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

LibreOffice Vulnerable to Code Execution in URL Mouseover Preview Feature

Researcher Alex Inführ discovered that LibreOffice 6.1.0-6.1.3.1 is susceptible to a code injection attack if a user hovers their mouse over a malicious URL.

Background

Researcher Alex Inführ disclosed a LibreOffice vulnerability (CVE-2018-16858) in versions 6.1.0-6.1.3.1 which shows that code injection is possible on both Linux and Windows versions when a user hovers their mouse over a malicious URL.

Update: Tenable Research was able to confirm that this vulnerability is also exploitable on macOS by editing the Proof of Concept (PoC) code.

Analysis

While this vulnerability does require user interaction, an OpenDocument Text (ODT) file containing a malicious URL is not likely to be flagged by most corporate security defenses. There isn’t any malicious code or otherwise altered elements to the document. It wouldn’t be seen as malware, and the text can be changed to the same color as the document background to make it invisible to the average user.

Furthermore, when the vulnerability is exploited, it doesn’t generate a warning dialogue of any kind. As soon as the user hovers over the malicious URL, the code is executed immediately. The current Still (Stable) Branch of LibreOffice (6.0.7) is not susceptible to this vulnerability.

Below is the researcher’s Proof of Concept video demonstrating an invisible URL opening a command prompt on the vulnerable version:

Solution

LibreOffice addressed this vulnerability in release 6.1.3.2, and upgrading to that version or later should mitigate the vulnerability.

Identifying affected systems

A list of Nessus plugins to identify this vulnerability can be found here as they're released.

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.

Subscribe to the Tenable Blog

Subscribe
Try for Free Buy Now

Try Tenable.io

FREE FOR 60 DAYS

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. Sign up now and run your first scan within 60 seconds.

Buy 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.

65 assets

$2,190.00

Buy Now

Try for Free Buy Now

Try Nessus Professional Free

FREE FOR 7 DAYS

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

Buy Nessus Professional

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

Try for Free Buy Now

Try Tenable.io Web Application Scanning

FREE FOR 60 DAYS

Enjoy full access to our latest web application scanning offering designed for modern applications as part of the Tenable.io 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 and run your first scan within 60 seconds.

Buy 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

$3,578.00

Buy Now

Try for Free Contact Sales

Try Tenable.io Container Security

FREE FOR 60 DAYS

Enjoy full access to the only container security offering integrated into a vulnerability management platform. Monitor container images for vulnerabilities, malware and policy violations. Integrate with continuous integration and continuous deployment (CI/CD) systems to support DevOps practices, strengthen security and support enterprise policy compliance.

Buy Tenable.io Container Security

Tenable.io Container Security seamlessly and securely enables DevOps processes by providing visibility into the security of container images – including vulnerabilities, malware and policy violations – through integration with the build process.

Learn More about Industrial Security

Get a Demo of Tenable.sc

Please fill out the form below with your contact information and a sales representative will contact you shortly to schedule a demo. You may also include a short comment (limited to 255 characters). Please note that fields with asterisks (*) are mandatory.