CVE-2018-3918 : Security Advisory and Response

A vulnerability in Samsung SmartThings Hub STH-ETH-250 - Firmware version 0.20.17 allows attackers to delete cameras remotely.

Understanding CVE-2018-3918

This CVE involves a vulnerability in the remote servers of Samsung SmartThings Hub STH-ETH-250 - Firmware version 0.20.17.

What is CVE-2018-3918?

An attacker can exploit a flaw in the SmartThings Hub's remote servers, causing unintended deletion of cameras by mishandling camera IDs during a specific operation.

The Impact of CVE-2018-3918

CVSS Base Score: 6.5 (Medium Severity)
Attack Vector: Network
Attack Complexity: High
Availability Impact: High
Integrity Impact: Low
Privileges Required: None
User Interaction: None

Technical Details of CVE-2018-3918

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The hubCore process on port 39500 forwards unauthenticated messages to SmartThings' servers, which mishandle camera IDs during the 'sync' operation, leading to camera deletion.

Affected Systems and Versions

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

Exploitation Mechanism

An attacker can trigger the vulnerability by sending a crafted HTTP request to the remote servers.

Mitigation and Prevention

Protect your systems from CVE-2018-3918 with the following steps:

Immediate Steps to Take

Update the firmware to the latest version provided by Samsung.
Monitor network traffic for any suspicious activity.
Restrict access to the SmartThings Hub to trusted users only.

Long-Term Security Practices

Regularly audit and update firmware on IoT devices.
Implement network segmentation to isolate IoT devices from critical systems.

Patching and Updates

Stay informed about security updates from Samsung and apply patches promptly.