A lucene-solr security update has been released for Debian GNU/Linux 9 LTS to address a security vulnerability.

DLA 2327-1: lucene-solr security update

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Debian LTS Advisory DLA-2327-1 debian-lts@lists.debian.org
  https://www.debian.org/lts/security/ Markus Koschany
August 15, 2020 htps://wiki.debian.org/LTS
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Package : lucene-solr
Version : 3.6.2+dfsg-10+deb9u3
CVE ID : CVE-2019-0193

A security vulnerability was discovered in lucene-solr, an enterprise
search server.

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 from now on, use
of this parameter requires setting the Java System property
"enable.dih.dataConfigParam" to true. For example this can be achieved
with solr-tomcat by adding -Denable.dih.dataConfigParam=true to
JAVA_OPTS in /etc/default/tomcat8.

For Debian 9 stretch, this problem has been fixed in version
3.6.2+dfsg-10+deb9u3.

We recommend that you upgrade your lucene-solr packages.

For the detailed security status of lucene-solr please refer to
its security tracker page at:
  https://security-tracker.debian.org/tracker/lucene-solr

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at:   https://wiki.debian.org/LTS