CVE-2019-12418 : Security Advisory and Response

Apache Tomcat versions 9.0.0.M1 to 9.0.28, 8.5.0 to 8.5.47, and 7.0.0 to 7.0.97 are vulnerable to a local privilege escalation attack through the JMX Remote Lifecycle Listener.

Understanding CVE-2019-12418

This CVE involves a vulnerability in Apache Tomcat that allows unauthorized users to execute a man-in-the-middle attack to obtain sensitive information.

What is CVE-2019-12418?

When Apache Tomcat is configured with the JMX Remote Lifecycle Listener, attackers without local access can exploit the RMI registry to intercept user credentials used to access the JMX interface, leading to complete control over the Tomcat instance.

The Impact of CVE-2019-12418

The vulnerability enables attackers to gain unauthorized access to sensitive user credentials and potentially take over the affected Tomcat instance, posing a significant security risk.

Technical Details of CVE-2019-12418

Apache Tomcat's vulnerability allows for a local privilege escalation attack through the JMX Remote Lifecycle Listener.

Vulnerability Description

The flaw in Apache Tomcat versions 9.0.0.M1 to 9.0.28, 8.5.0 to 8.5.47, and 7.0.0 to 7.0.97 permits unauthorized users to exploit the RMI registry, compromising user credentials and gaining control over the Tomcat instance.

Affected Systems and Versions

Apache Tomcat 9.0.0.M1 to 9.0.28
Apache Tomcat 8.5.0 to 8.5.47
Apache Tomcat 7.0.0 to 7.0.97

Exploitation Mechanism

Attackers can manipulate the RMI registry through the JMX Remote Lifecycle Listener to intercept user names and passwords, subsequently using these credentials to access and control the Tomcat instance.

Mitigation and Prevention

To address CVE-2019-12418, follow these security measures:

Immediate Steps to Take

Disable the JMX Remote Lifecycle Listener if not required
Implement network segmentation to restrict access to vulnerable services
Monitor and log network traffic for any suspicious activities

Long-Term Security Practices

Regularly update Apache Tomcat to the latest secure versions
Conduct security audits and penetration testing to identify vulnerabilities
Educate users on secure password practices and access control

Patching and Updates

Apply security patches provided by Apache Software Foundation to mitigate the CVE-2019-12418 vulnerability.