Apache Solr DataImportHandler Code Injection Vulnerability

A remote attacker, with administrative privileges, can achieve full data confidentiality loss, arbitrary modification of data, complete denial of service or system unavailability. Federal agencies are required to remediate by 2022-06-10 under CISA BOD 22-01.

This is a Code Injection (CWE-94) vulnerability in Apache Solr. In Apache Solr, 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. Exploitation requires remote network access, low attack complexity, an administrative account, and no user interaction required.

Probably yes if any of these apply:

CISA added this CVE to the Known Exploited Vulnerabilities catalog on 2021-12-10 based on evidence of active exploitation in the wild. Federal agencies required to remediate by 2022-06-10.