CVE-2021-45609 : Exploit Details and Defense Strategies

Certain NETGEAR devices are affected by a buffer overflow by an unauthenticated attacker. This affects multiple router models before specific firmware versions.

Understanding CVE-2021-45609

What is CVE-2021-45609?

CVE-2021-45609 is a critical vulnerability impacting certain NETGEAR router models due to a buffer overflow that can be exploited by an unauthenticated attacker.

The Impact of CVE-2021-45609

This vulnerability has the following impact according to CVSS v3.1 metrics:

Base Score: 9.6 (Critical)
Attack Complexity: Low
Attack Vector: Adjacent Network
Privileges Required: None
User Interaction: None
Confidentiality Impact: High
Integrity Impact: High
Availability Impact: High
Scope: Changed

Technical Details of CVE-2021-45609

Vulnerability Description

The vulnerability involves a buffer overflow in certain NETGEAR router models. Affected devices include D8500, R6250, R7000, R7100LG, R7900, R8300, R8500, XR300, R7000P, and R6900P before specific firmware versions.

Affected Systems and Versions

D8500 before 1.0.3.58
R6250 before 1.0.4.48
R7000 before 1.0.11.116
R7100LG before 1.0.0.64
R7900 before 1.0.4.38
R8300 before 1.0.2.144
R8500 before 1.0.2.144
XR300 before 1.0.3.68
R7000P before 1.3.2.132
R6900P before 1.3.2.132

Exploitation Mechanism

The vulnerability can be exploited by an unauthenticated attacker through the buffer overflow on the affected NETGEAR devices.

Mitigation and Prevention

Immediate Steps to Take

Apply security patches provided by NETGEAR for the affected router models.
Monitor network traffic for any signs of exploitation.

Long-Term Security Practices

Regularly update firmware on all network devices.
Implement strong network security measures to prevent unauthorized access.
Conduct security assessments and penetration testing periodically.

Patching and Updates

It is crucial to promptly apply firmware updates and security patches released by NETGEAR to mitigate the CVE-2021-45609 vulnerability.