CVE-2018-21227 : Vulnerability Insights and Analysis

A vulnerability known as command injection affects certain NETGEAR devices when accessed by an authenticated user. This CVE impacts various router models with specific firmware versions.

Understanding CVE-2018-21227

This CVE identifies a security flaw in NETGEAR routers that allows authenticated users to execute arbitrary commands, potentially leading to unauthorized access and control of the device.

What is CVE-2018-21227?

The vulnerability in CVE-2018-21227, also known as command injection, enables attackers to run commands on affected NETGEAR routers by exploiting weaknesses in the device's authentication process.

The Impact of CVE-2018-21227

The vulnerability poses a medium-severity risk with a CVSS base score of 6.8. It can result in high impacts on confidentiality, integrity, and availability of the affected devices, requiring high privileges for exploitation.

Technical Details of CVE-2018-21227

This section delves into the specific technical aspects of the CVE.

Vulnerability Description

The vulnerability allows authenticated users to inject and execute arbitrary commands on NETGEAR routers, compromising their security and potentially leading to unauthorized access.

Affected Systems and Versions

The following NETGEAR router models are impacted by this vulnerability:

D7800 (version before 1.0.1.34)
R6400v2 (version before 1.0.2.34)
R6700 (version before 1.0.1.30)
R6900 (version before 1.0.1.30)
R6900P (version before 1.0.0.62)
R7000 (version before 1.0.9.12)
R7000P (version before 1.0.0.62)
R7500v2 (version before 1.0.3.26)
R7800 (version before 1.0.2.42)
R9000 (version before 1.0.3.10)
WNDR4300v2 (version before 1.0.0.50)
WNDR4500v3 (version before 1.0.0.50)

Exploitation Mechanism

The vulnerability can be exploited by authenticated users to execute malicious commands on the affected NETGEAR routers, potentially leading to unauthorized access and control.

Mitigation and Prevention

Protecting against CVE-2018-21227 involves immediate actions and long-term security practices.

Immediate Steps to Take

Update the firmware of affected NETGEAR routers to the latest versions that address the command injection vulnerability.
Monitor network traffic for any suspicious activities that may indicate exploitation of the vulnerability.

Long-Term Security Practices

Regularly update router firmware to patch known vulnerabilities and enhance security measures.
Implement strong authentication mechanisms and access controls to prevent unauthorized access to network devices.

Patching and Updates

NETGEAR has released firmware updates to address the command injection vulnerability in the affected router models. It is crucial to promptly apply these patches to mitigate the risk of exploitation.