CVE-2024-39736
📋 TL;DR
IBM Datacap Navigator versions 9.1.5 through 9.1.9 are vulnerable to HTTP header injection due to improper validation of HOST headers. This allows attackers to inject malicious HTTP headers, potentially leading to cross-site scripting, cache poisoning, or session hijacking attacks. Organizations using these versions of IBM Datacap Navigator are affected.
💻 Affected Systems
- IBM Datacap Navigator
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attacker hijacks user sessions, steals credentials, or redirects users to malicious sites through cache poisoning, potentially compromising the entire Datacap environment.
Likely Case
Cross-site scripting attacks that steal session cookies or redirect users to phishing sites, leading to credential theft or unauthorized access.
If Mitigated
Limited impact with proper input validation and output encoding in place, though some header manipulation may still be possible.
🎯 Exploit Status
HTTP header injection typically requires minimal technical skill to exploit once the vulnerability is understood.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Apply IBM Datacap Navigator Interim Fixes as specified in vendor advisory
Vendor Advisory: https://www.ibm.com/support/pages/node/7160185
Restart Required: Yes
Instructions:
1. Review IBM advisory at https://www.ibm.com/support/pages/node/7160185
2. Download appropriate interim fix for your version
3. Apply fix following IBM installation procedures
4. Restart Datacap Navigator services
🔧 Temporary Workarounds
Web Application Firewall (WAF) Rules
allConfigure WAF to block or sanitize malicious HOST header values
Reverse Proxy Header Validation
allConfigure reverse proxy to validate and sanitize HOST headers before forwarding to Datacap Navigator
🧯 If You Can't Patch
- Implement network segmentation to isolate Datacap Navigator from untrusted networks
- Deploy web application firewall with specific rules to detect and block HTTP header injection attempts
🔍 How to Verify
Check if Vulnerable:
Check Datacap Navigator version via administrative interface or configuration files. If version is 9.1.5 through 9.1.9, system is vulnerable.Check Version:
Check Datacap Navigator configuration files or administrative console for version informationVerify Fix Applied:
Verify patch installation through Datacap Navigator administrative interface and test with controlled HOST header injection attempts.📡 Detection & Monitoring
Log Indicators:
- Unusual HOST header values in web server logs
- Multiple failed header validation attempts
Network Indicators:
- HTTP requests with malformed or suspicious HOST headers
- Unexpected redirects or cache manipulation
SIEM Query:
source="web_server_logs" AND (HOST HEADER CONTAINS "javascript:" OR HOST HEADER CONTAINS "<script>" OR HOST HEADER LENGTH > 100)