CVE-2018-21195 : What You Need to Know

Certain models of NETGEAR devices are susceptible to a stack-based buffer overflow when used by an authenticated user. This vulnerability affects various models and firmware versions.

Understanding CVE-2018-21195

This CVE involves a stack-based buffer overflow vulnerability in certain NETGEAR devices, potentially allowing an authenticated user to exploit the issue.

What is CVE-2018-21195?

The vulnerability in CVE-2018-21195 allows an authenticated user to trigger a stack-based buffer overflow on specific NETGEAR device models.

The Impact of CVE-2018-21195

CVSS Base Score: 6.8 (Medium Severity)
Attack Vector: Adjacent Network
Attack Complexity: Low
Privileges Required: High
Confidentiality Impact: High
Integrity Impact: High
Availability Impact: High
Scope: Unchanged
User Interaction: None

Technical Details of CVE-2018-21195

This section provides detailed technical information about the CVE-2018-21195 vulnerability.

Vulnerability Description

The vulnerability is a stack-based buffer overflow in certain NETGEAR devices, allowing an authenticated user to potentially execute arbitrary code.

Affected Systems and Versions

The following NETGEAR device models and firmware versions are affected:

D6100 (prior to 1.0.0.57)
D7800 (prior to 1.0.1.34)
R6100 (prior to 1.0.1.20)
R7500v2 (prior to 1.0.3.24)
R7800 (prior to 1.0.2.40)
R9000 (prior to 1.0.3.6)
WNDR3700v4 (prior to 1.0.2.92)
WNDR4300 (prior to 1.0.2.94)
WNDR4300v2 (prior to 1.0.0.50)
WNDR4500v3 (prior to 1.0.0.50)
WNR2000v5 (prior to 1.0.0.62)

Exploitation Mechanism

The vulnerability can be exploited by an authenticated user to execute malicious code through a stack-based buffer overflow.

Mitigation and Prevention

Protecting systems from CVE-2018-21195 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update affected devices to the latest firmware versions provided by NETGEAR.
Implement strong authentication mechanisms to prevent unauthorized access.
Monitor network traffic for any suspicious activities.

Long-Term Security Practices

Regularly update firmware and security patches on all network devices.
Conduct security audits and penetration testing to identify and address vulnerabilities.

Patching and Updates

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