CVE-2019-19052 : Vulnerability Insights and Analysis

A vulnerability in the gs_can_open() function in the Linux kernel versions prior to 5.3.11 can lead to a denial of service by causing excessive memory consumption.

Understanding CVE-2019-19052

What is CVE-2019-19052?

The vulnerability exists in the gs_can_open() function in the Linux kernel versions before 5.3.11, allowing attackers to trigger usb_submit_urb() failures, resulting in a denial of service due to memory consumption.

The Impact of CVE-2019-19052

Exploiting this vulnerability can lead to a denial of service condition by consuming excessive memory, affecting the availability of the system.

Technical Details of CVE-2019-19052

Vulnerability Description

A memory leak in the gs_can_open() function in drivers/net/can/usb/gs_usb.c in the Linux kernel before 5.3.11 allows attackers to cause a denial of service (memory consumption) by triggering usb_submit_urb() failures, known as CID-fb5be6a7b486.

Affected Systems and Versions

Vulnerable: Linux kernel versions prior to 5.3.11

Exploitation Mechanism

Attackers can exploit this vulnerability by triggering failures in the usb_submit_urb() function, leading to memory consumption and a denial of service condition.

Mitigation and Prevention

Immediate Steps to Take

Apply the necessary security updates provided by the Linux kernel maintainers.
Monitor system resources for any unusual memory consumption patterns.

Long-Term Security Practices

Regularly update the Linux kernel to the latest stable version to mitigate known vulnerabilities.
Implement proper access controls and network segmentation to reduce the attack surface.

Patching and Updates

Ensure timely patching of the Linux kernel to address security vulnerabilities and improve system resilience.