CVE-2020-10063 : Security Advisory and Response

A remote adversary with the ability to send arbitrary CoAP packets to be parsed by Zephyr is able to cause a denial of service. This vulnerability affects zephyrproject-rtos Zephyr version 2.2.0 and later versions.

Understanding CVE-2020-10063

This CVE involves a remote denial of service vulnerability in CoAP option parsing due to an integer overflow.

What is CVE-2020-10063?

CVE-2020-10063 is a security vulnerability that allows a remote attacker to exploit Zephyr's CoAP packet parsing, leading to a denial of service.

The Impact of CVE-2020-10063

The vulnerability has a CVSS base score of 6.8, with a medium severity rating. It can result in a high impact on availability, affecting systems running Zephyr version 2.2.0 and later.

Technical Details of CVE-2020-10063

This section provides more in-depth technical information about the vulnerability.

Vulnerability Description

The vulnerability arises from an integer overflow in the CoAP option parsing mechanism in Zephyr, allowing remote attackers to trigger a denial of service condition.

Affected Systems and Versions

Product: Zephyr
Vendor: zephyrproject-rtos
Affected Versions: 2.2.0, 2.1.0, 1.14.0

Exploitation Mechanism

Attack Complexity: High
Attack Vector: Network
Privileges Required: None
User Interaction: None
Scope: Changed
Vector String: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H

Mitigation and Prevention

To address CVE-2020-10063, follow these mitigation strategies:

Immediate Steps to Take

Apply the provided patches promptly.
Monitor network traffic for any suspicious activity.
Implement network segmentation to limit the impact of potential attacks.

Long-Term Security Practices

Regularly update Zephyr to the latest version to patch known vulnerabilities.
Conduct security assessments and penetration testing to identify and address potential weaknesses.

Patching and Updates

Ensure all systems running Zephyr are updated with the latest security patches.