CVE-2023-48951
📋 TL;DR
A vulnerability in the box_equal function of OpenLink Virtuoso OpenSource v7.2.11 allows attackers to cause Denial of Service (DoS) by executing a SELECT statement. This affects systems running vulnerable versions of Virtuoso database software, potentially disrupting database availability.
💻 Affected Systems
- OpenLink Virtuoso OpenSource
📦 What is this software?
Virtuoso by Openlinksw
⚠️ Risk & Real-World Impact
Worst Case
Complete database unavailability, disrupting all dependent applications and services.
Likely Case
Database service crashes requiring restart, causing temporary application downtime.
If Mitigated
Minimal impact with proper monitoring and rapid restart capabilities.
🎯 Exploit Status
Exploitation requires ability to execute SQL queries against the database.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check GitHub issue #1177 for specific fix version.
Vendor Advisory: https://github.com/openlink/virtuoso-opensource/issues/1177
Restart Required: Yes
Instructions:
1. Check GitHub issue #1177 for patch details. 2. Update to patched version. 3. Restart Virtuoso service.
🔧 Temporary Workarounds
Restrict SQL Query Access
allLimit database user permissions to prevent execution of problematic SELECT statements.
-- Use Virtuoso SQL to review and restrict user privileges
🧯 If You Can't Patch
- Implement strict database access controls and monitoring.
- Deploy database load balancers to mitigate single-point failures.
🔍 How to Verify
Check if Vulnerable:
Check Virtuoso version; if running v7.2.11, assume vulnerable.Check Version:
SELECT sys_stat('st_dbms_version');Verify Fix Applied:
Verify updated version and test SELECT statement functionality.📡 Detection & Monitoring
Log Indicators:
- Database crash logs
- Unexpected service restarts
- Error messages related to box_equal function
Network Indicators:
- Sudden drop in database connections
- Increased failed query attempts
SIEM Query:
source="virtuoso.log" AND ("crash" OR "segfault" OR "box_equal")