CVE-2019-19523 : Security Advisory and Response

A vulnerability exists in the Linux kernel versions prior to 5.3.7, specifically in the drivers/usb/misc/adutux.c driver. This vulnerability, known as CID-44efc269db79, is triggered by a malicious USB device and results in a use-after-free bug.

Understanding CVE-2019-19523

This CVE identifies a use-after-free bug in the Linux kernel's USB driver that can be exploited by a malicious USB device.

What is CVE-2019-19523?

CVE-2019-19523 is a vulnerability in the Linux kernel versions before 5.3.7, located in the drivers/usb/misc/adutux.c driver. It can be exploited by a malicious USB device, leading to a use-after-free bug.

The Impact of CVE-2019-19523

The vulnerability can allow an attacker to execute arbitrary code or cause a denial of service by exploiting the use-after-free bug triggered by a malicious USB device.

Technical Details of CVE-2019-19523

This section provides more technical insights into the vulnerability.

Vulnerability Description

The use-after-free bug in the Linux kernel's drivers/usb/misc/adutux.c driver can be exploited by a malicious USB device, potentially leading to arbitrary code execution or denial of service.

Affected Systems and Versions

Affected Systems: Linux kernel versions prior to 5.3.7
Affected Driver: drivers/usb/misc/adutux.c

Exploitation Mechanism

The vulnerability is triggered by a malicious USB device, causing a use-after-free bug in the specified driver.

Mitigation and Prevention

Protecting systems from CVE-2019-19523 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update to Linux kernel version 5.3.7 or later to mitigate the vulnerability.
Avoid connecting untrusted USB devices to the system.

Long-Term Security Practices

Regularly update the Linux kernel and system components to patch known vulnerabilities.
Implement device control policies to restrict USB device usage.

Patching and Updates

Apply security updates provided by Linux distributions to address CVE-2019-19523.