CVE-2022-28754 : Exploit Details and Defense Strategies

Zoom On-Premise Deployments: Improper Access Control Vulnerability

Understanding CVE-2022-28754

This CVE impacts Zoom On-Premise Meeting Connector MMR versions earlier than 4.8.129.20220714, allowing a malicious actor to exploit an improper access control vulnerability.

What is CVE-2022-28754?

Zoom On-Premise Meeting Connector MMR before version 4.8.129.20220714 is plagued by an improper access control flaw. It enables unauthorized individuals to secretly join meetings, self-admit from waiting rooms, assume the host role, and disrupt meetings without being detected by other participants.

The Impact of CVE-2022-28754

The vulnerability scores a high base severity of 7.1 CVSSv3.1 base score due to its low attack complexity, high integrity impact, and low confidentiality impact. Although no availability impact is noted, the flaw requires minimal privileges and no user interaction, posing a significant threat to affected systems.

Technical Details of CVE-2022-28754

The following technical aspects summarize the vulnerability in detail:

Vulnerability Description

The flaw in Zoom On-Premise Meeting Connector MMR versions prior to 4.8.129.20220714 allows malicious actors to bypass access controls and disrupt meetings without detection.

Affected Systems and Versions

Zoom On-Premise Meeting Connector MMR versions less than 4.8.129.20220714 are vulnerable to this exploit.

Exploitation Mechanism

By exploiting this vulnerability, unauthorized individuals can stealthily join meetings, admit themselves from waiting rooms, and potentially become hosts to disrupt ongoing meetings.

Mitigation and Prevention

To address this vulnerability and enhance system security, consider the following measures:

Immediate Steps to Take

Upgrade Zoom On-Premise Meeting Connector MMR to version 4.8.129.20220714 or higher to mitigate the access control flaw.
Monitor meetings for any unauthorized participants or disruptive behavior.

Long-Term Security Practices

Conduct regular security assessments and audits to identify and address potential vulnerabilities.
Educate users on secure meeting practices and encourage reporting of suspicious activities.

Patching and Updates

Stay informed about security bulletins and updates from Zoom to promptly apply patches and address security vulnerabilities.