CVE-2018-0059 : Exploit Details and Defense Strategies

ScreenOS has a persistent cross-site scripting vulnerability that could allow an authenticated remote user to inject web script or HTML, potentially leading to data theft and unauthorized administrative actions.

Understanding CVE-2018-0059

ScreenOS: Stored Cross-Site Scripting (XSS) vulnerability

What is CVE-2018-0059?

A persistent cross-site scripting vulnerability in ScreenOS allows an authenticated remote user to inject malicious scripts or HTML into a web administration session.

The Impact of CVE-2018-0059

Exploitation could result in the theft of sensitive data and credentials.
It may mislead subsequent administrative users into unintended actions on the affected device.

Technical Details of CVE-2018-0059

Vulnerability Description

The vulnerability exists in Juniper Networks ScreenOS 6.3.0 versions before 6.3.0r26, enabling unauthorized script injection.

Affected Systems and Versions

Product: ScreenOS
Vendor: Juniper Networks
Versions Affected: ScreenOS 6.3.0 before 6.3.0r26

Exploitation Mechanism

Attack Complexity: Low
Attack Vector: Network
Privileges Required: Low
User Interaction: Required

Mitigation and Prevention

Immediate Steps to Take

Update to ScreenOS 6.3.0r26 or later releases.
Clear any stored cross-site scripting entries.
Use access lists or firewall filters to restrict device access to trusted hosts.

Long-Term Security Practices

Limit access to critical infrastructure networking equipment to trusted administrative networks.
Disable the web administrative interface if not essential.

Patching and Updates

Ensure all software releases are up to date to address the vulnerability.