CVE-2020-27603 : Security Advisory and Response

BigBlueButton before 2.2.27 has an unsafe JODConverter setting that allows LibreOffice document conversions to access external files.

Understanding CVE-2020-27603

BigBlueButton is affected by a vulnerability that could potentially lead to unauthorized access to external files during document conversions.

What is CVE-2020-27603?

This CVE refers to a security issue in BigBlueButton versions prior to 2.2.27, where the JODConverter setting can be exploited to access external files during LibreOffice document conversions.

The Impact of CVE-2020-27603

The vulnerability could result in unauthorized access to sensitive external files, potentially leading to data leakage or manipulation.

Technical Details of CVE-2020-27603

BigBlueButton's vulnerability has the following technical details:

Vulnerability Description

The unsafe JODConverter setting in BigBlueButton allows for external file access during LibreOffice document conversions.

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Versions affected: Not applicable

Exploitation Mechanism

The vulnerability can be exploited by manipulating the JODConverter setting to gain access to external files during document conversions.

Mitigation and Prevention

To address CVE-2020-27603, consider the following steps:

Immediate Steps to Take

Upgrade BigBlueButton to version 2.2.27 or later to mitigate the vulnerability.
Restrict access to the JODConverter setting to trusted entities only.

Long-Term Security Practices

Regularly update and patch BigBlueButton to ensure the latest security fixes are in place.
Conduct security assessments and audits to identify and address any potential vulnerabilities.

Patching and Updates

Ensure timely installation of security patches and updates provided by BigBlueButton to prevent exploitation of known vulnerabilities.