Ishan Chattopadhyaya created SOLR-16777:
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Summary: 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
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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