CVE-2018-3904 : Exploit Details and Defense Strategies
Learn about CVE-2018-3904 affecting Samsung SmartThings Hub STH-ETH-250 firmware version 0.20.17. Discover the impact, technical details, and mitigation steps for this critical buffer overflow vulnerability.
The Samsung SmartThings Hub STH-ETH-250 - Firmware version 0.20.17 has a critical security flaw that allows attackers to trigger a stack buffer overflow through the camera 'update' feature.
Understanding CVE-2018-3904
This CVE involves a classic buffer overflow vulnerability in the video-core's HTTP server of the Samsung SmartThings Hub STH-ETH-250.
What is CVE-2018-3904?
The vulnerability arises from improper extraction of fields from a JSON payload, enabling user-controlled data manipulation that leads to a stack buffer overflow.
The Impact of CVE-2018-3904
- 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-2018-3904
The technical aspects of the vulnerability are crucial to understanding its implications.
Vulnerability Description
The camera 'update' feature of the video-core's HTTP server in Samsung SmartThings Hub STH-ETH-250 - Firmware version 0.20.17 is susceptible to a buffer overflow due to mishandling of user-controlled JSON data.
Affected Systems and Versions
- Affected Product: Samsung SmartThings Hub STH-ETH-250
- Affected Version: Firmware version 0.20.17
Exploitation Mechanism
Attackers can exploit this vulnerability by sending a crafted HTTP request to the device, triggering the stack buffer overflow.
Mitigation and Prevention
Protecting systems from CVE-2018-3904 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Disable the camera 'update' feature if not essential
- Implement network segmentation to limit exposure
- Monitor network traffic for any suspicious activity
Long-Term Security Practices
- Regularly update firmware and security patches
- Conduct security assessments and penetration testing
- Educate users on safe practices and awareness
Patching and Updates
- Apply the latest firmware updates provided by Samsung to address the vulnerability