CVE-2024-57655
📋 TL;DR
This vulnerability in OpenLink Virtuoso OpenSource allows attackers to cause denial of service by sending specially crafted SQL statements to the dfe_n_in_order component. Systems running vulnerable versions of Virtuoso OpenSource are affected, particularly those exposed to untrusted SQL input.
💻 Affected Systems
- OpenLink Virtuoso OpenSource
📦 What is this software?
Virtuoso by Openlinksw
⚠️ Risk & Real-World Impact
Worst Case
Complete service unavailability requiring restart of the Virtuoso database service, potentially disrupting all applications dependent on it.
Likely Case
Service degradation or temporary unavailability affecting database operations until the service is restarted.
If Mitigated
Minimal impact with proper input validation, query filtering, and network segmentation in place.
🎯 Exploit Status
Requires ability to execute SQL statements against the Virtuoso instance. No authentication bypass mentioned, but any user/application with SQL execution privileges could trigger it.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check GitHub issue #1216 for fix version
Vendor Advisory: https://github.com/openlink/virtuoso-opensource/issues/1216
Restart Required: No
Instructions:
1. Monitor the GitHub issue for patch release. 2. Upgrade to patched version when available. 3. Test in non-production first. 4. Apply to production systems.
🔧 Temporary Workarounds
Input Validation and Filtering
allImplement strict input validation and filtering for SQL statements before they reach Virtuoso
Network Access Controls
allRestrict network access to Virtuoso endpoints to only trusted applications and users
🧯 If You Can't Patch
- Implement application-level SQL query validation and sanitization
- Deploy network segmentation and firewall rules to limit access to Virtuoso services
🔍 How to Verify
Check if Vulnerable:
Check Virtuoso version: SELECT sys_stat('st_dbms_version'); If version is v7.2.11, system is vulnerable.Check Version:
SELECT sys_stat('st_dbms_version');Verify Fix Applied:
After patching, verify version is no longer v7.2.11 and test with safe SQL queries to ensure service stability.📡 Detection & Monitoring
Log Indicators:
- Unusual SQL query patterns
- Service crash/restart logs
- Error messages related to dfe_n_in_order
Network Indicators:
- High volume of SQL requests from single sources
- Unusual SQL syntax in network captures
SIEM Query:
source="virtuoso.log" AND ("crash" OR "restart" OR "dfe_n_in_order" OR "denial of service")