CVE-2025-6709
📋 TL;DR
MongoDB Server is vulnerable to denial of service when processing specific date values in JSON input during OIDC authentication. An attacker can crash the server by sending a malicious payload, affecting MongoDB v6.0, v7.0, and v8.0 versions. In v6.0, authentication is required for exploitation, while v7.0 and v8.0 allow unauthenticated attacks.
💻 Affected Systems
- MongoDB Server
📦 What is this software?
Mongodb by Mongodb
Mongodb by Mongodb
Mongodb by Mongodb
⚠️ Risk & Real-World Impact
Worst Case
Complete server crash leading to sustained service unavailability and potential data loss if replication is not properly configured.
Likely Case
Temporary service disruption requiring manual server restart, impacting application availability.
If Mitigated
Minimal impact with proper network segmentation, authentication requirements, and monitoring to detect and respond to attacks.
🎯 Exploit Status
Exploitation requires sending specific malformed JSON via mongo shell or similar client. No public exploit code available yet.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: v6.0.21, v7.0.17, v8.0.5
Vendor Advisory: https://jira.mongodb.org/browse/SERVER-106748
Restart Required: Yes
Instructions:
1. Download patched version from MongoDB website. 2. Stop MongoDB service. 3. Backup data and configuration. 4. Install updated version. 5. Restart MongoDB service. 6. Verify version and functionality.
🔧 Temporary Workarounds
Disable OIDC Authentication
allTemporarily disable OIDC authentication if not required, reducing attack surface.
Modify MongoDB configuration to remove OIDC settings and restart service
Network Access Control
allRestrict MongoDB port access to trusted IP addresses only.
Configure firewall rules to limit access to MongoDB port (default 27017)
🧯 If You Can't Patch
- Implement strict network segmentation to isolate MongoDB from untrusted networks
- Enable comprehensive logging and monitoring for OIDC authentication attempts and server crashes
🔍 How to Verify
Check if Vulnerable:
Check MongoDB version and compare against affected versions. Verify if OIDC authentication is enabled in configuration.Check Version:
db.version() in mongo shell or mongod --versionVerify Fix Applied:
Confirm MongoDB version is 6.0.21, 7.0.17, or 8.0.5 or higher. Test OIDC authentication functionality.📡 Detection & Monitoring
Log Indicators:
- Server crash logs with invariant failure messages
- Unusual OIDC authentication attempts with malformed JSON
- MongoDB service restart events
Network Indicators:
- Multiple connection attempts to MongoDB OIDC endpoints with JSON payloads
- Traffic patterns matching mongo shell commands
SIEM Query:
source="mongodb.log" AND ("invariant failure" OR "server crash" OR "OIDC authentication error")