CVE-2018-3873 : Security Advisory and Response

A vulnerability in the credentials handler of the video-core's HTTP server in the Samsung SmartThings Hub STH-ETH-250-Firmware version 0.20.17 allows attackers to exploit a buffer overflow, potentially leading to critical consequences.

Understanding CVE-2018-3873

This CVE involves a critical buffer overflow vulnerability in the Samsung SmartThings Hub STH-ETH-250-Firmware version 0.20.17.

What is CVE-2018-3873?

The vulnerability lies in the credentials handler of the video-core's HTTP server in the affected firmware version.
Attackers can trigger a buffer overflow by sending a long "secretKey" value, taking advantage of the limited buffer size.

The Impact of CVE-2018-3873

CVSS Base Score: 9.9 (Critical)
Attack Vector: Network
Confidentiality Impact: High
Integrity Impact: High
Availability Impact: High
Scope: Changed
Privileges Required: Low
This vulnerability poses a severe risk to the confidentiality, integrity, and availability of the affected systems.

Technical Details of CVE-2018-3873

This section delves into the technical aspects of the CVE.

Vulnerability Description

The vulnerability stems from a buffer overflow in the credentials handler of the video-core's HTTP server.

Affected Systems and Versions

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

Exploitation Mechanism

Attackers can exploit the vulnerability by overflowing the destination buffer with a long "secretKey" value.

Mitigation and Prevention

Protecting systems from CVE-2018-3873 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update the firmware to a patched version that addresses the buffer overflow vulnerability.
Monitor network traffic for any suspicious activities that could indicate an ongoing attack.

Long-Term Security Practices

Implement network segmentation to limit the impact of potential attacks.
Regularly conduct security assessments and penetration testing to identify and address vulnerabilities.

Patching and Updates

Stay informed about security updates released by Samsung for the SmartThings Hub STH-ETH-250 to patch the vulnerability.