CVE-2019-20766 Explained : Impact and Mitigation

Devices with NETGEAR R7800 firmware versions prior to 1.0.2.52 are vulnerable to a stack-based buffer overflow that can be exploited by an authenticated user.

Understanding CVE-2019-20766

NETGEAR R7800 devices are affected by a stack-based buffer overflow vulnerability that poses a medium severity risk.

What is CVE-2019-20766?

CVE-2019-20766 is a vulnerability found in NETGEAR R7800 devices before firmware version 1.0.2.52. It allows an authenticated user to trigger a stack-based buffer overflow.

The Impact of CVE-2019-20766

The vulnerability has a CVSS v3.0 base score of 6.8 (Medium severity) with high impacts on confidentiality, integrity, and availability. The attack complexity is low, and privileges are required for exploitation.

Technical Details of CVE-2019-20766

NETGEAR R7800 devices are susceptible to a stack-based buffer overflow.

Vulnerability Description

An authenticated user can exploit the vulnerability in devices running firmware versions prior to 1.0.2.52, leading to a stack-based buffer overflow.

Affected Systems and Versions

Product: NETGEAR R7800
Versions Affected: Firmware versions before 1.0.2.52

Exploitation Mechanism

The vulnerability can be exploited by an authenticated user to trigger a stack-based buffer overflow on the affected devices.

Mitigation and Prevention

Steps to address and prevent the CVE-2019-20766 vulnerability.

Immediate Steps to Take

Update the firmware to version 1.0.2.52 or later to mitigate the vulnerability.
Monitor network traffic for any signs of exploitation.

Long-Term Security Practices

Regularly update firmware and security patches on all network devices.
Implement strong authentication mechanisms and access controls.

Patching and Updates

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