CVE-2019-18844 : Exploit Details and Defense Strategies

A vulnerability in the Device Model of ACRN before version 2019w25.5-140000p could allow attackers to trigger a denial of service by exploiting assert calls within the pci core.

Understanding CVE-2019-18844

This CVE details a vulnerability in the Device Model of ACRN that could lead to a denial of service attack.

What is CVE-2019-18844?

The vulnerability in ACRN's Device Model prior to version 2019w25.5-140000p allows attackers to cause a denial of service by manipulating assert calls within the pci core.

The Impact of CVE-2019-18844

Exploiting this vulnerability could result in a denial of service condition within the pci core, potentially disrupting system operations.

Technical Details of CVE-2019-18844

This section provides technical insights into the vulnerability.

Vulnerability Description

The issue arises from the use of assert calls in devicemodel/hw/pci/core.c and devicemodel/include/pci_core.h, instead of alternative error-handling mechanisms, enabling attackers to trigger a denial of service.

Affected Systems and Versions

ACRN versions before 2019w25.5-140000p

Exploitation Mechanism

Attackers can exploit the vulnerability by manipulating assert calls within the pci core, leading to a denial of service.

Mitigation and Prevention

Protective measures and solutions to address the CVE.

Immediate Steps to Take

Update ACRN to version 1.2 to resolve the vulnerability
For versions prior to 1.1, apply mitigation 6199e653418e
For version 1.1, implement mitigation 2b3dedfb9ba1

Long-Term Security Practices

Regularly update software to the latest versions
Implement secure coding practices
Conduct security audits and assessments

Patching and Updates

Ensure timely patching and updates to address known vulnerabilities.