CVE-2018-3916 Explained : Impact and Mitigation

A vulnerability exists in the Samsung SmartThings Hub STH-ETH-250 - Firmware version 0.20.17 that allows for a stack-based buffer overflow, potentially leading to exploitation by attackers.

Understanding CVE-2018-3916

This CVE involves a critical vulnerability in the Samsung SmartThings Hub STH-ETH-250 - Firmware version 0.20.17, posing a significant risk to affected systems.

What is CVE-2018-3916?

The vulnerability in the Samsung SmartThings Hub STH-ETH-250 - Firmware version 0.20.17 enables attackers to trigger a stack-based buffer overflow by sending a specially crafted HTTP request.

The Impact of CVE-2018-3916

The vulnerability has a CVSS base score of 7.5 (High), with severe impacts on confidentiality, integrity, and availability of the affected system.

Technical Details of CVE-2018-3916

This section delves into the technical aspects of the CVE.

Vulnerability Description

The issue arises from a stack-based buffer overflow in the video-core HTTP server of the Samsung SmartThings Hub STH-ETH-250 - Firmware version 0.20.17, caused by the strcpy function exceeding the buffer size limit.

Affected Systems and Versions

Product: Samsung SmartThings Hub STH-ETH-250
Vendor: Samsung
Firmware Version: 0.20.17

Exploitation Mechanism

Attack Complexity: High
Attack Vector: Local
Privileges Required: High
Scope: Changed
Exploitation involves sending a 'directory' value of any length through an HTTP request.

Mitigation and Prevention

Protecting systems from CVE-2018-3916 is crucial to prevent potential exploitation.

Immediate Steps to Take

Update the firmware to a patched version provided by Samsung.
Implement network segmentation to limit access to vulnerable devices.
Monitor network traffic for any suspicious activity.

Long-Term Security Practices

Regularly update all software and firmware to address security vulnerabilities.
Conduct security assessments and penetration testing to identify and remediate weaknesses.

Patching and Updates

Stay informed about security advisories from Samsung and apply patches promptly to mitigate risks.