CRV2 ClientSideCodeJackingFraming

In order to help prevent clickjacking or UI redress attacks one of the following headers should be in all HTTP response headers.

X-Frame-Options HTTP Response Header

// to prevent all framing of this content response.addHeader( "X-FRAME-OPTIONS", "DENY" );

// to allow framing of this content only by this site response.addHeader( "X-FRAME-OPTIONS", "SAMEORIGIN" );

// to allow framing from a specific domain response.addHeader( "X-FRAME-OPTIONS", "ALLOW-FROM X" );

Older browsers dont usderstand the above headers. In order to help prevent regress attacks we may see the following code on the client side files.

Legacy Browser Clickjacking Defense body{display:none !important;}  if (self === top) { var antiClickjack = document.getElementByID("antiCJ"); antiClickjack.parentNode.removeChild(antiClickjack) }    else { top.location = self.location; }