CVE-2021-36143 : Security Advisory and Response

ACRN before version 2.5 is affected by a NULL Pointer Dereference vulnerability in hw/pci/virtio/virtio.c vq_endchains. This can lead to a denial of service condition when exploited.

Understanding CVE-2021-36143

This section delves into the details of the CVE-2021-36143 vulnerability.

What is CVE-2021-36143?

The CVE-2021-36143 vulnerability exists in ACRN versions prior to 2.5 due to a NULL Pointer Dereference issue in virtio.c vq_endchains. Attackers can exploit this vulnerability to trigger a denial of service.

The Impact of CVE-2021-36143

Exploitation of this vulnerability can result in a denial of service condition, impacting the availability of the affected system.

Technical Details of CVE-2021-36143

In this section, we explore the technical aspects of CVE-2021-36143.

Vulnerability Description

ACRN versions before 2.5 contain a NULL Pointer Dereference vulnerability in hw/pci/virtio/virtio.c vq_endchains.

Affected Systems and Versions

The vulnerability affects ACRN versions earlier than 2.5.

Exploitation Mechanism

Attackers can exploit this vulnerability to cause a denial of service by leveraging the NULL Pointer Dereference flaw.

Mitigation and Prevention

Protecting systems from CVE-2021-36143 requires immediate action and long-term security practices.

Immediate Steps to Take

Update ACRN to version 2.5 or newer to mitigate the vulnerability. Implement network security controls to limit exposure.

Long-Term Security Practices

Regularly update software and apply patches promptly to address known vulnerabilities. Conduct security audits and employ intrusion detection systems.

Patching and Updates

Stay informed about security advisories related to ACRN. Apply security patches and updates as soon as they are released.