CVE-2018-3902 : Vulnerability Insights and Analysis

Samsung SmartThings Hub STH-ETH-250 with firmware version 0.20.17 is vulnerable to a critical buffer overflow issue in the camera "replace" feature.

Understanding CVE-2018-3902

This CVE involves a buffer overflow vulnerability in Samsung SmartThings Hub STH-ETH-250 devices with specific firmware.

What is CVE-2018-3902?

The vulnerability lies in the video-core's HTTP server of the affected devices, triggered by inaccurately extracting the URL field from a JSON payload, leading to a stack-based buffer overflow.

The Impact of CVE-2018-3902

CVSS Base Score: 9.9 (Critical)
Attack Vector: Network
Attack Complexity: Low
Privileges Required: Low
User Interaction: None
Confidentiality Impact: High
Integrity Impact: High
Availability Impact: High
Scope: Changed

Technical Details of CVE-2018-3902

The technical aspects of the vulnerability provide insight into its nature and potential exploitation.

Vulnerability Description

The buffer overflow vulnerability occurs in the camera "replace" feature of Samsung SmartThings Hub STH-ETH-250 devices with firmware version 0.20.17.

Affected Systems and Versions

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

Exploitation Mechanism

The vulnerability is exploited by sending a crafted HTTP request to the video-core's HTTP server, triggering the buffer overflow.

Mitigation and Prevention

Protecting systems from CVE-2018-3902 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply security patches provided by Samsung promptly.
Implement network segmentation to limit exposure.
Monitor network traffic for any suspicious activity.

Long-Term Security Practices

Regularly update firmware and software to patch known vulnerabilities.
Conduct security assessments and penetration testing to identify weaknesses.

Patching and Updates

Stay informed about security advisories from Samsung.
Follow best practices for secure coding and input validation to prevent buffer overflows.