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https://issues.apache.org/jira/browse/SOLR-16776?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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David Smiley resolved SOLR-16776.
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Resolution: Duplicate
Closing as duplicate of SOLR-14853 created a couple years ago and now has a PR.
> Disable remote streaming by default using sysprop
> -------------------------------------------------
>
> Key: SOLR-16776
> URL: https://issues.apache.org/jira/browse/SOLR-16776
> Project: Solr
> Issue Type: Bug
> Reporter: Ishan Chattopadhyaya
> Assignee: David Smiley
> Priority: Critical
> Attachments: SOLR-16776.patch
>
> Time Spent: 40m
> Remaining Estimate: 0h
>
> Remote streaming is a vulnerability in Solr that allows a user to make Solr
> talk to arbitrary HTTP servers. It is disabled by default, but easily enabled
> using config API. This issue is to disable it more properly, at a node level,
> and add an additional system property per node to disable it by default. To
> continue using this feature, pass {{-Denable.remote.streams=true}} to the
> startup, and then enable it on a per collection/configset basis as needed.
>
> As per Skay's report
> [https://twitter.com/Skay_00/status/1646870062601756672|https://twitter.com/Skay_00/status/1646870062601756672),]
> remote code execution is possible in unsecured Solr clusters where
> authentication hasn't been enabled. This ticket is to mitigate one aspect of
> that, i.e. remote streaming. While our recommendation to all users remains
> the same, i.e. to secure Solr installations with authentication and
> authorization, I thank Skay for his detailed report.
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