Enabling SameSite Cookie Rules

For additional cookie security, enable support for applying SameSite cookie rules, as described in the internet-draft Cookies: HTTP State Management Mechanism.

You can configure the AM server to apply SameSite cookie rules by navigating to Configure > Server Defaults > Advanced, and setting the com.sun.identity.cookie.samesite property's value to one of the following:

strict

Requests originating from different sites will not have cookies sent with them.

When this mode is enabled, any AM functionality that relies on requests being redirected back to the AM instance may not operate correctly. For example, OAuth 2.0 flows and SAML federation may not operate correctly if AM cannot access the required cookies.

lax

Cookies received from different sites cannot be accessed, unless the request is using a top-level request, and uses a "safe" HTTP method, such as GET, HEAD, OPTIONS, or TRACE.

off

No restrictions on the domain of cookies is applied. This is the default setting.

You must disable SameSite support if any of the following is true:

You have set Access-Control-Allow-Credentials=true in your CORS configuration. For more information on configuring CORS in AM, see "Configuring CORS Support".
You are using SAML HTTP-POST bindings. For example, IDP-initiated single logout (SLO) functionality will not operate correctly if SameSite support is enabled, as the iPlanetDirectoryPro cookie would not be accessible in cross-domain POST requests. For more information on SAML single logout, see Implementing SSO and SLO.

Caution

Modern browsers only allow disabling SameSite if the cookie is marked as Secure. If you need to handle cross-site requests with cookies, you should move to HTTPS-only environment.