CVE-2019-20737 : Vulnerability Insights and Analysis

A stack-based buffer overflow vulnerability has been discovered in certain NETGEAR devices, allowing unauthenticated attackers to exploit the issue.

Understanding CVE-2019-20737

This CVE identifies a critical security vulnerability affecting various NETGEAR devices due to a stack-based buffer overflow.

What is CVE-2019-20737?

The vulnerability allows attackers to execute arbitrary code without authentication on the affected NETGEAR devices.

The Impact of CVE-2019-20737

CVSS Score: 5.6 (Medium Severity)
Attack Vector: Local
Confidentiality Impact: High
Privileges Required: High
Availability Impact: Low
Integrity Impact: Low
Scope: Unchanged
User Interaction: None

Technical Details of CVE-2019-20737

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The vulnerability is a stack-based buffer overflow in certain NETGEAR devices, enabling attackers to execute malicious code without authentication.

Affected Systems and Versions

The following NETGEAR devices and firmware versions are impacted:

D6220 (before 1.0.0.44)
D6400 (before 1.0.0.78)
D7000v2 (before 1.0.0.51)
D8500 (before 1.0.3.42)
DGN2200v4 (before 1.0.0.106)
DGND2200Bv4 (before 1.0.0.106)
and more (refer to the provided description for the full list).

Exploitation Mechanism

Attackers can exploit this vulnerability by sending specially crafted packets to the affected devices, triggering the buffer overflow.

Mitigation and Prevention

Protect your systems from CVE-2019-20737 by following these steps:

Immediate Steps to Take

Update the firmware of affected NETGEAR devices to the latest patched versions.
Implement network segmentation to limit the impact of potential attacks.
Monitor network traffic for any suspicious activity.

Long-Term Security Practices

Regularly update firmware and security patches on all network devices.
Conduct security audits and penetration testing to identify and address vulnerabilities.

Patching and Updates

NETGEAR has released patches for the affected devices. Ensure timely installation of these updates to mitigate the vulnerability.