CVE-2021-32847 : Vulnerability Insights and Analysis

A detailed overview of CVE-2021-32847 outlining the vulnerability, its impact, technical details, and mitigation strategies.

Understanding CVE-2021-32847

This section provides insights into the Moby HyperKit vulnerability identified as 'uninitialized memory use in virtio-sock pci_vtsock_proc_tx'.

What is CVE-2021-32847?

CVE-2021-32847 involves a vulnerability in HyperKit versions 0.20210107 and prior, where a malicious guest can exploit the disk driver to disclose host memory to the virtualized guest. The issue has been addressed in commit cf60095a4d8c3cb2e182a14415467afd356e982f.

The Impact of CVE-2021-32847

The vulnerability could allow a malicious actor to access sensitive host memory from a virtualized guest, posing a risk to data confidentiality.

Technical Details of CVE-2021-32847

Explore the specifics of the vulnerability including its description, affected systems, and exploitation mechanism.

Vulnerability Description

The vulnerability in HyperKit allows for uninitialized memory use in virtio-sock pci_vtsock_proc_tx, enabling the disclosure of host memory to a malicious guest.

Affected Systems and Versions

The affected system is the Moby HyperKit with versions up to and including 0.20210107.

Exploitation Mechanism

By abusing the disk driver in vulnerable HyperKit versions, a malicious guest can trigger the vulnerability and access host memory.

Mitigation and Prevention

Discover the immediate steps and best practices to mitigate the CVE-2021-32847 vulnerability.

Immediate Steps to Take

Users are advised to update HyperKit to the fixed version (commit cf60095a4d8c3cb2e182a14415467afd356e982f) to eliminate the risk of exploitation.

Long-Term Security Practices

Implement regular software updates and security patches to protect against known vulnerabilities and enhance system security.

Patching and Updates

Stay informed about security advisories and patches released by Moby HyperKit to address potential security risks.