CVE-2021-40122 : Vulnerability Insights and Analysis

This article provides details about a vulnerability in Cisco Meeting Server that could lead to a denial of service (DoS) attack.

Understanding CVE-2021-40122

This section will cover the key aspects of the CVE-2021-40122 vulnerability.

What is CVE-2021-40122?

CVE-2021-40122 is a vulnerability in the API of the Call Bridge feature of Cisco Meeting Server that could allow an unauthenticated, remote attacker to trigger a DoS condition.

The Impact of CVE-2021-40122

The vulnerability in Cisco Meeting Server could result in a DoS condition, caused by improper handling of message requests, potentially leading to device reloads and call drops.

Technical Details of CVE-2021-40122

In this section, we will delve into the technical specifics of CVE-2021-40122.

Vulnerability Description

The vulnerability is due to the incorrect processing of large series of messages in the Call Bridge feature of Cisco Meeting Server.

Affected Systems and Versions

Affected Product: Cisco Meeting Server
Vendor: Cisco
Affected Version: n/a

Exploitation Mechanism

Attackers can exploit this vulnerability by sending a series of messages to the vulnerable API, causing the affected device to reload and leading to a DoS condition.

Mitigation and Prevention

Learn about the steps to mitigate and prevent exploitation of CVE-2021-40122.

Immediate Steps to Take

Apply vendor-supplied patches as soon as they are available.
Monitor network traffic for any unusual activity.
Implement firewall rules to limit access to vulnerable APIs.

Long-Term Security Practices

Regularly update and patch the Cisco Meeting Server software.
Conduct security assessments to identify and remediate vulnerabilities.

Patching and Updates

Keep track of security advisories from Cisco and promptly apply any patches or updates released.