CVE-2020-1680 : What You Need to Know

This CVE-2020-1680 article provides detailed information about a vulnerability affecting Juniper Networks MX Series using Junos OS, potentially leading to a Denial of Service (DoS) condition.

Understanding CVE-2020-1680

The vulnerability specifically impacts MX Series routers operating Junos OS versions prior to specific releases due to processing malformed IPv6 packets in NAT64 configuration.

What is CVE-2020-1680?

CVE-2020-1680 is a vulnerability found in Juniper Networks MX Series devices that can cause the MS-MPC/MIC to crash when handling incorrectly formed IPv6 packets in NAT64 setups.

The Impact of CVE-2020-1680

The vulnerability may lead to repeated crashes of the MS-PIC component, causing a prolonged Denial of Service situation, accessible by unauthenticated attackers leveraging crafted IPv6 packets.

Technical Details of CVE-2020-1680

This section covers the technical aspects of the vulnerability.

Vulnerability Description

A flaw in the NAT64 configuration processing might trigger a crash of MS-MPC or MS-MIC on affected devices when handling malformed IPv6 packets.

Affected Systems and Versions

Platforms: MX Series
Product: Junos OS
Affected Versions: Versions of 15.1 to 19.3, with specific release details mentioned in the CVE data.

Exploitation Mechanism

Attack Complexity: Low
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Low
Vector String: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Mitigation and Prevention

Understand the steps to mitigate and prevent exploitation.

Immediate Steps to Take

Upgrade affected devices to the patched Junos OS versions specified in the solutions section.

Long-Term Security Practices

Regularly monitor for security advisories from Juniper Networks.

Patching and Updates

Ensure timely application of security patches provided by the vendor to prevent exploitation of known vulnerabilities.