CVE-2018-21190 : What You Need to Know

An authenticated user can exploit a stack-based buffer overflow vulnerability in certain NETGEAR devices. The affected models are D6100 versions prior to 1.0.0.57, D7800 versions prior to 1.0.1.34, R6100 versions prior to 1.0.1.20, R7500 versions prior to 1.0.0.122, R7800 versions prior to 1.0.2.40, R9000 versions prior to 1.0.2.52, WNDR3700v4 versions prior to 1.0.2.92, WNDR4300 versions prior to 1.0.2.94, WNDR4300v2 versions prior to 1.0.0.50, WNDR4500v3 versions prior to 1.0.0.50, and WNR2000v5 versions prior to 1.0.0

Understanding CVE-2018-21190

This CVE involves a stack-based buffer overflow vulnerability in specific NETGEAR devices, potentially allowing an authenticated user to execute arbitrary code.

What is CVE-2018-21190?

CVE-2018-21190 is a security vulnerability that enables an authenticated user to trigger a stack-based buffer overflow in certain NETGEAR devices.

The Impact of CVE-2018-21190

The vulnerability has a CVSS base score of 6.8, indicating a medium severity issue. The impact includes high confidentiality, integrity, and availability impacts, with high privileges required for exploitation.

Technical Details of CVE-2018-21190

This section provides more in-depth technical information about the CVE.

Vulnerability Description

The vulnerability allows an authenticated user to exploit a stack-based buffer overflow in NETGEAR devices, potentially leading to arbitrary code execution.

Affected Systems and Versions

D6100 versions prior to 1.0.0.57
D7800 versions prior to 1.0.1.34
R6100 versions prior to 1.0.1.20
R7500 versions prior to 1.0.0.122
R7800 versions prior to 1.0.2.40
R9000 versions prior to 1.0.2.52
WNDR3700v4 versions prior to 1.0.2.92
WNDR4300 versions prior to 1.0.2.94
WNDR4300v2 versions prior to 1.0.0.50
WNDR4500v3 versions prior to 1.0.0.50
WNR2000v5 versions prior to 1.0.0.62

Exploitation Mechanism

The vulnerability can be exploited by an authenticated user to trigger a stack-based buffer overflow, potentially leading to the execution of arbitrary code on the affected devices.

Mitigation and Prevention

Protecting systems from CVE-2018-21190 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update affected NETGEAR devices to the latest firmware versions that contain patches for the vulnerability.
Monitor network traffic for any signs of exploitation.

Long-Term Security Practices

Regularly update and patch all network devices to prevent known vulnerabilities.
Implement strong authentication mechanisms to limit access to critical systems.

Patching and Updates

NETGEAR has released patches for the affected devices. Ensure timely application of these patches to mitigate the risk of exploitation.