CVE-2021-37566 Explained : Impact and Mitigation
Learn about CVE-2021-37566, a high-severity vulnerability affecting MediaTek microchips used in NETGEAR devices and other systems. Find out the impact, technical details, and mitigation steps.
This article provides an overview of CVE-2021-37566, a vulnerability associated with MediaTek microchips affecting NETGEAR devices and others.
Understanding CVE-2021-37566
CVE-2021-37566 is a vulnerability related to how MediaTek microchips handle IEEE 1905 protocols, impacting various chipsets and software versions, including MT7603E, MT7610, MT7613, MT7615, MT7620, MT7622, MT7628, MT7629, MT7915, and versions 2.0.2.
What is CVE-2021-37566?
The vulnerability occurs due to mishandling of IEEE 1905 protocols by MediaTek microchips, leading to an out-of-bounds write issue.
The Impact of CVE-2021-37566
With a CVSS base score of 8.2 out of 10, CVE-2021-37566 has a high severity level, primarily affecting confidentiality but not integrity. The attack complexity is low, with network access and no user interaction required.
Technical Details of CVE-2021-37566
This section delves into the technical aspects of the CVE.
Vulnerability Description
The vulnerability arises from the incorrect handling of IEEE 1905 protocols, resulting in an out-of-bounds write that could potentially lead to unauthorized access and data leakage.
Affected Systems and Versions
Devices utilizing MediaTek microchips, particularly NETGEAR devices up to 2021-11-11, and other systems incorporating chipsets MT7603E, MT7610, MT7613, MT7615, MT7620, MT7622, MT7628, MT7629, and MT7915 with software version 2.0.2, are vulnerable to exploitation.
Exploitation Mechanism
Attackers can exploit this vulnerability remotely through the network without requiring any special privileges or user interaction.
Mitigation and Prevention
To mitigate the risks associated with CVE-2021-37566, it is crucial to take immediate and proactive security measures.
Immediate Steps to Take
- Apply security patches released by MediaTek and NETGEAR promptly.
- Monitor network traffic for any suspicious activity.
Long-Term Security Practices
- Regularly update firmware and software to the latest versions.
- Implement network segmentation to limit the impact of potential breaches.
- Conduct regular security audits and assessments.
Patching and Updates
Stay informed about security advisories from MediaTek and NETGEAR, and apply patches and updates as soon as they are available to ensure optimal protection against CVE-2021-37566.