Facebook Google Plus Twitter LinkedIn YouTube RSS Menu Search Resource - BlogResource - WebinarResource - ReportResource - Eventicons_066 icons_067icons_068icons_069icons_070

Tenable Blog

Subscribe

CVE-2019-7609: Exploit Script Available for Kibana Remote Code Execution Vulnerability

An exploit script for the previously patched Kibana vulnerability is now available on GitHub.

Background

On October 21, an exploit script was published to GitHub for a patched vulnerability in Kibana, the open-source data visualization plugin for Elasticsearch. Elasticsearch and Kibana are part of the popular Elastic Stack (also known as ELK Stack), a series of open-source applications used for centralized log management.

Analysis

CVE-2019-7609 is an arbitrary code execution vulnerability in Kibana’s Timelion visualizer. The vulnerability was patched in February 2019.

According to Elastic’s advisory for the flaw, an attacker capable of accessing the Timelion application “could send a request that will attempt to execute javascript code” that could result in the attacker executing arbitrary commands on the host under the same permissions as the vulnerable Kibana process.

On October 14, Michał Bentkowski, a security researcher at Securitum, presented a talk at OWASP Poland Day about Prototype Pollution. Bentkowski’s slides from the presentation were published to slides.com, and include his research on CVE-2019-7609, along with proof-of-concept (PoC) code exploiting the vulnerability.

On October 16, Alibaba Cloud security researcher Henry Chen tweeted out the PoC from Bentkowski’s slides:

Bentkowski’s research became the basis for the exploit script published earlier this week. The exploit script is designed to identify whether or not a target version of Kibana is vulnerable. If vulnerable, the exploit script will attempt to create a reverse shell on the vulnerable host. 

The following table contains information about the vulnerable versions of Kibana based on the information in the Elastic advisory.

Kibana Versions

Status

3.0 through 5.6.14

Vulnerable

6.0.0 through 6.6.0

Vulnerable

5.6.15 

Not Vulnerable

6.6.1 and above

Not Vulnerable

A BinaryEdge search reveals more than 4,200 publicly accessible Kibana instances. The most prominent versions of Kibana are vulnerable versions, such as 6.2.4, 6.3.2 and 6.3.1.

Kibana instances

Proof of concept

As mentioned, a PoC was published in a slide deck from security researcher Michał Bentkowski and included as part of the exploit script published to GitHub. 

Solution

Administrators and users of the Elastic Stack (or ELK Stack) should upgrade to Kibana versions 5.6.15 or 6.6.1 and above. However, if upgrading is not feasible at this time, modify the kibana.yml configuration file to disable Timelion by setting timelion.enabled to false.

Identifying affected systems

A list of Tenable plugins to identify this vulnerability can be found here.

Get more information 

Join Tenable's Security Response Team on the Tenable Community.

Learn more about Tenable, the first Cyber Exposure platform for holistic management of your modern attack surface. Get a free 60-day trial of Tenable.io Vulnerability Management.

Related Articles

Cybersecurity News You Can Use

Enter your email and never miss timely alerts and security guidance from the experts at Tenable.

Tenable Vulnerability Management

Formerly Tenable.io

Enjoy full access to a modern, cloud-based vulnerability management platform that enables you to see and track all of your assets with unmatched accuracy.

Your Tenable Vulnerability Management trial also includes Tenable Lumin and Tenable Web App Scanning.

Tenable Vulnerability Management

Formerly Tenable.io

Enjoy full access to a modern, cloud-based vulnerability management platform that enables you to see and track all of your assets with unmatched accuracy. Purchase your annual subscription today.

100 assets

Choose Your Subscription Option:

Buy Now

Tenable Vulnerability Management

Formerly Tenable.io

Enjoy full access to a modern, cloud-based vulnerability management platform that enables you to see and track all of your assets with unmatched accuracy.

Your Tenable Vulnerability Management trial also includes Tenable Lumin and Tenable Web App Scanning.

Tenable Vulnerability Management

Formerly Tenable.io

Enjoy full access to a modern, cloud-based vulnerability management platform that enables you to see and track all of your assets with unmatched accuracy. Purchase your annual subscription today.

100 assets

Choose Your Subscription Option:

Buy Now

Tenable Vulnerability Management

Formerly Tenable.io

Enjoy full access to a modern, cloud-based vulnerability management platform that enables you to see and track all of your assets with unmatched accuracy.

Your Tenable Vulnerability Management trial also includes Tenable Lumin and Tenable Web App Scanning.

Tenable Vulnerability Management

Formerly Tenable.io

Enjoy full access to a modern, cloud-based vulnerability management platform that enables you to see and track all of your assets with unmatched accuracy. Purchase your annual subscription today.

100 assets

Choose Your Subscription Option:

Buy Now

Try Tenable Web App Scanning

Formerly Tenable.io Web Application Scanning

Enjoy full access to our latest web application scanning offering designed for modern applications as part of the Tenable One Exposure Management platform. Safely scan your entire online portfolio for vulnerabilities with a high degree of accuracy without heavy manual effort or disruption to critical web applications. Sign up now.

Your Tenable Web App Scanning trial also includes Tenable Vulnerability Management and Tenable Lumin.

Buy Tenable Web App Scanning

Formerly Tenable.io Web Application Scanning

Enjoy full access to a modern, cloud-based vulnerability management platform that enables you to see and track all of your assets with unmatched accuracy. Purchase your annual subscription today.

5 FQDNs

$3,578

Buy Now

Try Tenable Lumin

Visualize and explore your exposure management, track risk reduction over time and benchmark against your peers with Tenable Lumin.

Your Tenable Lumin trial also includes Tenable Vulnerability Management and Tenable Web App Scanning.

Buy Tenable Lumin

Contact a Sales Representative to see how Tenable Lumin can help you gain insight across your entire organization and manage cyber risk.

Try Tenable Nessus Professional Free

FREE FOR 7 DAYS

Tenable Nessus is the most comprehensive vulnerability scanner on the market today.

NEW - Tenable Nessus Expert
Now Available

Nessus Expert adds even more features, including external attack surface scanning, and the ability to add domains and scan cloud infrastructure. Click here to Try Nessus Expert.

Fill out the form below to continue with a Nessus Pro Trial.

Buy Tenable Nessus Professional

Tenable Nessus is the most comprehensive vulnerability scanner on the market today. Tenable Nessus Professional will help automate the vulnerability scanning process, save time in your compliance cycles and allow you to engage your IT team.

Buy a multi-year license and save. Add Advanced Support for access to phone, community and chat support 24 hours a day, 365 days a year.

Select Your License

Buy a multi-year license and save.

Add Support and Training

Try Tenable Nessus Expert Free

FREE FOR 7 DAYS

Built for the modern attack surface, Nessus Expert enables you to see more and protect your organization from vulnerabilities from IT to the cloud.

Already have Tenable Nessus Professional?
Upgrade to Nessus Expert free for 7 days.

Buy Tenable Nessus Expert

Built for the modern attack surface, Nessus Expert enables you to see more and protect your organization from vulnerabilities from IT to the cloud.

Select Your License

Buy a multi-year license and save more.

Add Support and Training