CVE-2023-31608
📋 TL;DR
This vulnerability in OpenLink Virtuoso Open-Source allows attackers to cause Denial of Service (DoS) by sending specially crafted SQL statements that trigger an issue in the artm_div_int component. Any system running the vulnerable version of Virtuoso with SQL query processing enabled is affected, potentially disrupting database availability.
💻 Affected Systems
- OpenLink Virtuoso Open-Source
📦 What is this software?
Virtuoso by Openlinksw
⚠️ Risk & Real-World Impact
Worst Case
Complete database service disruption making applications unavailable, potentially requiring service restart and causing extended downtime.
Likely Case
Database service crashes or becomes unresponsive, requiring manual intervention to restore functionality.
If Mitigated
Minimal impact with proper input validation and query filtering in place.
🎯 Exploit Status
CWE-89 indicates SQL injection vulnerability; exploitation requires crafting specific SQL statements but doesn't require authentication if SQL endpoints are exposed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check GitHub issue for latest patched version
Vendor Advisory: https://github.com/openlink/virtuoso-opensource/issues/1123
Restart Required: Yes
Instructions:
1. Check GitHub issue #1123 for patch details. 2. Update to latest Virtuoso version containing the fix. 3. Restart Virtuoso services. 4. Verify fix by testing with previously problematic queries.
🔧 Temporary Workarounds
Input Validation and Query Filtering
allImplement strict input validation and parameterized queries to prevent malicious SQL from reaching the vulnerable component.
Network Access Restrictions
linuxRestrict network access to Virtuoso SQL endpoints to trusted sources only.
iptables -A INPUT -p tcp --dport 1111 -s trusted_network -j ACCEPT
iptables -A INPUT -p tcp --dport 1111 -j DROP
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to block suspicious SQL patterns
- Monitor database logs for unusual query patterns and implement rate limiting
🔍 How to Verify
Check if Vulnerable:
Check Virtuoso version: vsql -V or check server logs for version information. If running v7.2.9, assume vulnerable.Check Version:
vsql -V 2>/dev/null || grep 'Virtuoso' /var/log/virtuoso/virtuoso.logVerify Fix Applied:
After patching, attempt to reproduce with test queries that previously caused issues; monitor for service stability.📡 Detection & Monitoring
Log Indicators:
- Database service crashes
- Unusual SQL query patterns with division operations
- Error messages containing 'artm_div_int'
Network Indicators:
- Multiple failed SQL queries from single source
- Unusual query patterns in database traffic
SIEM Query:
source="virtuoso.log" AND ("crash" OR "artm_div_int" OR "division by zero")