CVE-2018-3912 : Vulnerability Insights and Analysis

Samsung SmartThings Hub STH-ETH-250 devices with firmware version 0.20.17 are vulnerable to a stack-based buffer overflow due to insecure field extraction in the video-core process.

Understanding CVE-2018-3912

The vulnerability in the Samsung SmartThings Hub STH-ETH-250 devices poses a significant security risk, potentially allowing attackers to execute arbitrary code.

What is CVE-2018-3912?

The CVE-2018-3912 vulnerability is a classic buffer overflow issue in the video-core process of Samsung SmartThings Hub STH-ETH-250 devices running firmware version 0.20.17. The flaw arises from the insecure extraction of fields from the "shard" table in the SQLite database, leading to a stack-based buffer overflow.

The Impact of CVE-2018-3912

The vulnerability has a CVSS base score of 7.5 (High severity) and can result in a complete compromise of confidentiality, integrity, and availability of the affected system. Attackers with high privileges can exploit this flaw without user interaction.

Technical Details of CVE-2018-3912

Samsung SmartThings Hub STH-ETH-250 devices with firmware version 0.20.17 are susceptible to the following:

Vulnerability Description

Insecure extraction of fields from the "shard" table in the SQLite database
Stack-based buffer overflow triggered by a strcpy function call
Overflow of a 128-byte destination buffer due to the strcpy call

Affected Systems and Versions

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

Exploitation Mechanism

Attacker needs to send a "secretKey" value of arbitrary length to trigger the vulnerability

Mitigation and Prevention

To address CVE-2018-3912, 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 activities

Long-Term Security Practices

Regularly update all software and firmware to the latest versions
Conduct security assessments and penetration testing to identify vulnerabilities

Patching and Updates

Samsung may release patches to address the vulnerability, ensure timely application of these updates to mitigate the risk.