CVE-2019-15219 : Exploit Details and Defense Strategies

A problem has been identified in the Linux kernel version prior to 5.1.8. The drivers/usb/misc/sisusbvga/sisusb.c driver can trigger a NULL pointer dereference due to the presence of a malicious USB device.

Understanding CVE-2019-15219

An issue was discovered in the Linux kernel before 5.1.8. There is a NULL pointer dereference caused by a malicious USB device in the drivers/usb/misc/sisusbvga/sisusb.c driver.

What is CVE-2019-15219?

This CVE refers to a vulnerability in the Linux kernel that allows a malicious USB device to trigger a NULL pointer dereference in the sisusbvga driver.

The Impact of CVE-2019-15219

The vulnerability can be exploited by an attacker with physical access to the system via a specially crafted USB device, potentially leading to a denial of service (DoS) or arbitrary code execution.

Technical Details of CVE-2019-15219

Vulnerability Description

The drivers/usb/misc/sisusbvga/sisusb.c driver in Linux kernel versions prior to 5.1.8 is susceptible to a NULL pointer dereference triggered by a malicious USB device.

Affected Systems and Versions

Linux kernel versions before 5.1.8

Exploitation Mechanism

The vulnerability can be exploited by an attacker inserting a malicious USB device, causing the driver to dereference a NULL pointer and potentially leading to system compromise.

Mitigation and Prevention

Immediate Steps to Take

Update to Linux kernel version 5.1.8 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 software to patch known vulnerabilities.
Implement device control policies to restrict the connection of unauthorized USB devices.

Patching and Updates

Ensure timely installation of security updates provided by Linux distributions and vendors to address known vulnerabilities.