CVE-2018-3865 : What You Need to Know

The Samsung SmartThings Hub STH-ETH-250 - Firmware version 0.20.17 contains a critical buffer overflow vulnerability that can be exploited through the Samsung WifiScan handler of video-core's HTTP server.

Understanding CVE-2018-3865

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

What is CVE-2018-3865?

CVE-2018-3865 is a buffer overflow vulnerability in the Samsung SmartThings Hub STH-ETH-250 - Firmware version 0.20.17, allowing attackers to execute arbitrary code.

The Impact of CVE-2018-3865

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-2018-3865

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The vulnerability occurs when the strcpy function exceeds the size limit of the destination buffer (40 bytes), allowing an attacker to send a long value for "cameraIp" to exploit the vulnerability.

Affected Systems and Versions

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

Exploitation Mechanism

The vulnerability can be exploited through the Samsung WifiScan handler of video-core's HTTP server by sending an excessively long value for "cameraIp".

Mitigation and Prevention

It is crucial to take immediate steps to mitigate the risks posed by CVE-2018-3865.

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

Patching and Updates

Samsung may release patches or updates to address the buffer overflow vulnerability. Stay informed about security advisories and apply patches promptly.