CVE-2023-36370
📋 TL;DR
This vulnerability in MonetDB Server's gc_col component allows attackers to execute crafted SQL statements that cause a Denial of Service (DoS) by crashing or hanging the database server. It affects MonetDB Server versions 11.45.17 and 11.46.0, potentially impacting any organization using these versions in production environments.
💻 Affected Systems
- MonetDB Server
📦 What is this software?
Monetdb by Monetdb
Monetdb by Monetdb
⚠️ Risk & Real-World Impact
Worst Case
Complete database service disruption requiring manual restart, potentially causing extended downtime and data unavailability for applications.
Likely Case
Database service crashes or becomes unresponsive, requiring administrator intervention to restart the MonetDB service.
If Mitigated
Minimal impact with proper network segmentation and access controls limiting who can execute SQL against the database.
🎯 Exploit Status
Exploitation requires ability to execute SQL statements against the database, but the specific crafted SQL is not publicly documented.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Versions after 11.45.17 and 11.46.0 (check MonetDB releases for specific fixed versions)
Vendor Advisory: https://github.com/MonetDB/MonetDB/issues/7382
Restart Required: Yes
Instructions:
1. Check current MonetDB version. 2. Upgrade to a patched version from official MonetDB repositories. 3. Restart MonetDB service. 4. Verify the upgrade was successful.
🔧 Temporary Workarounds
Restrict SQL Execution
allLimit which users and applications can execute SQL against the database to reduce attack surface.
# Review and tighten database user permissions
# Use application-level controls to validate SQL inputs
Network Segmentation
linuxIsolate MonetDB servers from untrusted networks and limit access to trusted IPs only.
# Configure firewall rules to restrict access
# iptables -A INPUT -p tcp --dport 50000 -s trusted_ip -j ACCEPT
🧯 If You Can't Patch
- Implement strict network access controls to limit who can connect to MonetDB
- Monitor database logs for unusual SQL patterns and implement rate limiting on SQL execution
🔍 How to Verify
Check if Vulnerable:
Check MonetDB version: if it's exactly 11.45.17 or 11.46.0, it's vulnerable.Check Version:
mclient -d <database> -s 'SELECT monetdb_version();'Verify Fix Applied:
After upgrade, verify the version is no longer 11.45.17 or 11.46.0 and test database functionality.📡 Detection & Monitoring
Log Indicators:
- Database crash logs
- Unexpected service restarts
- Error messages related to gc_col or memory allocation
Network Indicators:
- Unusual SQL query patterns from unexpected sources
- Multiple connection attempts followed by service disruption
SIEM Query:
source="monetdb.log" AND ("crash" OR "segfault" OR "abort" OR "panic")