CVE-2024-57639

What it actually does

Crafted SQL statements trigger a crash or resource exhaustion in the dc_elt_size component, resulting in denial of service.

Why it matters to the business

Service outages and unplanned downtime for database-dependent applications until the vulnerable systems are restarted or patched.

How an attack unfolds

An attacker crafts a malicious SQL statement that exercises the dc_elt_size logic, causing the server process to terminate or hang and denying service to legitimate users.

How to fix it

Upgrade all listed kernel-rt packages to the fixed version 0:2.6.24.7-132.el5rt or later; apply vendor patches for virtuoso-opensource if a separate update is published.

How to confirm the fix worked

Verify package versions match the fixed releases, re-test with the original proof-of-concept SQL statements to confirm the denial-of-service condition no longer occurs, and monitor process stability under load.

Typical attack path

1. Identify a reachable instance of the vulnerable database server
2. Submit a specially crafted SQL statement via an authorized or unauthenticated channel
3. Trigger the dc_elt_size flaw leading to process crash or resource exhaustion
4. Repeat to maintain the denial-of-service condition

How to detect it

Search database query logs and application logs for unusually long or malformed SQL statements around the time of service restarts or crashes; correlate with process termination events.

What your security team should do

• Prioritize patching of internet-facing or high-value database instances within the next maintenance window
• Implement network segmentation or query allow-listing to reduce exposure until patches are applied
• Review logging configuration to capture SQL statement text for future incident response