CVE-2018-3909 : Exploit Details and Defense Strategies

The Samsung SmartThings Hub STH-ETH-250, firmware version 0.20.17, is affected by a vulnerability in the REST parser of its video-core's HTTP server, allowing attackers to exploit it through HTTP requests.

Understanding CVE-2018-3909

This CVE involves a critical vulnerability in the Samsung SmartThings Hub STH-ETH-250, firmware version 0.20.17, related to the mishandling of pipelined HTTP requests.

What is CVE-2018-3909?

An exploitable vulnerability exists in the REST parser of the video-core's HTTP server of the Samsung SmartThings Hub STH-ETH-250 - Firmware version 0.20.17. Attackers can overwrite previously parsed data by sending successive HTTP requests.

The Impact of CVE-2018-3909

CVSS Base Score: 9.1 (Critical)
Attack Vector: Network
Attack Complexity: Low
Confidentiality Impact: None
Integrity Impact: High
Availability Impact: High

Technical Details of CVE-2018-3909

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The video-core process of the Samsung SmartThings Hub STH-ETH-250 - Firmware version 0.20.17 mishandles pipelined HTTP requests, allowing attackers to overwrite previously parsed data.

Affected Systems and Versions

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

Exploitation Mechanism

Attackers exploit this vulnerability by sending successive HTTP requests, causing the video-core process to mishandle the pipelined requests.

Mitigation and Prevention

Protecting systems from CVE-2018-3909 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update the firmware to the latest version provided by the vendor.
Monitor network traffic for any suspicious HTTP requests.

Long-Term Security Practices

Implement network segmentation to isolate critical devices.
Regularly audit and patch IoT devices to address security vulnerabilities.

Patching and Updates

Apply security patches and updates released by Samsung and Talos to mitigate the vulnerability.