CVE-2019-19531 Explained : Impact and Mitigation

A use-after-free vulnerability exists in the Linux kernel versions prior to 5.2.9. This vulnerability can be exploited by a malicious USB device in the drivers/usb/misc/yurex.c driver, also known as CID-fc05481b2fca.

Understanding CVE-2019-19531

This CVE involves a critical vulnerability in the Linux kernel that allows for potential exploitation by a malicious USB device.

What is CVE-2019-19531?

CVE-2019-19531 is a use-after-free vulnerability found in Linux kernel versions before 5.2.9. It specifically resides in the drivers/usb/misc/yurex.c driver, which can be abused by a malicious USB device.

The Impact of CVE-2019-19531

This vulnerability could lead to a security breach where an attacker could execute arbitrary code or cause a denial of service (DoS) on the affected system.

Technical Details of CVE-2019-19531

This section delves into the technical aspects of the CVE.

Vulnerability Description

The use-after-free bug in the Linux kernel, prior to version 5.2.9, can be triggered by a malicious USB device in the drivers/usb/misc/yurex.c driver, identified as CID-fc05481b2fca.

Affected Systems and Versions

Linux kernel versions before 5.2.9

Exploitation Mechanism

The vulnerability can be exploited by a malicious USB device in the drivers/usb/misc/yurex.c driver, allowing an attacker to potentially execute arbitrary code or launch a DoS attack.

Mitigation and Prevention

Protecting systems from CVE-2019-19531 is crucial to maintaining security.

Immediate Steps to Take

Update the Linux kernel to version 5.2.9 or newer to mitigate the vulnerability.
Monitor and restrict USB device connections to trusted sources.

Long-Term Security Practices

Regularly update and patch the Linux kernel and system components.
Implement strict access controls and security policies to prevent unauthorized access.

Patching and Updates

Stay informed about security advisories and promptly apply patches released by Linux distributions and vendors.