[SOLR-13669] [CVE-2019-0193] Remote Code Execution via DataImportHandler

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 7.7.3, 8.1.2, 8.2
• Component/s: contrib - DataImportHandler
• Assignee: David Smiley
• Reporter: Michael Stepankin
• Created: 31/Jul/19 22:05
• Updated: 29/Nov/20 06:01
• Resolved: 30/Nov/19 05:03

Description

The DataImportHandler, an optional but popular module to pull in data from databases and other sources, has a feature in which the whole DIH configuration can come from a request's "dataConfig" parameter. The debug mode of the DIH admin screen uses this to allow convenient debugging / development of a DIH config. Since a DIH config can contain scripts, this parameter is a security risk. Starting with version 8.2.0 of Solr, use of this parameter requires setting the Java System property "enable.dih.dataConfigParam" to true.

Mitigations:

• Upgrade to 8.2.0 or later, which is secure by default.
• or, edit solrconfig.xml to configure all DataImportHandler usages with an "invariants" section listing the "dataConfig" parameter set to am empty string.
• Ensure your network settings are configured so that only trusted traffic communicates with Solr, especially to the DIH request handler. This is a best practice to all of Solr.

Credits:

• Michael Stepankin

References:

• https://issues.apache.org/jira/browse/SOLR-13669
• https://cwiki.apache.org/confluence/display/solr/SolrSecurity

Issue Links

• relates to: SOLR-13873 Is there any fix for CVE-2019-0193 issue for solr 7.7.1
• links to: GitHub Pull Request #1260