CVE-2023-28965 : What You Need to Know

This CVE involves an improper check or handling of exceptional conditions in the storm control feature of Juniper Networks Junos OS, which could allow an attacker to launch a Denial of Service (DoS) attack by sending a high rate of traffic. The vulnerability affects Juniper Networks Junos OS on QFX10002 devices.

Understanding CVE-2023-28965

This section explores the details of the CVE-2023-28965 vulnerability, its impact, technical aspects, and mitigation strategies.

What is CVE-2023-28965?

The vulnerability in the storm control feature of Junos OS allows an attacker to cause a Denial of Service by sending a high rate of traffic. If the level of incoming traffic exceeds the specified level, the switch will drop packets for the controlled traffic types, leading to a sustained DoS condition.

The Impact of CVE-2023-28965

The impact of this vulnerability is a Denial of Service (DoS) attack, where continued receipt and processing of high-rate packets can result in a sustained DoS condition. This can disrupt network operations and lead to service unavailability.

Technical Details of CVE-2023-28965

In this section, we delve into the technical aspects of the CVE-2023-28965 vulnerability, including its description, affected systems, and exploitation mechanism.

Vulnerability Description

The vulnerability arises from an improper check or handling of exceptional conditions within the storm control feature of Juniper Networks Junos OS, allowing attackers to trigger a DoS by sending a high rate of traffic.

Affected Systems and Versions

The affected systems include Juniper Networks Junos OS on QFX10002 devices. Versions affected are:

19.3R3-S7 and prior
19.4 versions prior to 19.4R3-S11
20.2 versions earlier than 20.2R3-S6
20.4 versions prior to 20.4R3-S5
21.1 versions before 21.1R3-S4
21.2 versions earlier than 21.2R3-S3
21.3 versions prior to 21.3R3
21.4 versions before 21.4R2

Exploitation Mechanism

The vulnerability can be exploited by an attacker sending a high rate of traffic to trigger the storm control feature, causing the switch to drop packets for controlled traffic types and leading to a DoS condition.

Mitigation and Prevention

Mitigating CVE-2023-28965 involves taking immediate steps, implementing long-term security practices, and applying necessary patches and updates.

Immediate Steps to Take

As there are no known workarounds for this issue, users are advised to update their software to the patched versions provided by Juniper Networks.

Long-Term Security Practices

To enhance security posture, it is recommended to regularly update and patch the Junos OS to address known vulnerabilities and ensure the network infrastructure's resilience against potential threats.

Patching and Updates

Juniper Networks has released software updates to address this specific vulnerability. Affected users should update their Junos OS to versions 19.3R3-S7, 19.4R3-S11, 20.2R3-S6, 20.4R3-S5, 21.1R3-S4, 21.2R3-S3, 21.3R3, 21.4R2, 22.1R1, or any subsequent releases provided by the vendor.