CVE-2023-27217 : Vulnerability Insights and Analysis

This CVE record details a stack-based buffer overflow vulnerability in the ChangeFriendlyName() function of Belkin Smart Outlet V2 F7c063 firmware_2.00.11420.OWRT.PVT_SNSV2. The vulnerability allows attackers to trigger a Denial of Service (DoS) by sending a specially crafted UPnP request.

Understanding CVE-2023-27217

This section will provide an insight into the nature and impact of CVE-2023-27217.

What is CVE-2023-27217?

CVE-2023-27217 is a stack-based buffer overflow vulnerability found in the ChangeFriendlyName() function of Belkin Smart Outlet V2 F7c063 firmware_2.00.11420.OWRT.PVT_SNSV2. This flaw can be exploited by attackers to launch a Denial of Service (DoS) attack, causing the affected device to become unresponsive.

The Impact of CVE-2023-27217

The impact of this vulnerability is significant as it can lead to a complete shutdown of the Belkin Smart Outlet V2 device, disrupting its normal operations. Attackers could potentially exploit this flaw to disrupt services or cause inconvenience to users relying on this smart device.

Technical Details of CVE-2023-27217

In this section, we will delve into the technical aspects of CVE-2023-27217, including the vulnerability description, affected systems, and the exploitation mechanism.

Vulnerability Description

The vulnerability arises due to a stack-based buffer overflow in the ChangeFriendlyName() function of the affected Belkin Smart Outlet V2 firmware version. This allows an attacker to overwrite the buffer beyond its allocated memory, leading to a DoS condition.

Affected Systems and Versions

The issue affects Belkin Smart Outlet V2 devices running firmware version 2.00.11420.OWRT.PVT_SNSV2. Devices with this specific configuration are vulnerable to exploitation.

Exploitation Mechanism

Attackers can exploit this vulnerability by sending a specially crafted UPnP request to the targeted device, triggering the buffer overflow condition in the ChangeFriendlyName() function. This can result in the device becoming unresponsive, causing a Denial of Service.

Mitigation and Prevention

To mitigate the risks associated with CVE-2023-27217, it is crucial to implement immediate steps, adopt long-term security practices, and apply relevant patches and updates.

Immediate Steps to Take

Disable UPnP functionality on the Belkin Smart Outlet V2 device to reduce the attack surface.
Implement network segmentation and access controls to limit unauthorized access to the device.
Monitor network traffic for any suspicious UPnP requests that could indicate an ongoing attack.

Long-Term Security Practices

Regularly update the firmware of the Belkin Smart Outlet V2 device to patch known vulnerabilities and improve security.
Conduct security assessments and penetration testing to identify and address any potential weaknesses in the network and connected devices.
Educate users on best security practices, such as avoiding opening links or attachments from unknown sources.

Patching and Updates

Stay informed about security advisories from Belkin regarding CVE-2023-27217 and apply any patches or updates released by the manufacturer promptly. Regularly check for firmware updates and ensure that the device is running the latest secure version to mitigate risks associated with known vulnerabilities.