CVE-2018-21157 : Vulnerability Insights and Analysis

A number of NETGEAR devices are susceptible to command injection by an authenticated user.

Understanding CVE-2018-21157

Certain NETGEAR devices, including D7800, R6700, R6900, R7000, R7500v2, R7800, R9000, WNDR4300v2, and WNDR4500v3, are affected by a command injection vulnerability.

What is CVE-2018-21157?

This CVE identifies a security flaw in various NETGEAR devices that allows an authenticated user to execute commands through injection.

The Impact of CVE-2018-21157

The vulnerability has a CVSS base score of 6.8, indicating a medium severity issue with high impacts on confidentiality, integrity, and availability of the affected systems.

Technical Details of CVE-2018-21157

NETGEAR devices are vulnerable to command injection by authenticated users.

Vulnerability Description

The vulnerability allows authenticated users to inject and execute commands on affected NETGEAR devices.

Affected Systems and Versions

D7800 (version prior to 1.0.1.28)
R6700 (version prior to 1.0.1.44)
R6900 (version prior to 1.0.1.44)
R7000 (version prior to 1.0.9.28)
R7500v2 (version prior to 1.0.3.24)
R7800 (version prior to 1.0.2.38)
R9000 (version prior to 1.0.2.52)
WNDR4300v2 (version prior to 1.0.0.50)
WNDR4500v3 (version prior to 1.0.0.50)

Exploitation Mechanism

The vulnerability can be exploited by authenticated users to execute arbitrary commands on the affected devices.

Mitigation and Prevention

Steps to address and prevent the CVE-2018-21157 vulnerability.

Immediate Steps to Take

Update affected devices to the latest firmware versions.
Restrict network access to vulnerable devices.
Monitor network traffic for any suspicious activities.

Long-Term Security Practices

Regularly update firmware and security patches.
Implement strong authentication mechanisms.
Conduct security audits and penetration testing.

Patching and Updates

Ensure that all NETGEAR devices are running on the latest firmware versions to mitigate the command injection vulnerability.