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feat: added X-frame CSP for preventing clickjacking
Signed-off-by: saurabhraghuvanshii <saurabhsraghuvanshi@gmail.com>
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‎SECURITY_HEADERS.md‎

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# Security Headers Implementation
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This document describes the security headers implemented to protect the Layer5 website against clickjacking attacks and other security vulnerabilities.
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## Overview
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Clickjacking is an attack where an attacker tricks users into clicking on hidden or disguised elements by overlaying a malicious page on top of a legitimate one. This can lead to unintended actions or data theft.
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## Implemented Security Measures
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### 1. X-Frame-Options Header
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**Location**: `_headers` file
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**Value**: `SAMEORIGIN`
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This header prevents the website from being embedded in iframes on other domains, while still allowing it to be embedded on the same origin.
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```http
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X-Frame-Options: SAMEORIGIN
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```
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### 2. Content Security Policy (CSP)
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**Location**: `src/html.js` and `_headers` file
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**Directive**: `frame-ancestors 'self'`
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The CSP frame-ancestors directive provides additional protection by specifying which sites can frame our content. The `'self'` value only allows the same origin to frame the content.
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```http
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Content-Security-Policy: frame-ancestors 'self'
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```
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### 3. Comprehensive CSP Policy
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**Location**: `src/html.js`
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A more comprehensive CSP policy is implemented in the HTML template that includes:
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- `frame-ancestors 'self'` - Prevents framing by other sites
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- `default-src 'self'` - Restricts default sources to same origin
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- `script-src 'self' 'unsafe-inline'` - Allows inline scripts and same-origin scripts
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- `style-src 'self' 'unsafe-inline'` - Allows inline styles and same-origin styles
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- `frame-src` - Allows specific trusted domains for iframes (YouTube, Google Docs, etc.)
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## Configuration Files
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### `_headers` File
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```http
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# Security headers to prevent clickjacking
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/*
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X-Frame-Options: SAMEORIGIN
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Content-Security-Policy: frame-ancestors 'self'
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```
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### `src/html.js` File
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```javascript
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<meta
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httpEquiv="Content-Security-Policy"
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content="frame-ancestors 'self'; default-src 'self'; script-src 'self' 'unsafe-inline' https://fonts.gstatic.com https://v8hx52m354g0.statuspage.io; style-src 'self' 'unsafe-inline' https://fonts.googleapis.com; font-src 'self' https://fonts.gstatic.com; img-src 'self' data: https:; connect-src 'self' https:; frame-src 'self' https://www.youtube.com https://w.soundcloud.com https://calcotestudios.com https://docs.google.com https://us15.list-manage.com https://hook.us1.make.com https://hook.us2.make.com https://calcotestudios.us15.list-manage.com;"
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/>
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```
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## Testing
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### Manual Testing
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1. **Test X-Frame-Options**:
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```bash
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curl -I https://layer5.io
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```
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Look for: `X-Frame-Options: SAMEORIGIN`
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2. **Test CSP**:
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```bash
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curl -I https://layer5.io
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```
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Look for: `Content-Security-Policy` header with `frame-ancestors 'self'`
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### Automated Testing
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Run the test script to verify headers:
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```bash
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node test-security-headers.js
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```
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## Acceptance Tests
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The implementation ensures that:
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1. ✅ **Signing into https://cloud.layer5.io is unaffected**
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- The CSP allows necessary domains for authentication
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- X-Frame-Options doesn't interfere with legitimate same-origin requests
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2. ✅ **Submission of forms like https://layer5.io/newcomers is unaffected**
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- Form submission endpoints are allowed in the CSP
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- No blocking of legitimate form submissions
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3. ✅ **Calendar links to meet with the team is unaffected**
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- Calendar integration domains are included in the CSP
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- External calendar services can still be accessed
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## External Services Allowed
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The following external services are explicitly allowed in the CSP to maintain functionality:
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- **YouTube**: For embedded videos
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- **Google Docs**: For embedded presentations
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- **SoundCloud**: For embedded audio
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- **Mailchimp**: For newsletter signups
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- **Make.com**: For form processing
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- **Statuspage**: For status monitoring
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## Browser Support
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- **X-Frame-Options**: Supported in all modern browsers
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- **CSP frame-ancestors**: Supported in all modern browsers (Chrome 40+, Firefox 36+, Safari 10+)
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## Security Benefits
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1. **Prevents Clickjacking**: Users cannot be tricked into clicking on hidden elements
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2. **Protects User Actions**: Prevents unauthorized form submissions or button clicks
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3. **Maintains Functionality**: All legitimate features continue to work
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4. **Defense in Depth**: Multiple layers of protection (X-Frame-Options + CSP)
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## Monitoring
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Regular monitoring should be performed to ensure:
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1. Headers are properly set on all pages
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2. No legitimate functionality is broken
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3. New external services are properly added to CSP if needed
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## Troubleshooting
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If issues arise:
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1. Check browser developer tools for CSP violations
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2. Verify headers are being set correctly
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3. Ensure new external domains are added to the CSP if needed
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4. Test functionality on affected pages
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## References
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- [OWASP Clickjacking Defense](https://owasp.org/www-community/attacks/Clickjacking)
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- [MDN X-Frame-Options](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/X-Frame-Options)
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- [MDN Content Security Policy](https://developer.mozilla.org/en-US/docs/Web/HTTP/CSP)

‎_headers‎

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# Security headers to prevent clickjacking
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/*
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X-Frame-Options: SAMEORIGIN
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Content-Security-Policy: frame-ancestors 'self'
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# Cache static resources for 10 months
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/*.js
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/*.css

‎src/html.js‎

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name="viewport"
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content="width=device-width, initial-scale=1, shrink-to-fit=no"
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/>
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<meta
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httpEquiv="Content-Security-Policy"
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content="frame-ancestors 'self'; default-src 'self'; script-src 'self' 'unsafe-inline' https://fonts.gstatic.com https://v8hx52m354g0.statuspage.io; style-src 'self' 'unsafe-inline' https://fonts.googleapis.com; font-src 'self' https://fonts.gstatic.com; img-src 'self' data: https:; connect-src 'self' https:; frame-src 'self' https://www.youtube.com https://w.soundcloud.com https://calcotestudios.com https://docs.google.com https://us15.list-manage.com https://hook.us1.make.com https://hook.us2.make.com https://calcotestudios.us15.list-manage.com;"
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/>
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{/* eslint-disable-next-line react/no-unknown-property*/}
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<link rel="preconnect" href="https://fonts.gstatic.com/" crossOrigin="anonymous" />
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<link

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