Host Header Injection
Host Header Injection is a security vulnerability that occurs when an attacker manipulates the Host header value in an HTTP request to target a specific website or application. The Host header is used to specify the target domain or IP address of an HTTP request, and can be easily modified by an attacker.
By exploiting this vulnerability, an attacker can bypass security measures such as authentication and access sensitive information or perform malicious actions on the targeted website or application. For example, an attacker could use Host Header Injection to redirect a user to a phishing site or perform a cross-site scripting (XSS) attack.
To prevent Host Header Injection, developers can use techniques such as input validation and sanitization to ensure that the Host header value is valid and does not contain any malicious code or characters. Additionally, web servers can be configured to reject requests with invalid or unexpected Host header values.
Overall, it is important for developers and website administrators to understand and address the risks of Host Header Injection in order to secure their applications and protect user data.