CVE-2018-21163 : Security Advisory and Response

Several NETGEAR devices are susceptible to a stack-based buffer overflow when accessed by an authorized user. This vulnerability impacts various models including DGN2200Bv4, DGN2200v4, EX3700, EX3800, EX6000, EX6100, EX6120, EX6130, EX6150, EX6200, EX7000, R6300v2, R6900P, R7000P, R7300DST, R7900P, R8000, R8000P, WN2500RPv2, and WNDR3400v3.

Understanding CVE-2018-21163

This CVE entry describes a stack-based buffer overflow vulnerability affecting multiple NETGEAR device models.

What is CVE-2018-21163?

The vulnerability allows an authenticated user to trigger a stack-based buffer overflow on the affected NETGEAR devices, potentially leading to arbitrary code execution.

The Impact of CVE-2018-21163

The CVSS v3.0 base score for this vulnerability is 6.8, indicating a medium severity issue. The impact includes high confidentiality, integrity, and availability impacts, with high privileges required for exploitation.

Technical Details of CVE-2018-21163

This section provides more technical insights into the vulnerability.

Vulnerability Description

The vulnerability is a stack-based buffer overflow that can be exploited by an authenticated user on the listed NETGEAR device models.

Affected Systems and Versions

The following NETGEAR device models are affected by this vulnerability:

DGN2200Bv4 (versions prior to 1.0.0.102)
DGN2200v4 (versions prior to 1.0.0.102)
EX3700 (versions prior to 1.0.0.70)
EX3800 (versions prior to 1.0.0.70)
and more...

Exploitation Mechanism

The vulnerability can be exploited by an authenticated user, requiring high privileges, and can result in a stack-based buffer overflow leading to potential arbitrary code execution.

Mitigation and Prevention

To address CVE-2018-21163, follow these mitigation strategies:

Immediate Steps to Take

Update the firmware of the affected NETGEAR devices to the latest patched versions.
Restrict network access to authorized users only.
Monitor network traffic for any suspicious activities.

Long-Term Security Practices

Regularly update and patch all network-connected devices.
Implement strong authentication mechanisms and access controls.
Conduct regular security audits and assessments.

Patching and Updates

Ensure timely installation of security patches and firmware updates provided by NETGEAR to mitigate the vulnerability effectively.