CVE-2024-31894
📋 TL;DR
IBM App Connect Enterprise versions 12.0.1.0 through 12.0.12.1 contain an authentication flaw where expired access tokens can still be used to retrieve sensitive user information. This affects organizations running vulnerable versions of IBM App Connect Enterprise with authenticated user access. The vulnerability allows authenticated users to bypass intended token expiration controls.
💻 Affected Systems
- IBM App Connect Enterprise
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
An authenticated malicious insider or compromised account could persistently access sensitive user data even after their access should have been revoked, potentially leading to data exfiltration or privacy violations.
Likely Case
Authenticated users accidentally or intentionally using expired tokens to access user information they shouldn't have access to, potentially violating data privacy policies.
If Mitigated
With proper monitoring and access controls, the impact is limited to temporary unauthorized access that can be detected and remediated.
🎯 Exploit Status
Exploitation requires authenticated access but is technically simple once authenticated.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 12.0.12.2 and later
Vendor Advisory: https://www.ibm.com/support/pages/node/7154606
Restart Required: Yes
Instructions:
1. Download IBM App Connect Enterprise 12.0.12.2 or later from IBM Fix Central. 2. Backup current configuration and data. 3. Stop all App Connect Enterprise services. 4. Apply the update following IBM installation procedures. 5. Restart services and verify functionality.
🔧 Temporary Workarounds
Implement Token Validation Proxy
allDeploy a reverse proxy or API gateway that validates token expiration before forwarding requests to App Connect Enterprise.
Enhanced Monitoring and Alerting
allImplement monitoring for access attempts using expired tokens and alert security teams.
🧯 If You Can't Patch
- Implement strict access controls and least privilege principles to limit authenticated user access to sensitive data.
- Deploy network segmentation to isolate App Connect Enterprise from sensitive data sources where possible.
🔍 How to Verify
Check if Vulnerable:
Check the installed version of IBM App Connect Enterprise. If version is between 12.0.1.0 and 12.0.12.1 inclusive, the system is vulnerable.Check Version:
On the App Connect Enterprise server, check the version in the installation directory or via administrative console.Verify Fix Applied:
After patching, verify the version is 12.0.12.2 or later and test that expired access tokens no longer provide access to sensitive user information.📡 Detection & Monitoring
Log Indicators:
- Multiple access attempts with the same token over extended periods
- Access to user information endpoints with tokens that should be expired
Network Indicators:
- Unusual patterns of data access from authenticated users
- Requests to sensitive endpoints with old authentication tokens
SIEM Query:
source="app_connect_enterprise" AND (event_type="data_access" OR event_type="authentication") AND token_age > token_max_age