CVE-2019-20735 : What You Need to Know

NETGEAR devices are affected by a stack-based buffer overflow vulnerability that can be exploited by authenticated users. This CVE impacts various router models.

Understanding CVE-2019-20735

This CVE identifies a critical vulnerability in multiple NETGEAR router models that could allow an authenticated user to execute arbitrary code.

What is CVE-2019-20735?

The CVE-2019-20735 vulnerability is a stack-based buffer overflow issue found in several NETGEAR devices, potentially leading to unauthorized code execution.

The Impact of CVE-2019-20735

The vulnerability has a CVSS base score of 6.8, indicating a medium severity level. It poses a high risk to confidentiality, integrity, and availability of the affected systems.

Technical Details of CVE-2019-20735

This section provides detailed technical information about the CVE.

Vulnerability Description

The vulnerability allows authenticated users to trigger a stack-based buffer overflow, enabling them to execute malicious code on the affected devices.

Affected Systems and Versions

The following NETGEAR router models are impacted by CVE-2019-20735:

D3600 (versions before 1.0.0.75)
D6000 (versions before V1.0.0.75)
D6100 (versions before V1.0.0.63)
R7800 (versions before v1.0.2.52)
R8900 (versions before v1.0.4.2)
R9000 (versions before v1.0.4.2)
RBK50 (versions before v2.3.0.32)
RBR50 (versions before v2.3.0.32)
RBS50 (versions before v2.3.0.32)
WNDR3700v4 (versions before V1.0.2.102)
WNDR4300v1 (versions before V1.0.2.104)
WNDR4300v2 (versions before v1.0.0.58)
WNDR4500v3 (versions before v1.0.0.58)
WNR2000v5 (versions before v1.0.0.68)
XR500 (versions before V2.3.2.32)

Exploitation Mechanism

The vulnerability can be exploited by authenticated users to overflow the stack and potentially execute arbitrary code on the affected NETGEAR devices.

Mitigation and Prevention

Protecting systems from CVE-2019-20735 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update the firmware of affected devices to the latest patched versions provided by NETGEAR.
Restrict network access to vulnerable devices and only allow trusted users to authenticate.

Long-Term Security Practices

Regularly monitor for security advisories and updates from NETGEAR.
Implement strong password policies and multi-factor authentication to enhance device security.

Patching and Updates

NETGEAR has released patches addressing the CVE-2019-20735 vulnerability. Ensure all affected devices are updated with the latest firmware to mitigate the risk of exploitation.