CVE-2022-2741 Explained : Impact and Mitigation

A denial-of-service vulnerability can be triggered by a carefully crafted CAN frame, affecting Zephyr Project RTOS.

Understanding CVE-2022-2741

This CVE involves a denial-of-service exploit that can be initiated by sending a specialized CAN frame on the same network as the vulnerable node.

What is CVE-2022-2741?

The CVE-2022-2741 vulnerability allows attackers to conduct denial-of-service attacks by transmitting a meticulously designed CAN frame on the network where the vulnerable node resides. The crafted frame needs to meet specific criteria to exploit the vulnerability.

The Impact of CVE-2022-2741

The vulnerability poses a high severity risk, with a CVSS base score of 8.2. It can lead to a denial of service on the affected systems running Zephyr Project RTOS.

Technical Details of CVE-2022-2741

This section provides crucial technical information about the vulnerability.

Vulnerability Description

The denial-of-service can be triggered by transmitting a carefully crafted CAN frame on the same CAN network as the vulnerable node. The frame must have a CAN ID matching an installed filter in the vulnerable node and contain the opposite RTR bit as the filter.

Affected Systems and Versions

Zephyr Project RTOS version 3.1 and below are affected by this vulnerability.

Exploitation Mechanism

Attackers can exploit this vulnerability by sending a CAN frame that matches an installed filter's CAN ID and contains the opposite RTR bit.

Mitigation and Prevention

To enhance security and protect systems from CVE-2022-2741, consider the following measures.

Immediate Steps to Take

Implement network segmentation to isolate critical systems from the CAN network. Monitor CAN traffic for unusual activities.

Long-Term Security Practices

Regularly update and patch Zephyr Project RTOS to the latest version to mitigate known vulnerabilities and enhance security.