CVE-2021-45528 : Security Advisory and Response

Certain NETGEAR devices are affected by a buffer overflow vulnerability that allows an authenticated user to execute arbitrary code. This vulnerability impacts various router models before specific firmware versions.

Understanding CVE-2021-45528

Certain NETGEAR routers are susceptible to a buffer overflow vulnerability that requires authentication for exploitation.

What is CVE-2021-45528?

A buffer overflow vulnerability in certain NETGEAR routers allows authenticated users to trigger malicious code execution. Affected models include R6300v2, R6400, R6900, R7000, R7900, R8000, and others.

The Impact of CVE-2021-45528

CVSS Base Score: 8.1 (High)
Attack Vector: Local
Attack Complexity: Low
Privileges Required: High
Confidentiality Impact: Low
Integrity Impact: High
Scope: Changed
User Interaction: None

Technical Details of CVE-2021-45528

Certain specifics regarding the vulnerability.

Vulnerability Description

The vulnerability involves a buffer overflow in NETGEAR routers, enabling a logged-in user to execute arbitrary commands.

Affected Systems and Versions

R6300v2 before 1.0.4.52
R6400 before 1.0.1.52
R6900 before 1.0.2.8
R7000 before 1.0.9.88
R7900 before 1.0.3.18
R8000 before 1.0.4.46
R7900P before 1.4.1.50
R8000P before 1.4.1.50
RAX75 before 1.0.3.88
RAX80 before 1.0.3.88
WNR3500Lv2 before 1.2.0.62

Exploitation Mechanism

An authenticated user can trigger the buffer overflow by sending crafted requests to vulnerable NETGEAR routers.

Mitigation and Prevention

Steps to mitigate the CVE-2021-45528 vulnerability.

Immediate Steps to Take

Update the affected routers to the latest firmware versions provided by NETGEAR.
Restrict network access to authorized users only.

Long-Term Security Practices

Regularly monitor vendor security advisories for firmware updates.
Implement strong password policies and multi-factor authentication.

Patching and Updates

Apply patches and firmware updates promptly to address known vulnerabilities in NETGEAR routers.