HOST Header Injection in HCL Aftermarket EPC

Executive Summary

HCL Aftermarket EPC is vulnerable because it does not validate the HOST header in HTTP requests. This allows attackers to send requests with arbitrary host values, which can lead to Host header poisoning and server misconfigurations.

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Detection Guidance

To detect this vulnerability, check if the application improperly handles the HOST header in HTTP requests. Use tools like curl to send requests with modified HOST headers and observe responses for inconsistencies or unexpected behavior. Example: curl -H "HOST: malicious.example.com" http://target-server. If the server responds without validation, it may be vulnerable.

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Impact Analysis

This vulnerability could allow attackers to manipulate server behavior, redirect users to malicious sites, or bypass security controls. It may also lead to cache poisoning or other attacks exploiting improper host header handling.

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Compliance Impact

This vulnerability does not directly affect compliance with GDPR or HIPAA as it primarily involves Host header manipulation risks such as poisoning or server misconfigurations. However, improper input validation could indirectly lead to data exposure or unauthorized access, which may violate compliance requirements if exploited.

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Mitigation Strategies

Implement input validation for the HOST header in the application to ensure only expected values are accepted. Configure the web server to restrict or sanitize HOST header values. Update the application to reject requests with unexpected or arbitrary HOST headers.

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