CVE-2018-21147 : Vulnerability Insights and Analysis

An authenticated user can exploit a stack-based buffer overflow vulnerability in certain NETGEAR devices. This vulnerability impacts various models including D7800, R7500v2, R7800, R8900, R9000, WNDR4300v2, and WNDR4500v3.

Understanding CVE-2018-21147

This CVE involves a stack-based buffer overflow vulnerability in specific NETGEAR devices.

What is CVE-2018-21147?

An authenticated user can trigger a stack-based buffer overflow in certain NETGEAR devices.
Affected models include D7800, R7500v2, R7800, R8900, R9000, WNDR4300v2, and WNDR4500v3.

The Impact of CVE-2018-21147

CVSS Score: 6.8 (Medium Severity)
Attack Complexity: Low
Attack Vector: Adjacent Network
Availability Impact: High
Confidentiality Impact: High
Integrity Impact: High
Privileges Required: High
User Interaction: None

Technical Details of CVE-2018-21147

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The vulnerability is a stack-based buffer overflow in certain NETGEAR devices.

Affected Systems and Versions

Models affected include D7800 (before 1.0.1.34), R7500v2 (before 1.0.3.26), R7800 (before 1.0.2.42), R8900 (before 1.0.3.10), R9000 (before 1.0.3.10), WNDR4300v2 (before 1.0.0.54), and WNDR4500v3 (before 1.0.0.54).

Exploitation Mechanism

An authenticated user can exploit the vulnerability by triggering a stack-based buffer overflow.

Mitigation and Prevention

Protecting systems from CVE-2018-21147 is crucial to maintaining security.

Immediate Steps to Take

Update affected devices to the patched versions provided by NETGEAR.
Monitor network traffic for any signs of exploitation.

Long-Term Security Practices

Regularly update firmware and software to prevent vulnerabilities.
Implement strong authentication mechanisms to limit unauthorized access.

Patching and Updates

Apply security patches and updates released by NETGEAR to address the vulnerability.