CVE-2018-3895 : What You Need to Know
Learn about CVE-2018-3895, a critical buffer overflow vulnerability in Samsung SmartThings Hub STH-ETH-250 Firmware version 0.20.17, impacting confidentiality, integrity, and availability. Find mitigation steps and long-term security practices here.
A buffer overflow vulnerability has been identified in the /cameras/XXXX/clips handler of the video-core HTTP server for Samsung SmartThings Hub STH-ETH-250 Firmware version 0.20.17, allowing attackers to exploit the system.
Understanding CVE-2018-3895
This CVE involves a critical buffer overflow vulnerability in Samsung SmartThings Hub STH-ETH-250 Firmware version 0.20.17.
What is CVE-2018-3895?
The vulnerability arises from a strncpy call that exceeds the allocated buffer space, triggered by an attacker sending a specific 'endTime' value in an HTTP request.
The Impact of CVE-2018-3895
The vulnerability has a CVSS base score of 9.9, indicating a critical severity level with high impacts on confidentiality, integrity, and availability of the system.
Technical Details of CVE-2018-3895
This section delves into the technical aspects of the CVE.
Vulnerability Description
- The buffer overflow occurs in the /cameras/XXXX/clips handler of the video-core HTTP server.
- The strncpy call surpasses the 52-byte limit of the destination buffer.
Affected Systems and Versions
- Product: Samsung SmartThings Hub STH-ETH-250
- Firmware Version: 0.20.17
Exploitation Mechanism
- Attack Complexity: Low
- Attack Vector: Network
- Privileges Required: Low
- User Interaction: None
- Scope: Changed
- The attacker can exploit the vulnerability by sending a crafted 'endTime' value in an HTTP request.
Mitigation and Prevention
Protecting systems from CVE-2018-3895 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Apply security patches provided by Samsung promptly.
- Monitor network traffic for any suspicious activities.
- Implement network segmentation to limit the impact of potential attacks.
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 as soon as they are released.