CVE-2019-0066 Explained : Impact and Mitigation

A weakness has been discovered in the Next-Generation Multicast VPN (NG-mVPN) service of Juniper Networks Junos OS, allowing an attacker to initiate a Denial of Service (DoS) attack by sending a specific malformed IPv4 packet.

Understanding CVE-2019-0066

This CVE involves a vulnerability in Juniper Networks Junos OS that can disrupt the routing protocol daemon (rpd) process through a malformed IPv4 packet.

What is CVE-2019-0066?

This vulnerability in Junos OS allows attackers to trigger a DoS attack by sending a specially crafted IPv4 packet to a device running BGP, potentially causing a sustained DoS situation.

The Impact of CVE-2019-0066

CVSS Base Score: 7.5 (High)
Attack Vector: Network
Availability Impact: High
Attack Complexity: Low
Privileges Required: None
Scope: Unchanged
Vector String: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Technical Details of CVE-2019-0066

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The vulnerability affects Juniper Networks Junos OS versions prior to specific releases, allowing attackers to disrupt the rpd process.

Affected Systems and Versions

Junos OS 15.1 versions prior to 15.1F6-S12, 15.1R7-S2
Junos OS 15.1X49 versions prior to 15.1X49-D150 on SRX Series
Junos OS 15.1X53 versions prior to various releases
Junos OS 16.1 versions prior to specific releases
Junos OS 16.2 versions prior to specific releases
Junos OS 17.1 versions prior to specific releases
Junos OS 17.2 versions prior to specific releases
Junos OS 17.3 versions prior to specific releases

Exploitation Mechanism

Attackers can exploit this vulnerability by sending a malformed IPv4 packet to devices running BGP, potentially causing a DoS condition.

Mitigation and Prevention

Learn how to mitigate and prevent the CVE-2019-0066 vulnerability.

Immediate Steps to Take

Update Junos OS to the patched versions mentioned in the solution section.

Long-Term Security Practices

Regularly update and patch Junos OS to prevent known vulnerabilities.

Patching and Updates

Install the software releases provided in the solution section to address this specific issue.