Vulnerability Report: Host Header Poisoning on v3.0.2

[Christbowel]

Description

I would like to report a vulnerability in the project's handling of the Host header, which could lead to Host Header Poisoning attacks. This vulnerability arises from insufficient validation and filtering of the Host header value in HTTP requests, allowing attackers to manipulate the Host header and potentially exploit it for malicious purposes.

Vulnerability Details

When an HTTP request is made to the project's server, the server appears to utilize the Host header value without proper validation or filtration. This could enable attackers to specify a malicious Host header, such as "evil.com", leading to several potential exploits including but not limited to:

1. Redirecting users to malicious sites.
2. Injecting malicious content into pages.
3. Conducting phishing attacks by presenting misleading content to users.

Steps to Reproduce

1. Craft an HTTP request targeting the project's server.
2. Manipulate the Host header to contain a malicious domain.
3. Observe potential impacts such as redirections or injection of malicious content.

Recommendation

It is recommended to implement robust validation and filtration mechanisms for the Host header value. This can include:

Verifying that the domain specified in the Host header matches expected domains for the application.
Ensuring that links and redirects generated by the server are based on validated and approved domain values.
Employing security measures such as whitelisting for allowed Host header values.
Additional Information:
This vulnerability poses a significant risk to the security and integrity of the project's web server. I am available to provide further assistance or clarification on this matter.

Thank you for addressing this issue promptly and prioritizing the security of the project.

Sincerely,

christbowel