Hi, 

Can you elaborate?  Is this a filter on client side or server side?  Which 
filter is this?

Thx,
Yan

On Friday, August 19, 2016 at 4:50:53 PM UTC-4, Misagh Moayyed wrote:
>
> You may need to bump the CAS security filter to the latest version, and 
> use filters it provides to set that option. Later CAS versions I suspect do 
> that already by default. 
>
> -- 
> Misagh
>
> From: Yan Zhou <[email protected]> <javascript:>
> Reply: Yan Zhou <[email protected]> <javascript:>
> Date: August 19, 2016 at 8:49:17 AM
> To: CAS Community <[email protected]> <javascript:>
> Subject:  [cas-user] CAS 4.1.X Cross-Frame Scripting/Clickjacking 
> prevention? 
>
> Hi, 
>
> We are running CAS 4.1.9 overlay. Our security team, after app scanning, 
> has reported that CAS has a security vulnerability:  Cross-frame scripting 
> which allows clickjacking.  Basically, CAS allows itself to be framed in 
> another app.  
>
> If I understand it correctly, an attacker will use iframe to frame the 
> login page, overlay the UI elements on Login form. User types in user 
> credential and click on Login, but, the credential is submitted first to 
> attacker's server, then, the form is submitted again to CAS server. User 
> gets in, he won't see difference, but the attacker already has user 
> credentials. 
>
> Their solution is to X-Frame-Option header on web server, that is quite 
> simple, no code change.
>
> Is this a vulnerability? It sounds so to me. 
>
> is there a list of things that we need to do in order secure CAS?  I did 
> not see any mention of this on CAS Security Guide page. 
>
> Thanks,
> Yan
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