CVE-2018-5453 : Security Advisory and Response

The Moxa OnCell G3100-HSPA Series version 1.4 Build 16062919 and earlier versions contain a vulnerability that allows attackers to manipulate HTTP requests, rendering the device inaccessible.

Understanding CVE-2018-5453

This CVE involves an improper handling of length parameter inconsistency in the Moxa OnCell G3100-HSPA Series.

What is CVE-2018-5453?

This CVE identifies a flaw in the Moxa OnCell G3100-HSPA Series that permits unauthorized modification of specific components in HTTP requests, resulting in device unavailability.

The Impact of CVE-2018-5453

The vulnerability allows malicious actors to disrupt device accessibility by exploiting HTTP request manipulation.

Technical Details of CVE-2018-5453

The following technical aspects provide insight into the CVE.

Vulnerability Description

The issue arises from mishandling length parameter inconsistencies in the affected Moxa OnCell G3100-HSPA Series versions.

Affected Systems and Versions

Product: Moxa OnCell G3100-HSPA Series
Versions: 1.4 Build 16062919 and earlier

Exploitation Mechanism

Attackers can exploit the vulnerability by altering specific elements within HTTP requests, leading to device inaccessibility.

Mitigation and Prevention

Protecting systems from CVE-2018-5453 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply vendor-provided patches promptly
Implement network segmentation to limit attack surfaces
Monitor network traffic for suspicious activities

Long-Term Security Practices

Regularly update and patch all system components
Conduct security audits and penetration testing
Educate users on safe browsing habits and security best practices

Patching and Updates

Install the latest firmware updates from Moxa to address the vulnerability