=1; --" Sql Injection Challenge 5 Security Shepherd

But Challenge 5 stops at login success. The flag is returned upon successful admin login.

Master Class: Cracking the "SQL Injection Challenge 5" in OWASP Security Shepherd

SQL injection is a technique where an attacker inserts, or "injects," malicious SQL code into input fields, allowing them to manipulate the backend database. A successful attack can result in unauthorized data access, modification, or deletion. The root cause is typically treating user-supplied data as code rather than literal text. Understanding Security Shepherd SQLi Challenge 5 If admin equals empty string

Extract data from the database (e.g., retrieving the flag/key). Step-by-Step Solution Walkthrough 1. Initial Reconnaissance

Thus, final answer for the challenge:

Level 5 often implies that simple tricks are filtered. You may need to use tricks like: Encoding single quotes or spaces. Case Variation: Using UnIoN SeLeCt instead of UNION SELECT . Commenting: Utilizing /**/ to bypass space filtering. 5. Retrieving the Flag The flag is returned upon successful admin login

By transitioning to parameterized logic, the SQL interpreter treats the content inside userInputCode strictly as a raw text literal string—rendering any structural injections or logical statement variations entirely inert.

After empirical testing on Security Shepherd v3:

When this payload is processed by the flawed sanitization filter, the application alters the structural context of the query string:

The resulting query has effectively bypassed the string context, and the OR 1=1 condition evaluates to true, returning all rows from the customers table. The double dash ( -- ) comments out the rest of the original query, including the closing quotation marks and any additional conditions.