CVE-2021-45593 : Security Advisory and Response

Certain NETGEAR devices are affected by command injection vulnerability when exploited by an authenticated user. The vulnerability impacts various models including RBR20, RBR40, RBR50, RBS20, RBS40, RBK20, RBK40, and RBK50.

Understanding CVE-2021-45593

This CVE identifies a command injection vulnerability in specific NETGEAR devices that allows authenticated users to execute arbitrary commands.

What is CVE-2021-45593?

The CVE-2021-45593 vulnerability involves unauthorized command execution by authenticated users on affected NETGEAR devices.

The Impact of CVE-2021-45593

The vulnerability poses a high impact regarding confidentiality, integrity, and availability, with a CVSS v3.1 base score of 8.4 (High severity).

Technical Details of CVE-2021-45593

This section delves into the technical aspects of the CVE-2021-45593 vulnerability.

Vulnerability Description

The vulnerability allows an authenticated user to inject and execute arbitrary commands on affected NETGEAR devices.

Affected Systems and Versions

RBR20 before 2.7.3.22
RBR40 before 2.7.3.22
RBR50 before 2.7.2.102
RBS20 before 2.7.3.22
RBS40 before 2.7.3.22
RBK20 before 2.7.3.22
RBK40 before 2.7.3.22
RBK50 before 2.7.2.102

Exploitation Mechanism

The vulnerability can be exploited by authenticated users to execute malicious commands, potentially leading to unauthorized control of the device.

Mitigation and Prevention

Steps to address and prevent exploitation of CVE-2021-45593.

Immediate Steps to Take

Update affected devices to the latest firmware versions promptly.
Implement strong, unique passwords for device access.
Regularly monitor device behavior for any unusual activities.

Long-Term Security Practices

Enforce the principle of least privilege for device users.
Conduct security awareness training for users to recognize and report suspicious activities.

Patching and Updates

Stay informed about security advisories from NETGEAR and apply patches as soon as they are released.