CVE-2024-28762
📋 TL;DR
IBM Db2 databases running versions 10.5, 11.1, and 11.5 on Linux, UNIX, and Windows are vulnerable to denial of service attacks. An attacker can crash the database server by sending a specially crafted query under certain conditions, disrupting database availability. This affects all Db2 installations including DB2 Connect Server.
💻 Affected Systems
- IBM Db2 for Linux, UNIX and Windows
- DB2 Connect Server
📦 What is this software?
Db2 by Ibm
Db2 by Ibm
Db2 by Ibm
Db2 by Ibm
Db2 by Ibm
Db2 by Ibm
Db2 by Ibm
Db2 by Ibm
Db2 by Ibm
⚠️ Risk & Real-World Impact
Worst Case
Complete database service outage requiring restart, potentially causing extended downtime for dependent applications and services.
Likely Case
Temporary service disruption affecting database availability until manual restart, impacting application functionality.
If Mitigated
Minimal impact with proper query validation and monitoring in place to detect and block malicious queries before execution.
🎯 Exploit Status
Exploitation requires database access and knowledge of specific query conditions. No public exploit code has been identified.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Apply fixes as specified in IBM advisory APARs: IT43926 for 11.5, IT43927 for 11.1, IT43928 for 10.5
Vendor Advisory: https://www.ibm.com/support/pages/node/7156847
Restart Required: Yes
Instructions:
1. Review IBM advisory for specific fix details. 2. Apply the appropriate fix pack or interim fix for your Db2 version. 3. Restart the Db2 instance to apply changes. 4. Verify the fix is applied correctly.
🔧 Temporary Workarounds
Implement Query Filtering
allDeploy database firewall or application-layer filtering to block suspicious queries matching known patterns.
Restrict Database Access
allLimit database connections to trusted applications and users only, reducing attack surface.
🧯 If You Can't Patch
- Implement strict network segmentation to isolate Db2 servers from untrusted networks
- Deploy monitoring and alerting for abnormal query patterns and database crashes
🔍 How to Verify
Check if Vulnerable:
Check Db2 version using 'db2level' command and compare against affected versions (10.5, 11.1, 11.5).Check Version:
db2level | grep "Product installed"Verify Fix Applied:
Verify fix application by checking for specific APARs: IT43926 (11.5), IT43927 (11.1), IT43928 (10.5) in Db2 fix history.📡 Detection & Monitoring
Log Indicators:
- Unexpected database crashes or restarts
- Abnormal query patterns with specific syntax
- Db2 diagnostic logs showing service interruptions
Network Indicators:
- Unusual database connection patterns
- Multiple failed query attempts from single source
SIEM Query:
source="db2*" AND (event_type="crash" OR event_type="restart" OR message="*denial*" OR message="*service*interruption*")