CVE-2021-33603 : Security Advisory and Response
Learn about CVE-2021-33603, a Denial-of-Service vulnerability in F-Secure Atlant impacting various F-Secure security products. Find out the impact, technical details, and mitigation steps.
A Denial-of-Service (DoS) vulnerability has been discovered in F-Secure Atlant, affecting various F-Secure endpoint protection products. An attacker can remotely trigger a crash in the AVPACK module component, leading to a Denial-of-Service condition on the Anti-Virus engine.
Understanding CVE-2021-33603
This section delves into the specifics of the Denial-of-Service vulnerability discovered in F-Secure Atlant.
What is CVE-2021-33603?
CVE-2021-33603 is a Denial-of-Service (DoS) vulnerability found in F-Secure Atlant, allowing attackers to remotely crash the AVPACK module component, resulting in a DoS on the Anti-Virus engine.
The Impact of CVE-2021-33603
The successful exploitation of this vulnerability can lead to the Denial-of-Service condition, impacting the availability of the affected F-Secure products.
Technical Details of CVE-2021-33603
In this section, we will explore the technical aspects of the CVE-2021-33603 vulnerability.
Vulnerability Description
The vulnerability allows remote attackers to trigger a crash in the AVPACK module component, causing the affected F-Secure products to experience a Denial-of-Service scenario.
Affected Systems and Versions
F-Secure endpoint protection products on Windows and Mac, F-Secure Linux Security, F-Secure Atlant, F-Secure Cloud Protection for Salesforce, and Cloud Protection for Microsoft Office 365 are impacted.
Exploitation Mechanism
Attackers can exploit this vulnerability remotely by leveraging fuzzed files to trigger a crash in the AVPACK module component.
Mitigation and Prevention
This section provides guidance on mitigating and preventing the exploitation of CVE-2021-33603.
Immediate Steps to Take
No user action is required as F-Secure has released a fix through an automatic update channel with the Capricorn update on 2021-09-29_03.
Long-Term Security Practices
Ensure that systems are regularly updated with the latest security patches and follow best security practices to prevent similar vulnerabilities in the future.
Patching and Updates
Stay informed about security advisories from F-Secure and apply patches promptly to secure the affected products.