CVE-2019-12409 : Exploit Details and Defense Strategies
Learn about CVE-2019-12409 affecting Apache Solr versions 8.1.1 and 8.2.0 for Linux. Understand the RCE vulnerability, its impact, and mitigation steps to secure your systems.
Apache Solr versions 8.1.1 and 8.2.0 for Linux have a security vulnerability due to an insecure configuration setting in the default solr.in.sh file, potentially leading to Remote Code Execution (RCE).
Understanding CVE-2019-12409
Apache Solr releases 8.1.1 and 8.2.0 are affected by a security issue in the default solr.in.sh configuration file, allowing unauthorized access to JMX monitoring.
What is CVE-2019-12409?
The vulnerability in Apache Solr versions 8.1.1 and 8.2.0 for Linux stems from an insecure setting in the default solr.in.sh file, enabling unauthorized JMX monitoring access.
The Impact of CVE-2019-12409
The security flaw in Apache Solr may permit attackers to execute malicious code on the server if JMX monitoring is enabled and exposed without authentication.
Technical Details of CVE-2019-12409
Apache Solr CVE-2019-12409 involves an insecure configuration setting in the default solr.in.sh file, potentially leading to Remote Code Execution (RCE).
Vulnerability Description
The ENABLE_REMOTE_JMX_OPTS configuration option in the default solr.in.sh file is set insecurely, allowing unauthorized access to JMX monitoring on RMI_PORT without authentication.
Affected Systems and Versions
- Product: Solr
- Vendor: Apache
- Versions: 8.1.1 and 8.2.0 for Linux
Exploitation Mechanism
If the default solr.in.sh file from the affected releases is used, JMX monitoring is enabled and exposed on RMI_PORT without authentication, potentially enabling malicious code execution.
Mitigation and Prevention
To address CVE-2019-12409, follow these steps:
Immediate Steps to Take
- Disable JMX monitoring if not required
- Implement network segmentation to restrict access to JMX ports
- Apply firewall rules to block unauthorized access
Long-Term Security Practices
- Regularly update and patch Apache Solr installations
- Monitor security mailing lists and vendor announcements for updates
Patching and Updates
- Apply the latest patches and updates from Apache to fix the vulnerability