CVE-2019-20683 : Security Advisory and Response

An unauthenticated attacker can exploit a stack-based buffer overflow vulnerability in certain models of NETGEAR devices.

Understanding CVE-2019-20683

What is CVE-2019-20683?

CVE-2019-20683 is a vulnerability that allows an unauthenticated attacker to perform a stack-based buffer overflow on specific NETGEAR devices.

The Impact of CVE-2019-20683

This vulnerability has a CVSS base score of 8.8, indicating a high severity level with significant impacts on confidentiality, integrity, and availability.

Technical Details of CVE-2019-20683

Vulnerability Description

The vulnerability arises from a stack-based buffer overflow in certain NETGEAR devices, including models like D3600, D6000, D6200, D7000, and others.

Affected Systems and Versions

D3600 (version before 1.0.0.76)
D6000 (version before 1.0.0.76)
D6200 (version before 1.1.00.32)
D7000 (version before 1.0.1.68)
JR6150 (version before 1.0.1.18)
PR2000 (version before 1.0.0.28)
R6020 (version before 1.0.0.38)
R6050 (version before 1.0.1.18)
R6080 (version before 1.0.0.38)
R6120 (version before 1.0.0.46)
R6220 (version before 1.1.0.80)
R6260 (version before 1.1.0.40)
R6700v2 (version before 1.2.0.36)
R6800 (version before 1.2.0.36)
R6900v2 (version before 1.2.0.36)
WNR2020 (version before 1.1.0.62)
XR500 (version before 2.3.2.32)

Exploitation Mechanism

The vulnerability can be exploited by an unauthenticated attacker through a stack-based buffer overflow, potentially leading to unauthorized access and control of the affected devices.

Mitigation and Prevention

Immediate Steps to Take

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

Long-Term Security Practices

Regularly update and patch all network devices and systems.
Conduct security assessments and penetration testing to identify and address vulnerabilities.

Patching and Updates

Apply security patches provided by NETGEAR for the affected devices to mitigate the vulnerability.