CVE-2019-12401 Explained : Impact and Mitigation

Apache Solr versions 1.3.0 to 1.4.1, 3.1.0 to 3.6.2, and 4.0.0 to 4.10.4 are vulnerable to an XML resource consumption attack known as Lol Bomb, allowing attackers to cause out of memory errors (OOMs).

Understanding CVE-2019-12401

This CVE involves a vulnerability in Apache Solr versions that can be exploited through an XML resource consumption attack.

What is CVE-2019-12401?

CVE-2019-12401 is a security vulnerability in Apache Solr versions that allows attackers to execute an XML resource consumption attack, leading to out of memory errors.

The Impact of CVE-2019-12401

The vulnerability in Apache Solr versions can be exploited by attackers to trigger out of memory errors by utilizing XML DOCTYPE and ENTITY type elements.

Technical Details of CVE-2019-12401

Apache Solr vulnerability details and affected systems.

Vulnerability Description

The vulnerability in Apache Solr versions allows for an XML resource consumption attack, causing out of memory errors by manipulating XML DOCTYPE and ENTITY type elements.

Affected Systems and Versions

Apache Solr versions 1.3.0 to 1.4.1
Apache Solr versions 3.1.0 to 3.6.2
Apache Solr versions 4.0.0 to 4.10.4

Exploitation Mechanism

Attackers can exploit this vulnerability by crafting a specific XML structure that expands during server XML parsing, leading to out of memory errors.

Mitigation and Prevention

Protecting systems from CVE-2019-12401.

Immediate Steps to Take

Update Apache Solr to a non-vulnerable version.
Implement proper input validation to prevent malicious XML payloads.
Monitor system resources for unusual consumption.

Long-Term Security Practices

Regularly update and patch Apache Solr to the latest version.
Conduct security audits and penetration testing to identify vulnerabilities.
Educate developers and administrators on secure coding practices.

Patching and Updates

Apply patches provided by Apache for the affected versions.
Stay informed about security advisories and updates from Apache Solr.