CVE-2017-12629 : Exploit Details and Defense Strategies

A security issue involving remote code execution in Apache Solr and Apache Lucene versions prior to 7.1 is detailed in this CVE.

Understanding CVE-2017-12629

This CVE describes vulnerabilities in Apache Solr and Apache Lucene that can lead to remote code execution.

What is CVE-2017-12629?

Involves remote code execution by exploiting XXE in combination with a Config API add-listener command targeting the RunExecutableListener class.
Vulnerabilities affect Apache Solr versions before 7.1 and Apache Lucene versions before 7.1.
Elasticsearch, despite using Lucene, is not vulnerable to this specific issue.
XML external entity expansion vulnerability in the XML Query Parser allows uploading malicious data and conducting Blind XXE attacks.

The Impact of CVE-2017-12629

Allows attackers to execute remote code on affected systems.
Enables unauthorized access to sensitive data stored on the Solr server.

Technical Details of CVE-2017-12629

This section provides detailed technical information about the CVE.

Vulnerability Description

Exploitation of XXE in conjunction with the Config API add-listener command targeting the RunExecutableListener class.
XML external entity expansion vulnerability in the XML Query Parser.

Affected Systems and Versions

Apache Solr versions before 7.1 and Apache Lucene versions before 7.1 are vulnerable.
Custom versions of lucene-solr less than 7.1.0 are also affected.

Exploitation Mechanism

Attackers can leverage XXE and Config API add-listener command to execute remote code.
XML external entity expansion vulnerability allows uploading malicious data and conducting Blind XXE attacks.

Mitigation and Prevention

Protect your systems from CVE-2017-12629 with the following steps:

Immediate Steps to Take

Update Apache Solr and Apache Lucene to versions 7.1 or higher.
Disable the XML Query Parser if not required.
Implement strict input validation to prevent XXE attacks.

Long-Term Security Practices

Regularly monitor for security advisories and updates from Apache.
Conduct security audits to identify and address vulnerabilities proactively.

Patching and Updates

Apply patches provided by Apache to address CVE-2017-12629.