CVE-2024-57626
📋 TL;DR
This vulnerability in MonetDB Server's mat_join2 component allows attackers to execute crafted SQL statements that cause a Denial of Service (DoS) by crashing or hanging the database server. It affects organizations running vulnerable versions of MonetDB Server, particularly those exposing database interfaces to untrusted users. The vulnerability stems from SQL injection (CWE-89) in the mat_join2 component.
💻 Affected Systems
- MonetDB Server
📦 What is this software?
Monetdb by Monetdb
⚠️ Risk & Real-World Impact
Worst Case
Complete database service disruption requiring manual restart, potential data corruption if transactions are interrupted, and extended downtime affecting dependent applications.
Likely Case
Database service becomes unresponsive, requiring administrator intervention to restart the MonetDB service, causing temporary application outages.
If Mitigated
Minimal impact with proper network segmentation and access controls limiting SQL execution to trusted users only.
🎯 Exploit Status
Exploitation requires crafting specific SQL statements targeting the mat_join2 component. No public exploit code is available, but the CWE-89 classification suggests SQL injection techniques.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check MonetDB releases after v11.49.1 for fixes; refer to GitHub issue #7442 for specific patch version.
Vendor Advisory: https://github.com/MonetDB/MonetDB/issues/7442
Restart Required: No
Instructions:
1. Check the MonetDB GitHub issue #7442 for patch details. 2. Upgrade MonetDB Server to the patched version. 3. Test the upgrade in a non-production environment first. 4. Apply the upgrade to production systems during maintenance windows.
🔧 Temporary Workarounds
Restrict SQL Execution
allLimit database user permissions to prevent execution of complex SQL queries that might trigger the mat_join2 vulnerability.
Use MonetDB's GRANT/REVOKE statements to restrict privileges, e.g., REVOKE EXECUTE ON mat_join2 FROM public;
🧯 If You Can't Patch
- Implement network segmentation to isolate MonetDB servers from untrusted networks and users.
- Deploy a web application firewall (WAF) or database firewall to block suspicious SQL patterns targeting mat_join2.
🔍 How to Verify
Check if Vulnerable:
Check if MonetDB Server version is v11.49.1 or other affected versions by querying the database or system logs.Check Version:
SELECT value FROM sys.env() WHERE name = 'monet_version'; or check server startup logs.Verify Fix Applied:
After patching, verify the version is updated and test with safe SQL queries to ensure the mat_join2 component functions without crashes.📡 Detection & Monitoring
Log Indicators:
- Database crash logs, error messages related to mat_join2, or abnormal termination of MonetDB processes.
Network Indicators:
- Unusual SQL query patterns targeting mat_join2, spikes in database error responses.
SIEM Query:
Example: 'monetdb' AND ('crash' OR 'mat_join2' OR 'denial of service') in application logs.