[jira] [Updated] (SOLR-16777) Schema Designer blindly "trusts" potentially malicious configset

["Ishan Chattopadhyaya (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SOLR-16777?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ishan Chattopadhyaya updated SOLR-16777:
----------------------------------------
    Attachment: SOLR-16777.patch
      Assignee: Ishan Chattopadhyaya
        Status: Open  (was: Open)

Attaching a patch to fix this. All tests pass. I'm planning to commit this soon, would love to have someone review it.

> Schema Designer blindly "trusts" potentially malicious configset
> ----------------------------------------------------------------
>
>                 Key: SOLR-16777
>                 URL: https://issues.apache.org/jira/browse/SOLR-16777
>             Project: Solr
>          Issue Type: Bug
>      Security Level: Public(Default Security Level. Issues are Public) 
>            Reporter: Ishan Chattopadhyaya
>            Assignee: Ishan Chattopadhyaya
>            Priority: Critical
>         Attachments: SOLR-16777.patch
>
>
> When configset API is used to upload configsets by unauthenticated users, a "trusted: false" flag is set on the configset. Such configsets cannot use the <lib> directive to load classes while creating/loading collections.
> Unfortunately, this safety mechanism was bypassed in the schema designer when a isConfigsetTrusted was hardcoded to true. [https://github.com/apache/solr/blob/branch_9_1/solr/core/src/java/org/apache/solr/handler/designer/SchemaDesignerConfigSetHelper.java#L697]
>  
> 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. the schema designer vulnerability. 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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