renew=true, risk of bypassing?

[Pablo Vidaurri]

So I have an application with certain parts allowing a  long SSO session and other areas that require login every time.

I know I can leverage the renew query parameter but how to avoid the user from simply removing it and then access the secured part of the app without logging in again?

For example, I want the user to provide their credentials every time they access their profile. So if there is already have an active session for https://www.myapp.com and they access their profile, i will redirect them to https://www.mycas.com/auth/login?renew=true&TARGET=https://www.myapp.com/myprofile

This works, but I can also remove the renew query parameter and directly hit myprofile page since I already have a session to the app.

[Richard Frovarp]

Part of the response metadata coming back is if the authentication is from a new login. I think it will also tell you what time the auth happened. Don't trust the user provided data, validate that what CAS is telling you matches your security requirement. If it doesn't, don't let them pass.

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[Misagh]

When you validate the ticket, specify "renew=true".

Review this:
https://apereo.github.io/cas/6.5.x/protocol/CAS-Protocol-Specification.html#251-parameters

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[Ray Bon]

Pablo,

You can turn off SSO for an application in the service definition, https://apereo.github.io/cas/6.5.x/services/Configuring-Service-Access-Strategy.html

Ray

On Tue, 2022-08-16 at 10:13 -0700, Pablo Vidaurri wrote:

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[Pablo Vidaurri]

cant as the same app requires normal session and renew session ... exploring Misagh's suggestion of renew on ticket validation