CVE-2020-1687 : Vulnerability Insights and Analysis

This CVE involves Juniper Networks EX4300-MP Series, EX4600 Series, and QFX5K Series running Junos OS. The vulnerability causes high CPU load in EVPN-VXLAN deployments due to specific layer 2 frames.

Understanding CVE-2020-1687

This vulnerability affects Juniper Networks devices configured in EVPN-VXLAN where receipt of specific VXLAN encapsulated layer 2 frames can lead to high CPU load and potential network protocol issues.

What is CVE-2020-1687?

The vulnerability in Junos OS on designated platforms can cause network disruption due to CPU overload from specific incoming layer 2 frames.

The Impact of CVE-2020-1687

The issue affects network operation and may result in traffic interruption for devices configured as EVPN-VXLAN gateways.

Technical Details of CVE-2020-1687

This section dives into the specifics of the vulnerability.

Vulnerability Description

Specific VXLAN encapsulated layer 2 frames trigger high CPU usage, impacting network protocol operations.

Affected Systems and Versions

Devices running Junos OS versions prior to specified releases on the affected platforms (EX4300-MP Series, EX4600 Series, QFX5K Series) are vulnerable.

Exploitation Mechanism

The vulnerability can be exploited by sending malicious VXLAN encapsulated layer 2 frames, causing CPU overload.

Mitigation and Prevention

Understanding how to address and prevent the vulnerability.

Immediate Steps to Take

Apply the provided software releases to fix the issue

Long-Term Security Practices

Regularly update Junos OS to prevent vulnerabilities
Monitor network traffic for unusual patterns

Patching and Updates

Juniper has released updated versions of Junos OS to mitigate the vulnerability.