CVE-2018-3905 : What You Need to Know

Samsung SmartThings Hub STH-ETH-250 with Firmware version 0.20.17 is vulnerable to a buffer overflow in the camera "create" feature.

Understanding CVE-2018-3905

This CVE involves a critical vulnerability in Samsung SmartThings Hub STH-ETH-250 devices that can be exploited for a buffer overflow attack.

What is CVE-2018-3905?

The vulnerability lies in the video-core's HTTP server of the affected devices, specifically in the handling of the "state" field extracted from a JSON payload, allowing attackers to trigger a buffer overflow by sending a crafted HTTP request.

The Impact of CVE-2018-3905

The vulnerability has a CVSS base score of 8.5 (High) with significant impacts on confidentiality, integrity, and availability. It poses a serious security risk as it can be exploited remotely without user interaction.

Technical Details of CVE-2018-3905

Samsung SmartThings Hub STH-ETH-250 with Firmware version 0.20.17 is susceptible to the following:

Vulnerability Description

The camera "create" feature of the device's video-core's HTTP server is the source of the buffer overflow vulnerability.

Affected Systems and Versions

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

Exploitation Mechanism

Attack Complexity: High
Attack Vector: Network
Privileges Required: Low
Scope: Changed
Exploitation can lead to a buffer overflow on the stack by manipulating the "state" field in a JSON payload.

Mitigation and Prevention

To address CVE-2018-3905, consider the following steps:

Immediate Steps to Take

Update the firmware of the SmartThings Hub to a patched version.
Implement network segmentation to limit exposure.
Monitor network traffic for any suspicious activity.

Long-Term Security Practices

Regularly update all IoT devices to the latest firmware.
Conduct security assessments and penetration testing on IoT devices.

Patching and Updates

Samsung may release patches to address the vulnerability; ensure timely installation of these updates.