CVE-2019-9850 : What You Need to Know

LibreOffice is commonly packaged with LibreLogo, a script for creating vector graphics using a programmable turtle. This script has the capability to run Python commands embedded within the document it is launched from. A vulnerability in the URL validation of LibreOffice was discovered, enabling malicious actors to trigger the execution of LibreLogo from script event handlers.

Understanding CVE-2019-9850

This CVE highlights an insufficient URL validation issue in LibreOffice that allows the execution of LibreLogo script, impacting versions prior to 6.2.6.

What is CVE-2019-9850?

LibreOffice's insufficient URL validation vulnerability permits the execution of LibreLogo script from script event handlers, bypassing security measures.

The Impact of CVE-2019-9850

This vulnerability could be exploited by malicious entities to execute arbitrary Python commands, posing a significant security risk to affected systems.

Technical Details of CVE-2019-9850

This section provides detailed technical insights into the vulnerability.

Vulnerability Description

The vulnerability in LibreOffice allows malicious actors to bypass security measures and execute LibreLogo script from script event handlers.

Affected Systems and Versions

Product: LibreOffice
Vendor: Document Foundation
Versions Affected: Prior to 6.2.6

Exploitation Mechanism

Malicious actors can exploit this vulnerability to execute arbitrary Python commands through LibreLogo script.

Mitigation and Prevention

Protecting systems from CVE-2019-9850 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update LibreOffice to version 6.2.6 or later to mitigate the vulnerability.
Exercise caution when opening documents from untrusted sources.

Long-Term Security Practices

Regularly update software and apply security patches promptly.
Educate users on safe document handling practices to prevent malicious script execution.

Patching and Updates

Ensure timely installation of security updates and patches to address known vulnerabilities.