CVE-2024-31880
📋 TL;DR
IBM Db2 databases on Linux, UNIX, and Windows can crash when authenticated users execute specially crafted SQL statements, causing denial of service. This affects Db2 versions 10.5, 11.1, and 11.5 under specific configurations.
💻 Affected Systems
- IBM Db2 for Linux, UNIX and Windows
- IBM Db2 Connect Server
📦 What is this software?
Db2 by Ibm
Db2 by Ibm
Db2 by Ibm
⚠️ Risk & Real-World Impact
Worst Case
Complete database unavailability affecting all applications and users relying on the Db2 instance, requiring restart and potentially causing data corruption or service disruption.
Likely Case
Temporary service interruption affecting specific database connections or applications until the Db2 service is restarted.
If Mitigated
Minimal impact with proper access controls limiting authenticated users and monitoring preventing malicious SQL execution.
🎯 Exploit Status
Requires authenticated database access and knowledge of specific SQL statement construction; no public exploit code available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Apply fixes per IBM advisory: 10.5 FP11, 11.1.4 FP7, 11.5.9 FP2 or later
Vendor Advisory: https://www.ibm.com/support/pages/node/7156851
Restart Required: Yes
Instructions:
1. Review IBM advisory for specific fix versions. 2. Apply appropriate fix pack for your Db2 version. 3. Restart Db2 instance to apply changes.
🔧 Temporary Workarounds
Restrict SQL Execution
allLimit authenticated users' ability to execute arbitrary SQL statements through application controls or database permissions.
-- Review and tighten database user privileges
-- Implement application-level SQL validation
🧯 If You Can't Patch
- Implement strict access controls to limit authenticated database users to only necessary privileges.
- Monitor database logs for unusual SQL statement patterns and implement alerting for potential exploitation attempts.
🔍 How to Verify
Check if Vulnerable:
Check Db2 version and compare against affected versions in IBM advisory; review configuration against specific vulnerable conditions.Check Version:
db2level (on Db2 server)Verify Fix Applied:
Verify Db2 version after patch installation matches or exceeds fixed versions listed in IBM advisory.📡 Detection & Monitoring
Log Indicators:
- Db2 crash logs
- Unexpected service restarts
- Error logs containing SQL statement failures
Network Indicators:
- Sudden drop in database connections
- Application errors indicating database unavailability
SIEM Query:
source="db2" AND (event="crash" OR event="restart")