CVE-2019-0193

CVE Published	2019-08-01
Related CWE(s)	CWE-94: Improper Control of Generation of Code ('Code Injection')
Related Vendor(s)	debian, apache
Related Product(s)	solr, debian_linux
Exploitation Reported (CISA KEV)	2021-12-10
CVSS 3 Base Score	7.2 (HIGH)
CVSS 3 Attack Complexity	LOW
CVSS 3 Attack Vector	NETWORK

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.

Cyber Threat Graph Context

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Associated CAPEC Patterns

Manipulating User-Controlled Variables (CAPEC-77)

This attack targets user controlled variables (DEBUG=1, PHP Globals, and So Forth). An adversary can override variables leveraging user-supplied, untrusted query variables directly used on the application server without any data sanitization. In extreme cases, the adversary can change variables controlling the business logic of the application. For instance, in languages like PHP, a number of poorly set default configurations may allow the user to override variables.

Leverage Executable Code in Non-Executable Files (CAPEC-35)

An attack of this type exploits a system's trust in configuration and resource files. When the executable loads the resource (such as an image file or configuration file) the attacker has modified the file to either execute malicious code directly or manipulate the target process (e.g. application server) to execute based on the malicious configuration parameters. Since systems are increasingly interrelated mashing up resources from local and remote sources the possibility of this attack occurring is high.

Code Injection (CAPEC-242)

An adversary exploits a weakness in input validation on the target to inject new code into that which is currently executing. This differs from code inclusion in that code inclusion involves the addition or replacement of a reference to a code file, which is subsequently loaded by the target and used as part of the code of some application.

References

CVE.org

View more information about CVE-2019-0193 on the official MITRE CVE website.

NIST National Vulnerability Database

CVE-2019-0193 on the NIST NVD.

CISA Known Exploited Vulnerabilities