CVE-2019-9547 : Vulnerability Insights and Analysis

A vulnerability in the Storage Performance Development Kit (SPDK) prior to version 19.01 allowed a malicious virtual machine to create a circular descriptor chain, leading to a partial denial of service within the SPDK vhost target.

Understanding CVE-2019-9547

Prior to version 19.01 of SPDK, a specific vulnerability existed that could be exploited by a virtual machine acting as a vhost client.

What is CVE-2019-9547?

In SPDK versions before 19.01, a virtual machine could intentionally create a circular descriptor chain, causing a partial denial of service within the SPDK vhost target due to inadequate chain detection.

The Impact of CVE-2019-9547

The vulnerability allowed for a partial denial of service within the SPDK vhost target, affecting system availability and performance.

Technical Details of CVE-2019-9547

This section provides more technical insights into the vulnerability.

Vulnerability Description

A virtual machine acting as a vhost client could craft a circular descriptor chain, leading to a partial denial of service within the SPDK vhost target.

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Versions affected: Not applicable

Exploitation Mechanism

The exploitation involved deliberately creating a circular descriptor chain to trigger the vulnerability.

Mitigation and Prevention

Protecting systems from CVE-2019-9547 requires specific actions to mitigate risks.

Immediate Steps to Take

Upgrade to version 19.01 of the SPDK to eliminate the vulnerability.
Monitor and restrict virtual machine activities to prevent malicious chain creation.

Long-Term Security Practices

Regularly update SPDK and other software components to patch vulnerabilities.
Implement network segmentation to isolate virtual machines and reduce attack surface.

Patching and Updates

Apply patches and updates promptly to ensure system security and prevent exploitation of known vulnerabilities.