CVE-2025-36185
📋 TL;DR
This vulnerability in IBM Db2 allows a local user to cause a denial of service by exploiting improper neutralization of special elements in data query logic. It affects IBM Db2 12.1.0 through 12.1.2 on Linux, UNIX, and Windows systems, including Db2 Connect Server. The attack requires local access to the system.
💻 Affected Systems
- IBM Db2
- 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 dependent on the Db2 instance, potentially causing extended business disruption.
Likely Case
Temporary service degradation or database crashes affecting specific queries or connections, requiring database restart.
If Mitigated
Minimal impact with proper access controls limiting local user privileges and monitoring for abnormal query patterns.
🎯 Exploit Status
Exploitation requires local access and knowledge of specific query patterns that trigger the vulnerability. No public exploit code has been identified.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Apply fix pack or upgrade as specified in IBM advisory
Vendor Advisory: https://www.ibm.com/support/pages/node/7250487
Restart Required: Yes
Instructions:
1. Review IBM advisory for specific fix details. 2. Apply the recommended fix pack or upgrade to a non-vulnerable version. 3. Restart the Db2 instance to apply changes. 4. Verify the fix is applied successfully.
🔧 Temporary Workarounds
Restrict local user access
allLimit local user privileges to only essential personnel and implement least privilege principles for database access.
Implement query monitoring
allMonitor and log unusual query patterns that could indicate exploitation attempts.
🧯 If You Can't Patch
- Implement strict access controls to limit local user database privileges
- Deploy additional monitoring for database performance and crash events
🔍 How to Verify
Check if Vulnerable:
Check Db2 version using 'db2level' command and compare against affected versions 12.1.0 through 12.1.2Check Version:
db2levelVerify Fix Applied:
Verify version after patching shows a version above 12.1.2 or includes the fix pack mentioned in IBM advisory📡 Detection & Monitoring
Log Indicators:
- Database crash logs
- Abnormal query termination events
- Performance degradation alerts
Network Indicators:
- Increased database connection failures from applications
SIEM Query:
source="db2" AND (event_type="crash" OR event_type="abnormal_termination")