CVE-2018-21205 : What You Need to Know

An unauthenticated attacker can exploit a stack-based buffer overflow vulnerability in certain NETGEAR devices. The affected models include D7800, EX2700, R6100, R7500, R7500v2, R7800, R9000, WN2000RPTv3, WN3000RPv3, WN3100RPv2, WNDR3700v4, WNDR4300, WNDR4300v2, and WNDR4500v3.

Understanding CVE-2018-21205

Certain NETGEAR devices are susceptible to a stack-based buffer overflow vulnerability that can be exploited by an unauthenticated attacker.

What is CVE-2018-21205?

This CVE involves a stack-based buffer overflow vulnerability in specific NETGEAR devices, allowing unauthenticated attackers to exploit the issue.

The Impact of CVE-2018-21205

CVSS Score: 8.8 (High)
Attack Vector: Adjacent Network
Confidentiality Impact: High
Integrity Impact: High
Availability Impact: High
Privileges Required: None

Technical Details of CVE-2018-21205

Certain technical aspects of the CVE-2018-21205 vulnerability are as follows:

Vulnerability Description

The vulnerability involves a stack-based buffer overflow that can be triggered by an unauthenticated attacker on the affected NETGEAR devices.

Affected Systems and Versions

The following NETGEAR models are impacted by this vulnerability:

D7800 (version prior to 1.0.1.30)
EX2700 (version prior to 1.0.1.28)
R6100 (version prior to 1.0.1.20)
R7500 (version prior to 1.0.0.118)
R7500v2 (version prior to 1.0.3.24)
R7800 (version prior to 1.0.2.40)
R9000 (version prior to 1.0.2.52)
WN2000RPTv3 (version prior to 1.0.1.20)
WN3000RPv3 (version prior to 1.0.2.50)
WN3100RPv2 (version prior to 1.0.0.56)
WNDR3700v4 (version prior to 1.0.2.96)
WNDR4300 (version prior to 1.0.2.98)
WNDR4300v2 (version prior to 1.0.0.50)
WNDR4500v3 (version prior to 1.0.0.50)

Exploitation Mechanism

The vulnerability can be exploited by an unauthenticated attacker through a stack-based buffer overflow on the affected NETGEAR devices.

Mitigation and Prevention

Steps to mitigate and prevent exploitation of CVE-2018-21205:

Immediate Steps to Take

Update the firmware of the affected NETGEAR devices to the latest versions.
Implement network segmentation to limit exposure.

Long-Term Security Practices

Regularly monitor for security advisories and updates from NETGEAR.
Conduct security assessments and penetration testing on network devices.

Patching and Updates

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