[jira] [Updated] (SLING-2572) Redirect validating service

["Carsten Ziegeler (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SLING-2572?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Carsten Ziegeler updated SLING-2572:
------------------------------------

    Component/s:     (was: General)
                 Authentication

> Redirect validating service
> ---------------------------
>
>                 Key: SLING-2572
>                 URL: https://issues.apache.org/jira/browse/SLING-2572
>             Project: Sling
>          Issue Type: Improvement
>          Components: Authentication
>            Reporter: Jeff Young
>              Labels: security
>
> Clients need to validate redirects to esure that they point on-site (or perhaps to an authority on a white-list) to prevent phishing attacks.  A Sling service which performed this would allow consistency (and a single point of extension).
> There already exists AuthUtil.isRedirectValid() [0], but it doesn't handle URLs (only paths), and disallows relative paths (the second of which, at least, is widely used).
> There is also a referrer validating service [1] which might provide a better starting point.
> Lastly, if we had backward-compatibility concerns with some of the algorithms encoded in those methods/services, we might choose to provide a very basic default implementation which simply drops any scheme and/or authority from the URL, and let customers do white-lists and/or other more sophisticated checks as customizations.
> References:
> [0] https://svn.apache.org/repos/asf/sling/trunk/bundles/auth/core/src/main/java/org/apache/sling/auth/core/AuthUtil.java
> [1] https://svn.apache.org/repos/asf/sling/trunk/contrib/extensions/security/impl/ReferrerFilter.java



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