CVE-2019-0193: Apache Solr DataImportHandler Code Injection Vulnerability

Vulnerability summary

CVE-2019-0193 is a high (CVSS 9.0) Code Injection vulnerability in Apache Solr. It is known to be exploited: CISA lists it, first on 10-12-2021. EPSS estimates a 83.55% chance of exploitation in the next 30 days, higher than 99.6% of scored vulnerabilities.

Timeline

1. 01-08-2019
   PublishedVulnerability first disclosed.
2. 10-12-2021
   Added to CISA KEVApache Solr DataImportHandler Code Injection Vulnerability
3. 10-06-2022
   CISA remediation dueApply updates per vendor instructions.
4. 21-10-2025
   Last modifiedVulnerability information updated.

Description

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.

• CWE-94Improper Control of Generation of Code ('Code Injection')The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.