CVE-2019-20747 : Vulnerability Insights and Analysis

An authenticated user can exploit a stack-based buffer overflow vulnerability in specific models of NETGEAR devices.

Understanding CVE-2019-20747

What is CVE-2019-20747?

Certain NETGEAR devices are affected by a stack-based buffer overflow vulnerability that can be exploited by an authenticated user. The impacted models include D6100, D7800, R7500v2, R7800, R8900, R9000, RAX120, RBK20, RBR20, RBS20, RBK50, RBR50, RBS50, RBK40, RBS40, SRK60, SRR60, SRS60, WNDR3700v4, WNDR4300, WNDR4300v2, WNDR4500v3, and WNR2000v5.

The Impact of CVE-2019-20747

This vulnerability has a CVSS base score of 6.8, indicating a medium severity level. The attack complexity is low, with high impacts on confidentiality, integrity, and availability. High privileges are required for exploitation, and user interaction is not needed.

Technical Details of CVE-2019-20747

Vulnerability Description

An authenticated user can trigger a stack-based buffer overflow in specific NETGEAR device models.

Affected Systems and Versions

Models affected include D6100, D7800, R7500v2, R7800, R8900, R9000, RAX120, RBK20, RBR20, RBS20, RBK50, RBR50, RBS50, RBK40, RBS40, SRK60, SRR60, SRS60, WNDR3700v4, WNDR4300, WNDR4300v2, WNDR4500v3, and WNR2000v5.

Exploitation Mechanism

Attackers with high privileges can exploit this vulnerability over an adjacent network without user interaction.

Mitigation and Prevention

Immediate Steps to Take

Update affected devices to the patched versions provided by NETGEAR.
Monitor for any unauthorized access or unusual activities on the network.

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 patched versions for the affected models to address this vulnerability.