CVE-2018-3875 : What You Need to Know

The Samsung SmartThings Hub STH-ETH-250-Firmware version 0.20.17 contains a critical buffer overflow vulnerability in its video-core's HTTP server credentials handler, allowing attackers to execute arbitrary code.

Understanding CVE-2018-3875

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

What is CVE-2018-3875?

The vulnerability lies in the mishandling of certain fields extracted from a JSON payload by the video-core process, leading to a buffer overflow on the stack.

The Impact of CVE-2018-3875

The vulnerability has a CVSS base score of 9.9, indicating a critical impact. It can result in high confidentiality, integrity, and availability impacts, with low privileges required for exploitation.

Technical Details of CVE-2018-3875

The technical aspects of the vulnerability are as follows:

Vulnerability Description

The video-core's HTTP server credentials handler is susceptible to a buffer overflow.
The strncpy operation exceeds the capacity of the 2,000-byte destination buffer.

Affected Systems and Versions

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

Exploitation Mechanism

Attack Complexity: Low
Attack Vector: Network
Privileges Required: Low
User Interaction: None
Scope: Changed

Mitigation and Prevention

To address CVE-2018-3875, consider the following steps:

Immediate Steps to Take

Update the firmware to a non-vulnerable version.
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

Stay informed about security advisories from Samsung and apply patches promptly to mitigate risks.