CVE-2018-0017 : Vulnerability Insights and Analysis

A vulnerability in the NAT-PT feature of Junos OS on SRX series devices can lead to a denial of service situation due to crashes in the flowd daemon.

Understanding CVE-2018-0017

This CVE involves a denial of service vulnerability affecting Junos OS on SRX series devices.

What is CVE-2018-0017?

The issue arises in the NAT-PT feature of Junos OS on SRX series devices, causing the flowd daemon to crash when receiving a specific valid IPv6 packet. This repeated crashing can result in a prolonged denial of service scenario for the affected SRX device.

The Impact of CVE-2018-0017

CVSS Base Score: 7.5 (High)
Attack Vector: Network
Availability Impact: High
Attack Complexity: Low
Privileges Required: None
Scope: Unchanged
User Interaction: None
Confidentiality Impact: None
Integrity Impact: None
The vulnerability does not require user interaction and can be exploited remotely with low complexity, leading to a high impact on availability.

Technical Details of CVE-2018-0017

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The vulnerability in the NAT-PT feature of Junos OS on SRX series devices allows a specific valid IPv6 packet to crash the flowd daemon, potentially causing a denial of service condition.

Affected Systems and Versions

The following versions of Junos OS on SRX series devices are affected:

Junos OS 12.1X46 versions prior to 12.1X46-D72
Junos OS 12.3X48 versions prior to 12.3X48-D55
Junos OS 15.1X49 versions prior to 15.1X49-D90

Exploitation Mechanism

Juniper SIRT has not detected any malicious exploitation of this vulnerability.

Mitigation and Prevention

Learn how to mitigate and prevent the CVE-2018-0017 vulnerability.

Immediate Steps to Take

Apply the following updated software releases to address the issue: 12.1X46-D76 (pending release), 12.3X48-D55, 15.1X49-D90, 17.3R1, and all subsequent releases.

Long-Term Security Practices

Regularly monitor for security advisories and updates from Juniper Networks.
Implement network segmentation and access controls to limit exposure to potential threats.
Conduct regular security assessments and penetration testing to identify and address vulnerabilities.

Patching and Updates

Ensure timely installation of software updates and patches provided by Juniper Networks to mitigate known vulnerabilities.