CVE-2018-21148 : Security Advisory and Response

A stack-based buffer overflow vulnerability has been identified in certain models of NETGEAR devices, allowing exploitation by an authenticated user. Affected models include D7800, DM200, R6100, R7500, R7500v2, R7800, R8900, R9000, WNDR3700v4, WNDR4300, WNDR4300v2, WNDR4500v3, and WNR2000v5.

Understanding CVE-2018-21148

This CVE involves a stack-based buffer overflow vulnerability in specific NETGEAR devices, potentially leading to unauthorized access.

What is CVE-2018-21148?

A stack-based buffer overflow vulnerability affecting certain NETGEAR devices, exploitable by authenticated users.

The Impact of CVE-2018-21148

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

Technical Details of CVE-2018-21148

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The vulnerability is a stack-based buffer overflow in certain NETGEAR devices, allowing authenticated users to exploit it.

Affected Systems and Versions

The following models are affected:

D7800 (version prior to 1.0.1.34)
DM200 (version prior to 1.0.0.50)
R6100 (version prior to 1.0.1.22)
R7500 (version prior to 1.0.0.122)
R7500v2 (version prior to 1.0.3.26)
R7800 (version prior to 1.0.2.42)
R8900 (version prior to 1.0.3.10)
R9000 (version prior to 1.0.3.10)
WNDR3700v4 (version prior to 1.0.2.96)
WNDR4300 (version prior to 1.0.2.98)
WNDR4300v2 (version prior to 1.0.0.54)
WNDR4500v3 (version prior to 1.0.0.54)
WNR2000v5 (version prior to 1.0.0.64)

Exploitation Mechanism

The vulnerability can be exploited by authenticated users to perform a stack-based buffer overflow on the affected NETGEAR devices.

Mitigation and Prevention

Protecting systems from CVE-2018-21148 requires immediate actions and long-term security practices.

Immediate Steps to Take

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

Long-Term Security Practices

Regularly update firmware and security patches.
Implement strong authentication mechanisms.
Conduct regular security audits and assessments.

Patching and Updates

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