CVE-2023-36368
📋 TL;DR
A vulnerability in MonetDB Server's cs_bind_ubat component allows attackers to cause Denial of Service (DoS) by sending specially crafted SQL statements. This affects MonetDB Server versions 11.45.17 and 11.46.0, potentially disrupting database availability for applications relying on these versions.
💻 Affected Systems
- MonetDB Server
📦 What is this software?
Monetdb by Monetdb
Monetdb by Monetdb
⚠️ Risk & Real-World Impact
Worst Case
Complete database service disruption, making all data inaccessible and causing application downtime until service is restored.
Likely Case
Temporary service interruption requiring database restart, causing brief application unavailability.
If Mitigated
Minimal impact with proper network segmentation and monitoring allowing quick detection and response.
🎯 Exploit Status
Exploitation requires sending crafted SQL statements, which is straightforward for attackers with database access.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Versions after 11.45.17 and 11.46.0
Vendor Advisory: https://github.com/MonetDB/MonetDB/issues/7379
Restart Required: Yes
Instructions:
1. Upgrade MonetDB Server to a version beyond 11.45.17 or 11.46.0. 2. Stop the MonetDB service. 3. Install the updated version. 4. Restart the MonetDB service.
🔧 Temporary Workarounds
SQL Query Filtering
allImplement input validation to filter or block suspicious SQL patterns at application layer
Network Access Restriction
linuxRestrict database access to only trusted application servers using firewall rules
iptables -A INPUT -p tcp --dport 50000 -s trusted_ip -j ACCEPT
iptables -A INPUT -p tcp --dport 50000 -j DROP
🧯 If You Can't Patch
- Implement strict network segmentation to isolate MonetDB servers from untrusted networks
- Deploy rate limiting on database connections to mitigate DoS impact
🔍 How to Verify
Check if Vulnerable:
Check MonetDB version using 'mclient --version' or query 'SELECT * FROM sys.version();'Check Version:
mclient --versionVerify Fix Applied:
Confirm version is newer than 11.45.17 and 11.46.0, then test with normal SQL operations📡 Detection & Monitoring
Log Indicators:
- Multiple connection failures
- Database crash/restart events
- Unusual SQL query patterns
Network Indicators:
- High volume of SQL queries from single source
- Malformed SQL packets
SIEM Query:
source="monetdb.log" AND ("crash" OR "segfault" OR "abnormal termination")