T09 · Insecure Skill Coding Practices
Warning
- Location
scripts/webhook-server.js:35- Finding
Public Webhook Accepts Unauthenticated and Unbounded Requests by Default
- Content
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{ body += chunk; }); req.on('end', async () => { try { // Verify signature if secret is configured const secret = loadSecret(SECRET_PATH); const signature = req.headers['x-hub-signature']; if (secret && !verifySignature(body, signature, secret)) { console.error('Invalid webhook signature'); res.writeHead(401); res.end('Invalid signature'); return; } const parsed = JSON.parse(body); console.log(`Webhook received: ${parsed.eventType} for ${parsed.meetingId}`); const result = await processWebhook(parsed); ``` The related setup documentation explicitly makes the secret optional while recommending public exposure: ```md Runs on port 3142. Expose via Cloudflare Tunnel or ngrok, then paste the URL into Fireflies Settings → Developer Settings → Webhook URL. Optional webhook secret: ```bash echo "YOUR_SECRET" > ~/.openclaw/secrets/fireflies-webhook-secret.txt ``` ``` ### Technical Analysis Webhook authentication is enforced only when the local secret file exists. If the file is absent, the condition guarding `verifySignature` is false and every request reaching `/` or `/webhook` is accepted. This insecure default conflicts with ...[truncated 2606 chars]- Remediation
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{ size += chunk.length; if (size > MAX_BODY_BYTES) { res.writeHead(413); res.end('Payload too large'); req.destroy(); return; } chunks.push(chunk); }); ``` 6. Validate the parsed payload against a strict schema, including allowed event types and the expected `meetingId` format. 7. Add rate limiting, request timeouts, and replay protection where Fireflies provides a delivery identifier or timestamp. 8. Bind explicitly to `127.0.0.1` by default and require an explicit configuration change for non-loopback exposure. 9. Update `SKILL.md` so webhook authentication is mandatory rather than optional. ]]>