CVE-2023-50953
📋 TL;DR
IBM InfoSphere Information Server 11.7 discloses sensitive technical error information to remote attackers. This information leakage could reveal system details useful for crafting further attacks. Organizations running affected versions are vulnerable.
💻 Affected Systems
- IBM InfoSphere Information Server
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers obtain detailed system architecture, configuration, or debugging information that enables targeted follow-up attacks like authentication bypass or remote code execution.
Likely Case
Attackers gather technical details about the server environment, software versions, or internal paths that could facilitate reconnaissance for other vulnerabilities.
If Mitigated
Only generic error messages are displayed, preventing information disclosure even if the underlying error occurs.
🎯 Exploit Status
Exploitation requires triggering an error condition that returns detailed technical messages. No authentication is needed to receive these messages if the error occurs.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Apply fix from IBM Security Bulletin
Vendor Advisory: https://www.ibm.com/support/pages/node/7159057
Restart Required: Yes
Instructions:
1. Download the fix from IBM Fix Central. 2. Apply the fix according to IBM documentation. 3. Restart the InfoSphere Information Server services. 4. Verify the fix by testing error conditions.
🔧 Temporary Workarounds
Configure Generic Error Messages
allConfigure the application to return generic error messages instead of detailed technical information
Configure in InfoSphere administration console: Set error reporting to 'Generic messages only'
Network Segmentation
allRestrict access to InfoSphere servers to authorized users only
firewall rules to limit access to specific IP ranges
🧯 If You Can't Patch
- Implement network access controls to restrict who can reach the InfoSphere servers
- Configure web application firewalls to filter error messages containing technical details
🔍 How to Verify
Check if Vulnerable:
Trigger an error condition (e.g., malformed request) and check if detailed technical information is returned in the responseCheck Version:
Check InfoSphere version through administration console or product documentation methodsVerify Fix Applied:
After patching, trigger the same error condition and verify only generic error messages are returned📡 Detection & Monitoring
Log Indicators:
- Unusual error frequency
- Requests designed to trigger errors
- Access from unexpected sources
Network Indicators:
- Multiple error responses to single client
- Patterns of malformed requests
SIEM Query:
source="infosphere" AND (message="*error*" OR message="*exception*") AND NOT message="*generic error*"