CVE-2021-22965 : What You Need to Know

A vulnerability in Pulse Connect Secure before version 9.1R12.1 could allow an unauthenticated administrator to cause a denial of service when a malformed request is sent to the device.

Understanding CVE-2021-22965

This CVE refers to a vulnerability in Pulse Connect Secure that can lead to a denial of service condition.

What is CVE-2021-22965?

CVE-2021-22965 is a vulnerability in Pulse Connect Secure versions prior to 9.1R12.1 that enables an unauthenticated administrator to trigger a denial of service attack by sending a malformed request to the device.

The Impact of CVE-2021-22965

An attacker exploiting this vulnerability can disrupt the normal operation of the Pulse Connect Secure device, leading to service unavailability and potentially impacting system availability and performance.

Technical Details of CVE-2021-22965

This section outlines the specifics of the vulnerability.

Vulnerability Description

The vulnerability allows an unauthenticated attacker to cause a denial of service by sending specially crafted requests to the affected device.

Affected Systems and Versions

Pulse Connect Secure versions before 9.1R12.1 are affected by this vulnerability.

Exploitation Mechanism

An unauthenticated attacker can exploit this vulnerability by sending malformed requests to the Pulse Connect Secure device, triggering a denial of service condition.

Mitigation and Prevention

To address CVE-2021-22965 effectively, consider the following steps.

Immediate Steps to Take

Update Pulse Connect Secure to version 9.1R12.1 or later to mitigate the vulnerability.
Monitor network traffic for any unusual or malicious activity.

Long-Term Security Practices

Regularly update and patch all systems and software to prevent known vulnerabilities.
Implement access controls and authentication mechanisms to limit unauthorized access.

Patching and Updates

Stay informed about security advisories and apply vendor-supplied patches promptly.
Conduct regular security assessments and audits to identify and address potential weaknesses in the network.