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+
+# AppAttack x OnTrack Vulnerability review
+
+## Team Member Name
+
+| Name                    | Student ID |
+| ----------------------- | ---------- |
+| Atharv Sandip Bhandare  | 223650012  |
+
+---
+
+## Vulnerability Details
+
+### Vulnerability Name
+
+Clickjacking Vulnerability
+
+### Vulnerability purpose
+
+Clickjacking works by embedding the legitimate OnTrack UI inside an invisible or disguised iframe on a malicious site. The attacker tricks users into interacting with this framed site, causing unintentional actions (e.g., clicking a login or delete button).
+
+This exploit is made possible by the absence of key HTTP response headers:
+- X-Frame-Options
+- Content-Security-Policy (frame-ancestors)
+Without these, the browser allows the page to be embedded elsewhere.
+
+### Affected Assets and Interaction Points
+
+This vulnerability posed a severe threat to OnTrack's application security if successfully exploited. Below are the components which were vulnerable:
+- `http://10.0.2.15:3000/` – Doubtfire API
+- `http://10.0.2.15:4200/` - OnTrack Frontend
+- `http://10.0.2.15:4200/assets`
+- `http://10.0.2.15:4200/assets/icons`
+
+## Vulnerability outcomes 
+
+### Outcomes
+
+Expected Outcomes if Vulnerability Was Exploited:
+- Users could be tricked into performing unintended actions like submitting forms or clicking buttons on the legitimate app embedded in a malicious iframe.
+- Sensitive actions such as login, logout, or grade modification could be triggered unknowingly.
+
+### Interactions:
+
+Routing Flowchart: ![process](Resources/process.png)
+
+1. #### User's Browser
+    - User initiates a secure (HTTPS) request to the application by visiting OnTrack.
+
+2. #### proxy-nginx.conf (Outer Gateway Layer)
+    - This is the first NGINX configuration layer that receives the user's request. It acts as a reverse proxy, meaning it handles incoming requests and decides where to route them next (frontend or backend).
+
+    #### Security Headers Applied Here
+    The proxy-nginx.conf file is responsible for enforcing important HTTP security headers to protect against clickjacking and other attacks.
+    These include:
+    - `X-Frame-Options: DENY` -> Prevents the site from being embedded inside an `<iframe>`
+    - `Content-Security-Policy: frame-ancestors 'none'` -> Ensures the page can only be displayed in the top-level window, blocking embedding on any other domain.
+
+3.  #### doubtfire-web/nginx.conf (Frontend Server)
+    - Once the request passes the outer proxy layer, it is routed to the internal frontend server defined in this file.
+    This layer serves static files like HTML, TypeScript, and CSS for the Angular application.
+
+    #### Frontend Server (localhost:4200): 
+    The Angular-based frontend runs on this port. It is responsible for rendering the user interface and making client-side requests (e.g., API calls).
+
+4. Interacts With Backend API (localhost:3000)
+    - The frontend communicates with the backend Rails API hosted at port 3000 to fetch and update dynamic data.
+
+## My Approach to Resolving the Vulnerability
+
+Below is my approach in resolving the vulnerability:
+
+1. Understanding the Hard Hat Vulnerability Report
+    - The fix begin by reviewing the vulnerability report generated by Hard Hat leads, which highlighted a Clickjacking vulnerability.
+    - The report specifically pointed out that the OnTrack application could be embedded within an `<iframe>` from a malicious site, allowing attackers to trick users into performing unintended actions.
+
+2. Identifying Affected Assets
+    - The report helped narrow down the affected assets, which were primarily route-based.
+    - These routes were accessible without proper restrictions on embedding or framing, leaving them open to potential Clickjacking attacks.
+    - The issue was not in the application code itself, but rather in how requests were being handled and routed by NGINX, especially around headers.
+
+3. Mapping OnTrack's Routing Architecture
+    - To understand where to implement the fix, I referred to the DEPLOYING.md and project structure. Here's what I found:
+        - There are two NGINX configuration files:
+            - `production/proxy-nginx.conf` -> acts as the reverse proxy and entry point.
+            - `doubtfire-web/nginx.conf` -> serves static frontend content
+        - All incoming user requests hit `proxy-nginx.conf` first. It then routes requests to: 
+            - `webserver:4200` -> for frontend (Angular)
+            - `apiserver:3000` -> for backend (Rails API)
+
+4. Discovery: Why Existing Headers Weren’t Working
+Although security headers like `Content-Security-Policy` were already defined inside `doubtfire-web/nginx.conf` , they were not showing up in the browser. Upon investigation:
+    - NGINX sends only one set of response headers.
+    - Since `proxy-nginx.conf` is the first point of contact, it overrides any headers set downstream.
+    - Therefore, the security headers had to be defined in `proxy-nginx.conf`, not in `doubtfire-web/nginx.conf`.
+
+5. Root Cause:
+Here’s what was conflicting:
+`doubtfire-web/nginx.conf` defined a `Content-Security-Policy` like this:
+    - `Content-Security-Policy: default-src https: 'unsafe-inline' 'unsafe-eval' blob: data: ws:;`
+    - This allowed unsafe-inline, which is insecure and directly conflicts with a stricter policy like:
+    - `Content-Security-Policy: frame-ancestors 'none';`
+    - Browsers do not allow `'unsafe-inline'` to coexist with `frame-ancestors`.
+    - Allowing `'unsafe-inline'` means scripts can be executed directly within HTML files. This is dangerous because it opens up the surface for XSS (Cross-Site Scripting) attacks.
+
+6. My Plan to fix implementation:
+-  In proxy-nginx.conf (production layer):
+    - production/proxy-nginx.conf: ![proxy-nginx.conf](Resources/proxy-nginx.png)
+    
+- This ensures:
+    - Clickjacking Protection via `X-Frame-Options: DENY`
+    - CSP Enforcement that disallows the app from being embedded anywhere
+- In `doubtfire-web/nginx.conf` (frontend layer):
+    - doubtfire-web/nginx.conf: ![nginx.conf](Resources/nginx.conf.png)
+- I commented out the Content-Security-Policy and Feature-Policy to avoid conflict.
+- Retained `Permissions-Policy` since it doesn’t interfere with framing or scripts.
+
+## Vulnerability Validation
+
+- [ ] Verified via Browser Developer Tools
+    - Compose your application first, then once the app has started; go to developer's console -> Network -> Selected any request -> Look under Response Headrs:
+        - `X-Frame-Options: DENY`
+        - `Content-Security-Policy: default-src 'self'; frame-ancestors 'none';`
+
+        - Temporary Check: ![override](Resources/override.png)
+- [ ] Yet to test Clickjacking Prevention in a Malicious Iframe Setup as listed in the report.
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