CVE-2021-3384 : Exploit Details and Defense Strategies
Learn about CVE-2021-3384, a vulnerability in Stormshield Network Security impacting multiple versions. Find out the impact, affected systems, and mitigation steps here.
A vulnerability in Stormshield Network Security has been identified that could allow an attacker to trigger issues related to ARP/NDP tables management, leading to a temporary inability for the system to contact new hosts via IPv4 or IPv6. This vulnerability impacts multiple versions of the software but has been addressed in subsequent updates.
Understanding CVE-2021-3384
This section delves into the details surrounding CVE-2021-3384.
What is CVE-2021-3384?
The vulnerability in Stormshield Network Security enables attackers to exploit weaknesses in ARP/NDP tables management, causing disruptions in the system's communication with new hosts over IPv4 or IPv6.
The Impact of CVE-2021-3384
The vulnerability can result in a temporary halt in the system's ability to reach out to new hosts on both IPv4 and IPv6 networks. This can potentially lead to network communication issues and disruptions in connectivity.
Technical Details of CVE-2021-3384
This section covers the technical aspects of CVE-2021-3384.
Vulnerability Description
The vulnerability allows threat actors to manipulate ARP/NDP tables management, affecting the system's ability to establish connections with new hosts via IPv4 or IPv6, causing disruptions in network access.
Affected Systems and Versions
Versions 2.0.0 to 2.7.7, 2.8.0 to 2.16.0, 3.0.0 to 3.7.16, 3.8.0 to 3.11.4, and 4.0.0 to 4.1.5 of Stormshield Network Security are impacted by this vulnerability.
Exploitation Mechanism
Attackers can exploit this vulnerability by triggering protection related to ARP/NDP tables management, which temporarily obstructs the system's ability to reach new hosts through IPv4 or IPv6.
Mitigation and Prevention
This section outlines the steps to mitigate and prevent the exploitation of CVE-2021-3384.
Immediate Steps to Take
Users are advised to update their Stormshield Network Security software to the fixed versions: 2.7.8, 3.7.17, 3.11.5, and 4.2.0 to prevent exploitation of this vulnerability.
Long-Term Security Practices
Implement network security best practices, regularly update software, and monitor network traffic to enhance overall security and detect any suspicious activities.
Patching and Updates
Staying up-to-date with software patches and security updates is crucial in safeguarding systems against known vulnerabilities and ensuring a secure computing environment.