CVE-2022-38955 : What You Need to Know

A firmware modification vulnerability has been identified on the Netgear WPN824EXT WiFi Range Extender, potentially allowing an attacker to insert a backdoor or conduct a denial-of-service attack.

Understanding CVE-2022-38955

This CVE details a critical vulnerability in the firmware of the Netgear WPN824EXT WiFi Range Extender, impacting devices with Firmware Version 1.1.1 to 1.1.9.

What is CVE-2022-38955?

The CVE-2022-38955 vulnerability involves a firmware modification flaw that enables a Man-in-the-Middle (MITM) attacker to alter user-uploaded firmware images, bypassing CRC checks. Successful exploitation can lead to the introduction of a backdoor in the device or cause it to become unresponsive (DoS).

The Impact of CVE-2022-38955

If exploited, this vulnerability could result in a compromised device with unauthorized access or render the device inoperable, disrupting its intended functionality.

Technical Details of CVE-2022-38955

The technical details of CVE-2022-38955 involve the vulnerability description, affected systems and versions, and the exploitation mechanism.

Vulnerability Description

The vulnerability allows attackers to manipulate firmware images during the upload process, bypassing critical checks that could compromise the device's security.

Affected Systems and Versions

Devices running Firmware Version 1.1.1 to 1.1.9 of the Netgear WPN824EXT WiFi Range Extender are vulnerable to this exploit.

Exploitation Mechanism

Attackers can leverage a Man-in-the-Middle attack to intercept and modify firmware images uploaded by users, circumventing the CRC check and potentially causing harm to the device.

Mitigation and Prevention

It is crucial to take immediate steps to secure devices and implement long-term security practices to prevent similar vulnerabilities in the future.

Immediate Steps to Take

Users should update the firmware of the Netgear WPN824EXT WiFi Range Extender to the latest version provided by the vendor. Additionally, network monitoring and access control measures should be put in place to detect and prevent unauthorized firmware modifications.

Long-Term Security Practices

Regularly monitor for security updates and patches from Netgear, follow best practices for network security, and train users to recognize and report suspicious activities on their devices.

Patching and Updates

Netgear should release patches or updates to address the firmware modification vulnerability promptly, ensuring the security and integrity of affected devices.