On Tuesday, 4 August 2015 01:41:18 UTC-4, Hiroto Mukouhara wrote:
>
> The new session id is created when the http request header contains
> 'Pragma'='no-cache' on our RoR environment. Our goal is that the session
> id is preserved if the http request header contains 'Pragma'='no-cache'.
> Please let us know how to preserve the session id.
>
> The detailed sequence is shown below:
>
> 1. The user downloads the Microsoft World file from RoR application, and
>    opens that file using 'Protected View'.
>
> 2. The user clicks the url link which is written in that Word file. The
>    clicked url link points to a page which is located on that RoR
>    application.
>
> 3. On opening that url link, the http request header contains
>    'Pragma'='no-cache', and the new session id is created with the http
>    response header which contains 'Set-Cookie'. 
>
> If the user opens that file not using 'Protected View' on the sequence 1,
> the session id is preserved on the sequence 3. The http request header
> doesn't contain 'Pragma'='no-cache'.
>

I can't find much documentation for Protected View, but there's some 
indication that it may be fiddling with the context that the web request 
uses when you click on the link:

https://onmessages.wordpress.com/2015/01/19/a-security-problem-has-occurred-in-word/

This may be a security restriction to prevent malicious documents from 
including hyperlinks to third-party sites that rely on the user's existing 
cookies to do XSS.

--Matt Jones

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