CVE-2024-51451
📋 TL;DR
IBM Concert versions 1.0.0 through 2.1.0 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 running affected IBM Concert versions are at risk.
💻 Affected Systems
- IBM Concert
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers could hijack user sessions, redirect users to malicious sites, poison web caches to serve malicious content to multiple users, or execute arbitrary JavaScript in victims' browsers.
Likely Case
Attackers would most likely conduct cross-site scripting attacks to steal session cookies or credentials, or perform cache poisoning to distribute malicious content.
If Mitigated
With proper input validation and output encoding, the impact would be limited to unsuccessful injection attempts that are blocked by security controls.
🎯 Exploit Status
HTTP header injection typically requires minimal technical skill to exploit once the vulnerability is understood.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: IBM Concert 2.1.1 or later
Vendor Advisory: https://www.ibm.com/support/pages/node/7257006
Restart Required: Yes
Instructions:
1. Download IBM Concert version 2.1.1 or later from IBM's official distribution channels. 2. Backup current configuration and data. 3. Stop the IBM Concert service. 4. Install the updated version. 5. Restart the IBM Concert service. 6. Verify the update was successful.
🔧 Temporary Workarounds
Web Application Firewall (WAF) Rules
allConfigure WAF rules to block or sanitize malicious HOST header values
Reverse Proxy Header Validation
allConfigure reverse proxies (like nginx or Apache) to validate and sanitize HOST headers before they reach IBM Concert
🧯 If You Can't Patch
- Implement strict input validation at the network perimeter to filter malicious HOST header values
- Monitor for unusual HTTP header patterns and implement rate limiting on HTTP requests
🔍 How to Verify
Check if Vulnerable:
Check IBM Concert version via administrative interface or configuration files. If version is between 1.0.0 and 2.1.0 inclusive, the system is vulnerable.Check Version:
Check the version in the IBM Concert administrative console or configuration files (location varies by installation)Verify Fix Applied:
Verify IBM Concert version is 2.1.1 or later. Test with controlled HOST header injection attempts to confirm they are properly rejected.📡 Detection & Monitoring
Log Indicators:
- Unusual HOST header values in HTTP request logs
- Multiple failed injection attempts with malformed headers
- Requests with unusually long or complex HOST headers
Network Indicators:
- HTTP requests with malicious HOST header patterns
- Unusual traffic patterns to IBM Concert endpoints
SIEM Query:
source="ibm_concert_logs" AND (HOST HEADER CONTAINS "javascript:" OR HOST HEADER CONTAINS "<script>" OR HOST HEADER CONTAINS "data:")