CVE-2019-20719 : Exploit Details and Defense Strategies

Multiple NETGEAR devices have a vulnerability that allows an authenticated user to exploit a buffer overflow.

Understanding CVE-2019-20719

This CVE identifies a buffer overflow vulnerability in various NETGEAR devices, potentially leading to unauthorized access and control.

What is CVE-2019-20719?

The CVE-2019-20719 vulnerability allows authenticated users to trigger a buffer overflow on specific NETGEAR devices, compromising their security.

The Impact of CVE-2019-20719

The vulnerability poses a medium-severity risk with high impacts on confidentiality, integrity, and availability of affected devices.

Technical Details of CVE-2019-20719

This section delves into the technical aspects of the CVE, including affected systems and exploitation mechanisms.

Vulnerability Description

The vulnerability enables authenticated users to exploit a buffer overflow on NETGEAR devices, potentially leading to unauthorized access and control.

Affected Systems and Versions

The following NETGEAR devices are affected by this vulnerability:

D6220 (versions before 1.0.0.48)
D6400 (versions before 1.0.0.82)
D7000v2 (versions before 1.0.0.52)
D8500 (versions before 1.0.3.43)
R6250 (versions before 1.0.4.34)
R6400 (versions before 1.0.1.44)
R6400v2 (versions before 1.0.2.62)
R7000P (versions before 1.4.1.30)
R7100LG (versions before 1.0.0.48)
R7300DST (versions before 1.0.0.68)
R7900 (versions before 1.0.3.8)
R7900P (versions before 1.4.1.30)
R8000 (versions before 1.0.4.28)
R8000P (versions before 1.4.1.30)
R8300 (versions before 1.0.2.128)
R8500 (versions before 1.0.2.128)

Exploitation Mechanism

The vulnerability can be exploited by authenticated users to execute a buffer overflow attack, potentially gaining unauthorized access and control.

Mitigation and Prevention

Protecting against CVE-2019-20719 involves immediate actions and long-term security practices.

Immediate Steps to Take

Update affected devices to the latest firmware versions provided by NETGEAR.
Monitor network traffic for any suspicious activities that may indicate exploitation attempts.
Restrict access to vulnerable devices to authorized personnel only.

Long-Term Security Practices

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

Patching and Updates

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