CVE-2018-21172 : Vulnerability Insights and Analysis

An issue has been identified in certain NETGEAR devices where an authenticated user can exploit a stack-based buffer overflow. This vulnerability affects models such as R7800, R9000, WNDR3700v4, WNDR4300, WNDR4300v2, WNDR4500v3, and WNR2000v5.

Understanding CVE-2018-21172

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

What is CVE-2018-21172?

CVE-2018-21172 is a security vulnerability found in NETGEAR routers that enables an authenticated attacker to trigger a stack-based buffer overflow.

The Impact of CVE-2018-21172

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-2018-21172

This section provides more in-depth technical insights into the CVE-2018-21172 vulnerability.

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

The following NETGEAR router models are impacted by this vulnerability:

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 unauthorized code execution.

Mitigation and Prevention

To address CVE-2018-21172 and enhance the security of NETGEAR devices, the following steps are recommended:

Immediate Steps to Take

Update the firmware of affected devices to the latest patched versions.
Implement strong password policies and ensure secure authentication practices.
Monitor network traffic for any suspicious activities.

Long-Term Security Practices

Regularly update firmware and security patches for all network devices.
Conduct security audits and penetration testing to identify and address vulnerabilities.
Educate users on best security practices and awareness of potential threats.

Patching and Updates

NETGEAR has released patches for the affected router models. It is crucial to promptly apply these updates to mitigate the CVE-2018-21172 vulnerability.