CVE-2019-13631 Explained : Impact and Mitigation

An out-of-bounds write vulnerability in the Linux kernel through version 5.2.1 can be exploited by a malicious USB device. The vulnerability is triggered in the parse_hid_report_descriptor function in gtco.c.

Understanding CVE-2019-13631

This CVE involves a critical vulnerability in the Linux kernel that allows a malicious USB device to trigger an out-of-bounds write.

What is CVE-2019-13631?

This vulnerability arises from the mishandling of HID reports by the Linux kernel, leading to an out-of-bounds write when processing debugging messages from a USB device.

The Impact of CVE-2019-13631

The exploitation of this vulnerability can result in a potential security breach, allowing an attacker to execute arbitrary code or crash the system.

Technical Details of CVE-2019-13631

This section delves into the technical aspects of the CVE.

Vulnerability Description

The vulnerability occurs in the parse_hid_report_descriptor function in gtco.c, allowing a malicious USB device to trigger an out-of-bounds write during the generation of debugging messages.

Affected Systems and Versions

Linux kernel through version 5.2.1

Exploitation Mechanism

The vulnerability is exploited by a malicious USB device sending a specially crafted HID report to the kernel, triggering the out-of-bounds write.

Mitigation and Prevention

Protecting systems from CVE-2019-13631 is crucial to maintaining security.

Immediate Steps to Take

Apply relevant security patches provided by the Linux kernel maintainers.
Monitor for any suspicious USB device activity.

Long-Term Security Practices

Regularly update the Linux kernel to the latest stable version.
Implement USB device usage policies to prevent unauthorized devices from connecting.

Patching and Updates

Ensure timely installation of security updates and patches released by the Linux kernel maintainers to address the CVE-2019-13631 vulnerability.