CVE-2024-39741
📋 TL;DR
This vulnerability allows remote attackers to perform directory traversal attacks on IBM Datacap Navigator systems. By sending specially crafted URLs containing 'dot dot' sequences (/../), attackers can access arbitrary files on the server. This affects IBM Datacap Navigator versions 9.1.5 through 9.1.9.
💻 Affected Systems
- IBM Datacap Navigator
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise through sensitive file disclosure (e.g., configuration files, credentials, system files) leading to further attacks.
Likely Case
Unauthorized access to sensitive application files, configuration data, or limited system files depending on server permissions.
If Mitigated
Limited impact with proper file system permissions and network segmentation restricting access to sensitive files.
🎯 Exploit Status
Exploitation requires only HTTP requests with directory traversal sequences, making it simple to execute.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Apply IBM Datacap Navigator Interim Fix 9.1.9.0-IF1 or later
Vendor Advisory: https://www.ibm.com/support/pages/node/7160185
Restart Required: Yes
Instructions:
1. Download the interim fix from IBM Fix Central. 2. Stop the Datacap Navigator service. 3. Apply the fix according to IBM documentation. 4. Restart the service. 5. Verify the fix is applied.
🔧 Temporary Workarounds
Web Application Firewall (WAF) Rules
allConfigure WAF to block requests containing directory traversal patterns (/../, %2e%2e%2f, etc.)
Network Segmentation
allRestrict access to Datacap Navigator to trusted networks only
🧯 If You Can't Patch
- Implement strict file system permissions to limit what files the application user can access
- Deploy a reverse proxy with request filtering to block malicious URL patterns
🔍 How to Verify
Check if Vulnerable:
Test by sending HTTP requests with directory traversal sequences to the Datacap Navigator endpoint and checking for file disclosure.Check Version:
Check the Datacap Navigator version in the application interface or configuration files.Verify Fix Applied:
After applying the fix, retest directory traversal attempts; they should return error messages instead of file contents.📡 Detection & Monitoring
Log Indicators:
- HTTP requests containing /../ patterns
- Unusual file access patterns from web requests
- Error logs showing failed file access attempts
Network Indicators:
- HTTP traffic with URL-encoded directory traversal sequences
- Multiple failed file access attempts from single IP
SIEM Query:
source="web_server_logs" AND (url="*../*" OR url="*%2e%2e%2f*")