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https://issues.apache.org/jira/browse/SOLR-14014?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17073284#comment-17073284
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Marcus Eagan commented on SOLR-14014:
-------------------------------------
[~dsmiley] I think the threat vector a web application with JavaScript
libraries is often unknown until an attacker strikes. From reading the comments
across a number of issues since I've been hacking on Solr, the Admin UI is not
the priority of the Solr committers at large at this time. That reality makes
the UI even more of a liability for some. Ignoring the attack surface of the
web entirely, a feature that is not needed for the essential function of an
application should be pluggable, or _un-plugabble_ in cases like this one where
the non-essential feature is still a nice-to-have for those who want it,
especially first-timers.
> Allow Solr to start with Admin UI disabled
> ------------------------------------------
>
> Key: SOLR-14014
> URL: https://issues.apache.org/jira/browse/SOLR-14014
> Project: Solr
> Issue Type: Improvement
> Components: Admin UI, security
> Affects Versions: master (9.0), 8.3.1
> Reporter: Jason Gerlowski
> Priority: Major
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> Currently Solr always runs the Admin UI. With the history of XSS issues and
> other security concerns that have been found in the Admin UI, Solr should
> offer a mode where the Admin UI is disabled. Maybe, and this is a topic
> that'll need some serious discussion, this should even be the default when
> Solr starts.
> NOTE: Disabling the Admin UI removes XSS and other attack vectors. But even
> with the Admin UI disabled, Solr will still be inherently unsafe without
> firewall protection on a public network.
> *Proposed design:*
> A java system property called *headless* will be used as an internal flag for
> starting Solr in headless mode. This property will default to true. A java
> property can be used at startup to set this flag to false.
> Here is an example:
> {code:java}
> bin/solr start -Dheadless=false {code}
> A message will be added following startup describing the mode.
> In headless mode the following message will be displayed:
> "solr is running in headless mode. The admin console is unavailable. To to
> turn off headless mode and allow the admin console use the following
> parameter startup parameter:
> -Dheadless=false
>
> In non-headless mode the following message will be displayed:
> "solr is running with headless mode turned off. The admin console is
> available in this mode. Disabling the Admin UI removes XSS and other attack
> vectors"
> If a user attempts to access the admin console while Solr is in headless mode
> it Solr will return 401 unauthorized.
>
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