CVE-2022-27646 Explained : Impact and Mitigation

This article provides a detailed overview of CVE-2022-27646, a vulnerability that allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR R6700v3 1.0.4.120_10.0.91 routers.

Understanding CVE-2022-27646

This section will cover the implications and technical details of CVE-2022-27646.

What is CVE-2022-27646?

CVE-2022-27646 allows attackers to trigger a stack-based buffer overflow in the circled daemon of NETGEAR R6700v3 routers using a crafted circleinfo.txt file, leading to arbitrary code execution in the context of root.

The Impact of CVE-2022-27646

The vulnerability poses a significant risk as it enables attackers to bypass authentication mechanisms and gain unauthorized access to affected routers, potentially compromising the confidentiality, integrity, and availability of the system.

Technical Details of CVE-2022-27646

This section will delve into the vulnerability description, affected systems, versions, and exploitation mechanism.

Vulnerability Description

The flaw in the circled daemon allows for a buffer overflow in a fixed-length stack-based buffer, granting attackers the ability to execute arbitrary code with elevated privileges.

Affected Systems and Versions

NETGEAR R6700v3 routers running version 1.0.4.120_10.0.91 are impacted by this vulnerability.

Exploitation Mechanism

Attackers can exploit the CVE-2022-27646 by utilizing a crafted circleinfo.txt file to trigger the buffer overflow, leading to the execution of malicious code.

Mitigation and Prevention

This section will outline the immediate steps to take and long-term security practices to mitigate the risks associated with CVE-2022-27646.

Immediate Steps to Take

Users are advised to apply patches released by NETGEAR promptly to address the vulnerability and prevent potential exploitation. Additionally, implementing network segmentation and access controls can help minimize the risk of unauthorized access.

Long-Term Security Practices

Maintaining regular security updates, conducting security audits, and employing strong authentication mechanisms can enhance the overall security posture of the network and prevent similar vulnerabilities in the future.

Patching and Updates

Stay informed about security advisories from the vendor and ensure timely patching of any identified vulnerabilities to protect network infrastructure from potential threats.