CVE-2018-21200 : What You Need to Know

Some NETGEAR products are impacted by a stack-based buffer overflow that can be triggered by a user with valid credentials. This vulnerability specifically affects R7800 models prior to version 1.0.2.40 and R9000 models prior to version 1.0.3.6.

Understanding CVE-2018-21200

This CVE involves a stack-based buffer overflow vulnerability in certain NETGEAR devices that can be exploited by an authenticated user.

What is CVE-2018-21200?

The CVE-2018-21200 vulnerability is a stack-based buffer overflow issue that allows an authenticated user to trigger the overflow on specific NETGEAR routers.

The Impact of CVE-2018-21200

The impact of this vulnerability is rated as MEDIUM severity with a CVSS base score of 6.8. It has a high impact on availability, confidentiality, and integrity of the affected systems.

Technical Details of CVE-2018-21200

This section provides more technical insights into the CVE-2018-21200 vulnerability.

Vulnerability Description

The vulnerability is a stack-based buffer overflow that affects certain NETGEAR routers, including R7800 models before version 1.0.2.40 and R9000 models before version 1.0.3.6.

Affected Systems and Versions

R7800 models prior to version 1.0.2.40
R9000 models prior to version 1.0.3.6

Exploitation Mechanism

Attack Complexity: Low
Attack Vector: Adjacent Network
Privileges Required: High
User Interaction: None
Scope: Unchanged

Mitigation and Prevention

To address CVE-2018-21200, follow these mitigation and prevention strategies.

Immediate Steps to Take

Update affected NETGEAR routers to the patched versions (R7800 version 1.0.2.40 and R9000 version 1.0.3.6)
Monitor network traffic for any suspicious activities

Long-Term Security Practices

Regularly update firmware and security patches on all network devices
Implement strong password policies and user access controls

Patching and Updates

Apply the latest firmware updates provided by NETGEAR to fix the stack-based buffer overflow vulnerability