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Carriage Return and Line Feed (CRLF) Injection
Carriage Return and Line Feed (CRLF) Injection is a type of injection attack that targets web applications. This type of attack is also known as HTTP Response Splitting.
The attack works by injecting CRLF characters into user input fields on a website. These characters are used to separate HTTP headers from the body of a response. By injecting these characters, an attacker can split the HTTP response into two parts, allowing them to inject their own HTTP headers and potentially execute malicious code.
For example, an attacker could inject CRLF characters into the "Referer" header of an HTTP request. This could allow them to inject their own HTTP headers and execute code on the server or the client's browser.
To prevent CRLF Injection attacks, developers should validate all user input and sanitize it before using it in HTTP responses. It's also important to encode any user input that is included in HTTP headers or response bodies.
In addition, web application firewalls (WAFs) can help protect against CRLF Injection attacks by filtering out requests that contain suspicious characters. However, these should not be relied upon as the sole protection against CRLF Injection attacks.
In conclusion, CRLF Injection attacks can be dangerous and should be taken seriously by web developers. By following best practices for input validation and encoding, developers can help prevent these types of attacks and keep their web applications secure. is a type of injection attack that targets web applications. This type of attack is also known as HTTP Response Splitting.
The attack works by injecting CRLF characters into user input fields on a website. These characters are used to separate HTTP headers from the body of a response. By injecting these characters, an attacker can split the HTTP response into two parts, allowing them to inject their own HTTP headers and potentially execute malicious code.
For example, an attacker could inject CRLF characters into the "Referer" header of an HTTP request. This could allow them to inject their own HTTP headers and execute code on the server or the client's browser.
To prevent CRLF Injection attacks, developers should validate all user input and sanitize it before using it in HTTP responses. It's also important to encode any user input that is included in HTTP headers or response bodies.
In addition, web application firewalls (WAFs) can help protect against CRLF Injection attacks by filtering out requests that contain suspicious characters. However, these should not be relied upon as the sole protection against CRLF Injection attacks.
In conclusion, CRLF Injection attacks can be dangerous and should be taken seriously by web developers. By following best practices for input validation and encoding, developers can help prevent these types of attacks and keep their web applications secure.
For Detailed Explanation Refer to :
https://github.com/swisskyrepo/PayloadsAllTheThings/tree/master/CRLF%20Injection
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