CVE-2022-41963 : Security Advisory and Response
CVE-2022-41963: BigBlueButton versions prior to 2.4.3 have a vulnerability allowing attackers to exploit improper whiteboard permissions. Learn about the impact and mitigation.
BigBlueButton contains Improper Preservation of Permissions for whiteboard.
Understanding CVE-2022-41963
This CVE identifies an issue in BigBlueButton, an open-source web conferencing system, where versions prior to 2.4.3 have an improper preservation of permissions for the whiteboard feature that could be exploited by attackers.
What is CVE-2022-41963?
BigBlueButton versions before 2.4.3 have a vulnerability that allows attackers, who are meeting participants, to take actions during a whiteboard grace period after their access is revoked. This issue is fixed in version 2.4.3 and version 2.5-alpha-1.
The Impact of CVE-2022-41963
The impact of this CVE is rated as low severity with a CVSS base score of 2.7. While the attack complexity is low, attackers with high privileges required can exploit this vulnerability. The confidentiality impact is none, the integrity impact is low, and the availability impact is none.
Technical Details of CVE-2022-41963
This section provides more insights into the vulnerability, affected systems, and how it can be exploited.
Vulnerability Description
The vulnerability in BigBlueButton allows meeting participants to perform actions on the whiteboard even after their access rights have been revoked during a short grace period.
Affected Systems and Versions
BigBlueButton versions before 2.4.3 are affected by this vulnerability.
Exploitation Mechanism
Attackers, who are meeting participants, can exploit this vulnerability to disrupt or manipulate a session by taking actions on the whiteboard during the grace period after their access is revoked.
Mitigation and Prevention
To mitigate the risks associated with CVE-2022-41963, it is essential to take immediate and long-term security measures.
Immediate Steps to Take
Immediately update your BigBlueButton installation to version 2.4.3 or newer to address this vulnerability.
Long-Term Security Practices
Regularly update your software and keep track of security advisories. Implement access controls and monitor participant activities during sessions.
Patching and Updates
Ensure timely application of patches and updates released by BigBlueButton to stay protected against known vulnerabilities.