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https://issues.apache.org/jira/browse/SOLR-2854?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13137226#comment-13137226
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David Smiley commented on SOLR-2854:
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Regarding future steps to take to make Solr more secure with regards to remote
streaming: Personally, I think that, by default, the only handlers that should
be able to use this are /update/ registered handlers. That makes Solr easier to
secure and is also the biggest use case for this feature. I'd like it to be
clearer in solrconfig.xml exactly which handlers can use remote streaming.
Presently, you have to have internal knowledge to know that /analysis/document
will use it -- and that's not cool from a security perspective. You suggested
limiting specific URLs or files or files vs URLs but I don't think that is
important.
> Limit remote streaming to update handlers
> -----------------------------------------
>
> Key: SOLR-2854
> URL: https://issues.apache.org/jira/browse/SOLR-2854
> Project: Solr
> Issue Type: Improvement
> Reporter: David Smiley
> Assignee: Erik Hatcher
> Labels: security
> Attachments: SOLR-2854-delay-stream-opening.patch,
> SOLR-2854-extract_fix.patch,
> SOLR-2854_test_remote_streaming_not_done_on_select.patch
>
>
> I think the remote streaming feature should be limited to update request
> processors. I'm not sure if there is even any use of using it on a /select,
> but even if there is, it's an unintended security risk. Observe this URL
> that is roughly the equivalent of an SQL injection attack:
> http://localhost:8983/solr/select?q=*:*&indent=on&wt=ruby&rows=2&stream.url=http%3A%2F%2Flocalhost%3A8983%2Fsolr%2Fupdate%3Fcommit%3Dtruetream.body%3D%3Cdelete%3E%3Cquery%3E*%3A*%3C%2Fquery%3E%3C%2Fdelete%3E
> Yep; that's right -- this *search* deletes all the data in your Solr
> instance! If you blocked off access to /update* based on IP then that isn't
> good enough.
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