CVE-2024-40691
📋 TL;DR
This vulnerability in IBM Cognos Controller allows attackers to upload malicious executable files through the web interface due to insufficient file validation. Attackers could upload malware that could be executed on the system or distributed to victims. This affects IBM Cognos Controller versions 11.0.0 and 11.0.1.
💻 Affected Systems
- IBM Cognos Controller
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise, data theft, ransomware deployment, or lateral movement within the network.
Likely Case
Malware upload leading to system infection, data exfiltration, or use as a foothold for further attacks.
If Mitigated
Limited impact with proper file upload restrictions, web application firewalls, and network segmentation in place.
🎯 Exploit Status
Requires access to the web interface but no authentication needed. Attackers need to craft malicious files and upload them.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Apply fix from IBM Security Bulletin
Vendor Advisory: https://www.ibm.com/support/pages/node/7177220
Restart Required: No
Instructions:
1. Review IBM Security Bulletin. 2. Apply the recommended fix or upgrade to a patched version. 3. Test the application after patching.
🔧 Temporary Workarounds
Implement file upload restrictions
allConfigure web application firewall or server to block executable file uploads
Network segmentation
allRestrict access to Cognos Controller web interface to trusted networks only
🧯 If You Can't Patch
- Implement strict file upload validation at the application level
- Deploy web application firewall with file upload protection rules
🔍 How to Verify
Check if Vulnerable:
Check IBM Cognos Controller version. If running 11.0.0 or 11.0.1, the system is vulnerable.Check Version:
Check version through Cognos Controller administration interface or application logsVerify Fix Applied:
Verify that the fix from IBM Security Bulletin has been applied and test file upload functionality with malicious files.📡 Detection & Monitoring
Log Indicators:
- Unusual file uploads to Cognos Controller web interface
- Uploads of executable file types (.exe, .bat, .sh, etc.)
- Failed file upload attempts with suspicious filenames
Network Indicators:
- HTTP POST requests to file upload endpoints with executable content
- Unusual outbound connections from Cognos Controller server
SIEM Query:
source="cognos_controller" AND (event="file_upload" AND file_extension IN ("exe", "bat", "sh", "ps1", "jar"))