CVE-2019-0054 : Exploit Details and Defense Strategies

A vulnerability related to the validation of certificates in the SRX Series Application Identification (app-id) signature update client of Juniper Networks Junos OS has been discovered, potentially allowing attackers to conduct Man-in-the-Middle (MitM) attacks.

Understanding CVE-2019-0054

This CVE affects Juniper Networks Junos OS 15.1X49 versions earlier than 15.1X49-D120 on SRX Series devices.

What is CVE-2019-0054?

The vulnerability allows for the compromise of confidentiality and integrity through MitM attacks during app-id signature updates.

The Impact of CVE-2019-0054

Attack Complexity: High
Attack Vector: Network
Base Score: 6.8 (Medium)
Confidentiality Impact: High
Integrity Impact: High
User Interaction: Required
Privileges Required: None
Scope: Unchanged
Exploitation could lead to MitM attacks compromising device security.

Technical Details of CVE-2019-0054

This section provides detailed technical information about the vulnerability.

Vulnerability Description

Improper Certificate Validation in SRX Series Application Identification

Affected Systems and Versions

Platforms: SRX Series
Product: Junos OS
Vendor: Juniper Networks
Affected Version: 15.1X49-D120 and below

Exploitation Mechanism

Attackers can exploit the vulnerability to conduct MitM attacks during app-id signature updates.

Mitigation and Prevention

Steps to address and prevent exploitation of CVE-2019-0054.

Immediate Steps to Take

Update to software releases 15.1X49-D120 or later.
Implement the minimum required configuration: services application-identification.
Set the command for affected releases: set services application-identification download secure-download.

Long-Term Security Practices

Regularly update Junos OS to the latest versions.
Monitor for security advisories from Juniper Networks.

Patching and Updates

Ensure all devices are running Junos OS 15.1X49-D120 or higher to mitigate the vulnerability.