Security suggestions and a few Fixes ;)

[Designerpro13]

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[Designerpro13]

Security Hardening: Medium & Low Severity Fixes

Summary

Fixed 10 security vulnerabilities (6 Medium, 4 Low severity) identified in security audit. All fixes include inline CWE references and comprehensive audit logging.

Changes Made

Medium Severity Fixes (6)

1. Content Security Policy (CWE-1021)

• Added CSP headers to prevent XSS attacks
• File: internal/server/server.go

2. Security Headers (CWE-693)

• Implemented X-Frame-Options, X-Content-Type-Options, X-XSS-Protection, Referrer-Policy
• File: internal/server/server.go

3. Predictable File Naming (CWE-330)

• Replaced timestamp-based naming with crypto/rand generated prefixes
• File: internal/server/server.go

4. Audit Logging (CWE-778)

• Added [AUDIT] logs for all file operations (upload/download/delete)
• File: internal/server/server.go

5. WebSocket Connection Leak (CWE-404)

• Enhanced cleanup logging in defer blocks
• File: internal/server/server.go

6. File Deletion Capability (CWE-459)

• Added DELETE /delete/{filename} endpoint
• File: internal/server/server.go

Low Severity Fixes (4)

7. Verbose Error Messages (CWE-209)

• Generic errors to users, detailed logs server-side
• File: internal/server/server.go

8. Graceful Shutdown (CWE-404)

• Added sync.WaitGroup to track active uploads with 30s timeout
• Files: internal/server/server.go

9. Browser Auto-Open

• Added -open-browser command-line flag
• Files: main.go, internal/server/server.go

10. Version Check (CWE-1104)

• Non-blocking GitHub API check for updates on startup
• File: main.go

New Features

• File Deletion API: DELETE /delete/{filename}
• Audit Logging: All operations logged with IP tracking
• Graceful Shutdown: Waits for uploads before exit
• Update Notifications: Automatic version checking
• Browser Auto-Open: Optional via -open-browser flag