The IESG has approved the following document: - 'HTTP Header Field X-Frame-Options' (draft-ietf-websec-x-frame-options-12.txt) as Informational RFC This document is the product of the Web Security Working Group. The IESG contact persons are Barry Leiba and Pete Resnick. A URL of this Internet Draft is: http://datatracker.ietf.org/doc/draft-ietf-websec-x-frame-options/ Technical Summary This informational document serves to document the existing use and specification of the X-Frame-Options HTTP response header field. To improve the protection of web applications against Clickjacking, this definition describes the X-Frame-Options HTTP response header field that declares a policy communicated from the server to the client browser on whether the browser may display the transmitted content in frames that are part of other web pages. Review and Consensus In 2009 and 2010 many browser vendors introduced the use of a non- standard HTTP header field "X-Frame-Options" to protect against Clickjacking. There have been differences between the various implementations which may cause security and interoperability concerns. This draft has been produced as informational by the websec working group to document the current use and also to function as a baseline for the future unified standard as part of the currently produced Content Security Policy 1.1 (by WebAppSec at the W3C) - and to get rid of the deprecated "X-" (see RFC6648). The review process took sufficient time and involved a medium amount of people with deep browser security knowledge. During the review process no major controversies came up, which is not too surprising as the draft is intended as informational and documenting. Personnel Yoav Nir is the Document Shepherd. Barry Leiba is the Responsible Area Director.
