CVE-2018-21114 : Exploit Details and Defense Strategies

A vulnerability in certain NETGEAR devices allows authenticated users to execute command injections, impacting various models.

Understanding CVE-2018-21114

What is CVE-2018-21114?

NETGEAR devices are susceptible to command injection by authenticated users, affecting specific models.

The Impact of CVE-2018-21114

The vulnerability poses a medium-severity risk with high impacts on confidentiality, integrity, and availability.

Technical Details of CVE-2018-21114

Vulnerability Description

The vulnerability allows authenticated users to perform command injections on affected NETGEAR devices.

Affected Systems and Versions

D7800 (version prior to 1.0.1.44)
EX6150v2 (version prior to 1.0.1.70)
EX6100v2 (version prior to 1.0.1.70)
EX6200v2 (version prior to 1.0.1.64)
EX7300 (version prior to 1.0.2.136)
EX6400 (version prior to 1.0.2.136)
R6100 (version prior to 1.0.1.16)
R7500 (version prior to 1.0.0.110)
R7800 (version prior to 1.0.2.32)
R9000 (version prior to 1.0.4.12)
WN3000RPv2 (version prior to 1.0.0.56)
WN3000RPv3 (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 attack complexity is low, requiring high privileges, and has a high impact on availability, confidentiality, and integrity.

Mitigation and Prevention

Immediate Steps to Take

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

Long-Term Security Practices

Regularly update firmware and security patches.
Implement strong authentication mechanisms.
Conduct regular security audits and assessments.

Patching and Updates

Apply patches and updates provided by NETGEAR to address the vulnerability.