CVE-2018-21193 : Security Advisory and Response

NETGEAR devices are vulnerable to a stack-based buffer overflow when accessed by an authenticated user. This CVE affects various router models.

Understanding CVE-2018-21193

This CVE identifies a critical vulnerability in NETGEAR routers that allows a stack-based buffer overflow when an authenticated user accesses the device.

What is CVE-2018-21193?

The vulnerability in NETGEAR devices can be exploited by an authenticated user, potentially leading to a stack-based buffer overflow.

The Impact of CVE-2018-21193

The vulnerability has a CVSS base score of 6.8, indicating a medium severity issue with high impacts on confidentiality, integrity, and availability of the affected systems.

Technical Details of CVE-2018-21193

NETGEAR devices are susceptible to a stack-based buffer overflow when accessed by authenticated users.

Vulnerability Description

The vulnerability allows an authenticated user to trigger a stack-based buffer overflow on various NETGEAR router models.

Affected Systems and Versions

D6100 (version prior to 1.0.0.57)
D7800 (version prior to 1.0.1.34)
R6100 (version prior to 1.0.1.20)
R7500 (version prior to 1.0.0.122)
R7500v2 (version prior to 1.0.3.24)
R7800 (version prior to 1.0.2.40)
WNDR3700v4 (version prior to 1.0.2.92)
WNDR4300 (version prior to 1.0.2.94)
WNDR4300v2 (version prior to 1.0.0.50)
WNDR4500v3 (version prior to 1.0.0.50)
WNR2000v5 (version prior to 1.0.0.62)

Exploitation Mechanism

The vulnerability can be exploited by an authenticated user to execute a stack-based buffer overflow attack on the affected NETGEAR devices.

Mitigation and Prevention

Steps to address and prevent the CVE-2018-21193 vulnerability.

Immediate Steps to Take

Update affected devices to the latest firmware versions provided by NETGEAR.
Restrict network access to authorized users only.
Monitor network traffic for any suspicious activities.

Long-Term Security Practices

Regularly update firmware and security patches on NETGEAR devices.
Implement strong authentication mechanisms and access controls.

Patching and Updates

Apply patches and updates released by NETGEAR promptly to mitigate the vulnerability.