CVE-2021-34415 : What You Need to Know

Zoom On-Premise Meeting Connector Controller before version 4.6.358.20210205 is affected by a vulnerability leading to uncontrolled resource consumption and system crash.

Understanding CVE-2021-34415

This CVE identifies a flaw in the Zone Controller service of Zoom On-Premise Meeting Connector Controller, impacting versions before 4.6.358.20210205.

What is CVE-2021-34415?

The vulnerability in Zoom On-Premise Meeting Connector Controller allows attackers to exploit the cnt field in network packets, resulting in resource depletion and potential system instability.

The Impact of CVE-2021-34415

Exploiting this vulnerability can cause a denial of service (DoS) condition, leading to the crashing of the system, disrupting normal operations.

Technical Details of CVE-2021-34415

The technical details of this CVE include the vulnerability description, affected systems and versions, and exploitation mechanism.

Vulnerability Description

The Zone Controller service fails to validate the cnt field in incoming network packets, enabling attackers to exhaust system resources.

Affected Systems and Versions

Zoom On-Premise Meeting Connector Controller versions prior to 4.6.358.20210205 are susceptible to this vulnerability.

Exploitation Mechanism

By sending crafted network packets with malicious cnt values, threat actors can trigger resource depletion, leading to a system crash.

Mitigation and Prevention

To safeguard systems from CVE-2021-34415, users can take immediate steps and implement long-term security practices.

Immediate Steps to Take

Update Zoom On-Premise Meeting Connector Controller to version 4.6.358.20210205 or higher.
Monitor network traffic for any suspicious activity.

Long-Term Security Practices

Conduct regular security audits to identify vulnerabilities proactively.
Educate employees on cybersecurity best practices and response protocols.

Patching and Updates

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