CVE-2024-43181
📋 TL;DR
IBM Concert versions 1.0.0 through 2.1.0 fail to properly invalidate user sessions after logout, allowing authenticated users to reuse old session tokens to impersonate other users. This affects all deployments of IBM Concert within the vulnerable version range where users have authenticated access.
💻 Affected Systems
- IBM Concert
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
An authenticated malicious user could maintain access to another user's account after logout, potentially accessing sensitive data, performing unauthorized actions, or escalating privileges within the application.
Likely Case
Session hijacking where an attacker who previously had legitimate access maintains unauthorized access to accounts, leading to data exposure and unauthorized transactions.
If Mitigated
Limited impact with proper session management controls, network segmentation, and monitoring in place to detect anomalous session activity.
🎯 Exploit Status
Exploitation requires authenticated access but is technically simple once an attacker obtains valid session tokens.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: IBM Concert 2.1.1 or later
Vendor Advisory: https://www.ibm.com/support/pages/node/7257006
Restart Required: Yes
Instructions:
1. Download IBM Concert version 2.1.1 or later from IBM support. 2. Backup current installation and data. 3. Apply the update following IBM's upgrade documentation. 4. Restart the IBM Concert service. 5. Verify the update was successful.
🔧 Temporary Workarounds
Session Timeout Reduction
allReduce session timeout values to minimize window for session reuse attacks
Configure session timeout in IBM Concert configuration to minimum practical value (e.g., 15-30 minutes)
Force Logout All Users
allInvalidate all existing sessions and require re-authentication
Restart IBM Concert service to clear all active sessions
🧯 If You Can't Patch
- Implement network segmentation to restrict access to IBM Concert to only trusted users
- Enable detailed session logging and monitor for anomalous session activity patterns
🔍 How to Verify
Check if Vulnerable:
Check IBM Concert version via admin interface or configuration files. If version is between 1.0.0 and 2.1.0 inclusive, system is vulnerable.Check Version:
Check IBM Concert web interface admin panel or consult installation documentation for version informationVerify Fix Applied:
After patching, test that sessions are properly invalidated upon logout by logging in, logging out, then attempting to reuse the session token.📡 Detection & Monitoring
Log Indicators:
- Multiple successful logins from same session ID after logout events
- Session tokens being reused across different user accounts
- Unusual session duration patterns
Network Indicators:
- Repeated API calls with same session token after logout events
- Session tokens appearing in multiple user contexts
SIEM Query:
source="ibm_concert" AND (event="logout" OR event="session_end") | stats count by session_id | where count > 1