CVE-2021-33600 : What You Need to Know

A denial-of-service (DoS) vulnerability was discovered in the web user interface of F-Secure Internet Gatekeeper, allowing an unauthenticated attacker to trigger assertion via a malformed HTTP packet and lead to a denial-of-service of the product.

Understanding CVE-2021-33600

This section provides an overview of the CVE-2021-33600 vulnerability.

What is CVE-2021-33600?

The CVE-2021-33600 is a denial-of-service (DoS) vulnerability found in the web user interface of F-Secure Internet Gatekeeper, affecting all versions in the 5 Series.

The Impact of CVE-2021-33600

The impact of CVE-2021-33600 includes a medium severity base score of 5.4. An unauthenticated attacker exploiting this vulnerability could cause a denial-of-service of the affected product.

Technical Details of CVE-2021-33600

This section delves into the technical specifics of CVE-2021-33600.

Vulnerability Description

The vulnerability arises due to an attacker's ability to trigger assertion via a malformed HTTP packet to the web interface, allowing a denial-of-service attack.

Affected Systems and Versions

The F-Secure Internet Gatekeeper 5 Series, all versions, are impacted by this vulnerability.

Exploitation Mechanism

An unauthenticated attacker can exploit this vulnerability by sending a large username parameter, causing a denial-of-service of the product.

Mitigation and Prevention

Explore the measures to mitigate the CVE-2021-33600 vulnerability.

Immediate Steps to Take

Users are advised to apply Hotfix 9, which will be released for fixing this vulnerability. Detailed instructions for the fix are available on the F-Secure website.

Long-Term Security Practices

In addition to applying immediate fixes, organizations are recommended to implement robust cybersecurity practices and stay updated with security advisories.

Patching and Updates

Regularly check for security patches and updates provided by F-Secure to address vulnerabilities and enhance the security posture of the affected systems.