CVE-2024-8654
📋 TL;DR
MongoDB Server v6.0.3 contains a memory access vulnerability in internal aggregation stage processing when zero arguments are called. This could lead to crashes, data corruption, or potential information disclosure. Only MongoDB Server v6.0.3 installations are affected.
💻 Affected Systems
- MongoDB Server
📦 What is this software?
Mongodb by Mongodb
⚠️ Risk & Real-World Impact
Worst Case
Server crash leading to denial of service, memory corruption potentially enabling arbitrary code execution, or sensitive data leakage from uninitialized memory.
Likely Case
Server instability, crashes, or unexpected behavior when processing specific aggregation queries with zero arguments.
If Mitigated
Minimal impact if proper network segmentation and access controls prevent unauthorized users from sending malicious aggregation queries.
🎯 Exploit Status
Exploitation requires sending specific aggregation queries with zero arguments to trigger the memory access issue.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Upgrade to MongoDB Server v6.0.4 or later
Vendor Advisory: https://jira.mongodb.org/browse/SERVER-71477
Restart Required: Yes
Instructions:
1. Backup all MongoDB data and configuration. 2. Stop MongoDB service. 3. Upgrade to MongoDB v6.0.4 or later using your package manager or MongoDB distribution. 4. Restart MongoDB service. 5. Verify successful upgrade and normal operation.
🔧 Temporary Workarounds
Restrict Aggregation Query Access
allLimit which users/applications can execute aggregation queries through MongoDB role-based access control.
db.createRole({ role: "restrictedRole", privileges: [{ resource: { db: "", collection: "" }, actions: ["find", "insert", "update", "remove"] }], roles: [] })
db.grantRolesToUser("username", ["restrictedRole"])
🧯 If You Can't Patch
- Implement strict network access controls to limit MongoDB exposure to only trusted applications
- Monitor for abnormal server behavior or crashes and implement aggressive logging of aggregation queries
🔍 How to Verify
Check if Vulnerable:
Connect to MongoDB and run: db.version(). If output is "6.0.3", the system is vulnerable.Check Version:
db.version()Verify Fix Applied:
After patching, run db.version() and confirm version is 6.0.4 or higher. Test aggregation functionality with your applications.📡 Detection & Monitoring
Log Indicators:
- Unexpected server crashes or restarts
- Error messages related to aggregation stages or memory access
- Abnormal query patterns with zero-argument aggregation calls
Network Indicators:
- Unusual aggregation query traffic patterns
- Requests to MongoDB aggregation endpoints from unexpected sources
SIEM Query:
source="mongodb.log" AND ("aggregation" OR "stage") AND ("error" OR "crash" OR "unexpected")