CVE-2019-0007 : Vulnerability Insights and Analysis

Juniper Networks Junos OS on vMX Series is affected by a vulnerability related to predictable IP ID sequence numbers, potentially leading to various attacks. Learn about the impact, technical details, and mitigation steps.

Understanding CVE-2019-0007

This CVE involves a security issue in Juniper Networks Junos OS on vMX Series due to predictable IP ID sequence numbers.

What is CVE-2019-0007?

The vulnerability in Junos OS on vMX Series allows attackers to exploit predictable IP ID sequence numbers, making the system and connected clients vulnerable to attacks.

The Impact of CVE-2019-0007

The vulnerability has a CVSS base score of 9.3 (Critical) with a high impact on availability. However, Juniper SIRT has not detected any malicious exploitation of this issue.

Technical Details of CVE-2019-0007

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The software on vMX Series uses predictable IP ID sequence numbers, exposing the system and clients to attacks relying on this predictability.

Affected Systems and Versions

Affected Platforms: vMX Series
Affected Product: Junos OS
Affected Versions: Versions prior to 15.1F5

Exploitation Mechanism

Attack Complexity: Low
Attack Vector: Network
Availability Impact: High
Confidentiality Impact: Low
Integrity Impact: None
Privileges Required: None
User Interaction: None
Scope: Changed

Mitigation and Prevention

Protect your systems from CVE-2019-0007 with the following steps.

Immediate Steps to Take

Deny incoming packets with invalid source addresses.
Utilize egress filtering to prevent invalid/spoofed packets from leaving your network.
Enable stateful firewall filters.
Implement SYN-based anti-flood protection mechanisms.

Long-Term Security Practices

Regularly update Junos OS to the patched versions.
Conduct security assessments and testing to identify vulnerabilities.

Patching and Updates

Update to the fixed software releases, starting from version 15.1F5.