Created comprehensive security layer to protect against malicious input
and resource exhaustion attacks.
New security.js module:
- sanitizeLocationName(): Blocks __proto__, constructor, toString, etc.
- sanitizeItemName(): Enforces max length (500 chars)
- validateStoredInventory(): Validates entire stored object structure
- MAX_ITEMS_PER_SECTION: Limit of 500 items per section
Protected attack vectors:
1. Prototype pollution via location names
- Blocked: "__proto__", "constructor", "prototype", etc.
- Alert shown to user if attempted
2. DoS via extremely long names
- Location names: max 200 chars (truncated with warning)
- Item names: max 500 chars (truncated with warning)
3. DoS via massive item lists
- Max 500 items per section (truncated with warning)
Integration:
- itemParser.js: Uses sanitizeItemName() and enforces max items
- inventoryActions.js: Validates all user input before saving
- Manual location creation: blocked dangerous names
- Manual item addition: length limits enforced
Security best practices (2025):
- No regex DoS vulnerabilities (character-by-character parsing)
- Explicit hasOwnProperty checks to avoid inherited properties
- Console warnings for all security events (auditing)
- Graceful degradation (truncate, don't crash)
- Defense in depth (validation at multiple layers)
This protects against both malicious actors and accidental abuse.
Lucas 'Paperboy' Rose-Winters