CVE-2024-1226
📋 TL;DR
This CVE describes an HTTP header injection vulnerability where unvalidated user input is included in HTTP headers, allowing attackers to manipulate HTTP responses. This affects systems running vulnerable versions of Rejetto HTTP File Server software. Attackers can exploit this to conduct cross-site scripting attacks, cache poisoning, or control browser responses.
💻 Affected Systems
- Rejetto HTTP File Server
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of user sessions via cross-site scripting leading to credential theft, malware distribution, or complete control over HTTP responses to clients.
Likely Case
Cross-site scripting attacks against users accessing the vulnerable server, potentially stealing session cookies or redirecting to malicious sites.
If Mitigated
Limited impact with proper input validation and output encoding in place, though some risk remains if other vulnerabilities exist.
🎯 Exploit Status
HTTP header injection vulnerabilities typically have low exploitation complexity when unauthenticated access is possible
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check vendor advisory for specific patched version
Vendor Advisory: https://www.incibe.es/en/incibe-cert/notices/aviso/multiple-vulnerabilities-rejettos-http-file-server
Restart Required: Yes
Instructions:
1. Visit the vendor advisory URL to identify patched version. 2. Download and install the latest version of Rejetto HTTP File Server. 3. Restart the HTTP File Server service. 4. Verify the update was successful.
🔧 Temporary Workarounds
Input Validation Filter
allImplement strict input validation to reject or sanitize any user input containing HTTP header injection characters (CR, LF, colon, etc.)
Implement input validation in application code to filter: \r, \n, :, and other header-related characters
Web Application Firewall Rules
allConfigure WAF to block requests containing HTTP header injection patterns
Add WAF rule to block requests containing patterns like: \r\n, %0d%0a, or suspicious header manipulation attempts
🧯 If You Can't Patch
- Implement network segmentation to isolate vulnerable servers from critical systems
- Deploy web application firewall with specific rules to detect and block HTTP header injection attempts
🔍 How to Verify
Check if Vulnerable:
Check if running Rejetto HTTP File Server and compare version against vendor advisory; test by attempting to inject headers via user inputCheck Version:
Check HTTP File Server interface or configuration files for version informationVerify Fix Applied:
Verify updated to patched version per vendor advisory; test that header injection attempts are properly rejected or sanitized📡 Detection & Monitoring
Log Indicators:
- Unusual HTTP headers in requests
- Requests containing CR/LF characters in parameters
- Multiple failed attempts with header manipulation patterns
Network Indicators:
- HTTP requests with crafted headers containing injection characters
- Responses with unexpected or malicious headers
SIEM Query:
search 'http.request.headers contains "\r\n" OR http.request.parameters contains "%0d%0a"'