Expired Pastries

EasyWeb Security

Overview

Welcome to our state-of-the-art e-learning platform. We've just launched a suite of new courses, but our most legendary course, "Advanced Web Exploitation," seems to be locked away and marked as expired. A former developer mentioned that our new session management system is a bit... trusting of the client. Maybe time isn't as rigid as our servers believe it to be. Find a way to enroll in the past and retrieve the knowledge hidden within the forbidden curriculum. flag format: flag{}

Lab Details

Prerequisites & Requirements

Web State Management: Basic understanding of how HTTP cookies maintain session state.
Client-Side Security: Awareness of the "Never Trust the Client" principle in web architecture.
DOM/Storage Inspection: Proficiency in using browser-based debugging tools to inspect and modify application data.

What will you learn?

Session Manipulation: Identifying and exploiting vulnerabilities where sensitive logic (like expiration) is stored on the client side.
Temporal Access Control Bypass: Manipulating date/time metadata within a session to access restricted or expired resources.
Cookie Interception & Modification: Using Developer Tools to perform real-time edits to persistent storage.
Insecure Session Design: Understanding why servers should validate timestamps against their own system clock rather than user-provided cookies.

Tools

Browser Developer Tools: Specifically the Application (Chrome) or Storage (Firefox) tabs.

Job Positions

Penetration Tester

Expired Pastries

Overview

Lab Details

Job Positions

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