QID 153001

Date Published: 2023-07-14

QID 153001: Ruby on Rails - HTTP Response Splitting (CRLF Injection)

HTTP Response Splitting attacks occur when the server-side application embeds user-supplied data in HTTP response headers. When a user manages to submit a CRLF - Carriage Return (%0d or \r) Line Feed (%0a or \n) characters into an application by modifying an HTTP parameter or URL. Example: An application that embeds user-supplied data in the Location header of a redirection response and an application that embeds user-supplied data in a cookie value.

As a result of an HTTP Response Splitting attack, user-supplied data becomes part of the HTTP response headers, and can facilitate several attacks including HTML injection, cross-site scripting, web cache poisoning, hijacking pages with user-specific information, and browser cache poisoning.

CVSS V3 rated as High - 6.5 severity.

CVSS V2 rated as High - 6.4 severity.

Solution

Any data from the client side should be URL-encoded before inclusion into HTTP Response headers. Carriage return and line feed characters should be rejected as well.

Vendor References

CVEs related to QID 153001

Software Advisories

Advisory ID	Software	Component	Link

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