CVE-2018-3914 : Exploit Details and Defense Strategies
Learn about CVE-2018-3914, a stack-based buffer overflow vulnerability in Samsung SmartThings Hub STH-ETH-250 - Firmware version 0.20.17, impacting confidentiality, integrity, and availability. Find mitigation steps and patching recommendations here.
A vulnerability in the video-core HTTP server of the Samsung SmartThings Hub STH-ETH-250 - Firmware version 0.20.17 allows for a stack-based buffer overflow, potentially leading to a high impact on confidentiality, integrity, and availability.
Understanding CVE-2018-3914
This CVE involves a classic buffer overflow vulnerability in the Samsung SmartThings Hub STH-ETH-250.
What is CVE-2018-3914?
This vulnerability arises from a stack-based buffer overflow in the retrieval of database fields in the video-core HTTP server of the Samsung SmartThings Hub STH-ETH-250 - Firmware version 0.20.17. The issue occurs due to the strcpy function copying data into a buffer limited to 2000 bytes, allowing an attacker to exploit it by sending a "sessionToken" value of any length.
The Impact of CVE-2018-3914
The vulnerability has a CVSS base score of 7.5, indicating a high severity level with significant impacts on confidentiality, integrity, and availability. The attack complexity is high, requiring local access and high privileges.
Technical Details of CVE-2018-3914
This section provides more in-depth technical insights into the CVE.
Vulnerability Description
The vulnerability is a stack-based buffer overflow in the video-core HTTP server of the Samsung SmartThings Hub STH-ETH-250 - Firmware version 0.20.17, triggered by the strcpy function copying data into a limited buffer size.
Affected Systems and Versions
- Product: SmartThings Hub STH-ETH-250
- Vendor: Samsung
- Firmware Version: 0.20.17
Exploitation Mechanism
The buffer overflow occurs when an attacker sends a "sessionToken" value of any length, exploiting the strcpy function's limitation.
Mitigation and Prevention
To address CVE-2018-3914, follow these mitigation strategies.
Immediate Steps to Take
- Update the firmware to a patched version that addresses the buffer overflow vulnerability.
- Monitor network traffic for any suspicious activities that could indicate an exploit attempt.
Long-Term Security Practices
- Implement network segmentation to limit the impact of potential attacks.
- Regularly review and update security configurations to prevent similar vulnerabilities.
Patching and Updates
Apply security patches provided by Samsung to fix the buffer overflow vulnerability in the SmartThings Hub STH-ETH-250 - Firmware version 0.20.17.