CVE-2020-1672 : Vulnerability Insights and Analysis

On Juniper Networks Junos OS devices configured with DHCPv6 relay enabled, receipt of a specific DHCPv6 packet might crash the jdhcpd daemon, leading to a Denial of Service (DoS) condition.

Understanding CVE-2020-1672

The vulnerability affects various versions of Junos OS, potentially allowing for a DoS attack.

What is CVE-2020-1672?

This CVE involves a vulnerability in Juniper Networks Junos OS's handling of DHCPv6 packets, which could lead to a crash of the jdhcpd daemon, causing a DoS condition.

The Impact of CVE-2020-1672

Attack Vector: Network
Base Score: 7.5 (High)
Availability Impact: High
Attack Complexity: Low

Technical Details of CVE-2020-1672

The following details provide a deeper understanding of the vulnerability.

Vulnerability Description

A specific DHCPv6 packet can crash the jdhcpd daemon, affecting various Junos OS versions.

Affected Systems and Versions

Junos OS versions 17.3 to 20.1 are impacted by this vulnerability.

Exploitation Mechanism

No known malicious exploitation has been reported by Juniper SIRT.

Mitigation and Prevention

Protect your systems by following these steps:

Immediate Steps to Take

Apply the provided software updates for Junos OS versions as mentioned in the solution section.

Long-Term Security Practices

Regularly update Junos OS to the latest versions to avoid known vulnerabilities.

Patching and Updates

Update to the recommended Junos OS releases to fix this issue.