====================================================================

                             CERT-Renater

                 Note d'Information No. 2019/VULN238

_____________________________________________________________________

DATE                : 01/08/2019

HARDWARE PLATFORM(S): /

OPERATING SYSTEM(S):Systems running Apache Solr versions prior to 8.2.0.

=====================================================================
http://mail-archives.apache.org/mod_mbox/lucene-solr-user/201907.mbox/%3cCABEwPvFUCvdWQbgVSk6W0zQvm_HaM00oToNKgenRTBrhPgtGfw@mail.gmail.com%3e
_____________________________________________________________________

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 (JPMorgan Chase)

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

Please direct any replies as either comments in the JIRA issue above or
to solr-user@lucene.apache.org

=========================================================
+ CERT-RENATER        | tel : 01-53-94-20-44            +
+ 23/25 Rue Daviel    | fax : 01-53-94-20-41            +
+ 75013 Paris         | email:cert@support.renater.fr   +
=========================================================