CVE-2019-17075 : What You Need to Know

A vulnerability was found in the write_tpt_entry function within the mem.c file of the cxgb4 driver in the Linux kernel versions up to 5.3.2. The issue arises from the direct usage of dma_map_single, a DMA function, on a stack variable by the cxgb4 driver. Exploitation of this vulnerability could lead to a Denial of Service attack, particularly on architectures where the stack/DMA interaction holds security implications.

Understanding CVE-2019-17075

This CVE identifies a vulnerability in the Linux kernel that could be exploited for a Denial of Service attack.

What is CVE-2019-17075?

CVE-2019-17075 is a vulnerability in the Linux kernel's cxgb4 driver that allows for a Denial of Service attack due to improper handling of DMA functions on stack variables.

The Impact of CVE-2019-17075

The exploitation of this vulnerability could result in a Denial of Service attack, especially on architectures where the stack/DMA interaction poses security risks.

Technical Details of CVE-2019-17075

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The vulnerability exists in the write_tpt_entry function within the mem.c file of the cxgb4 driver in Linux kernel versions up to 5.3.2. It stems from the direct use of dma_map_single on a stack variable, potentially leading to a Denial of Service.

Affected Systems and Versions

Linux kernel versions up to 5.3.2

Exploitation Mechanism

The vulnerability is exploited by manipulating the DMA function on a stack variable, allowing attackers to trigger a Denial of Service attack.

Mitigation and Prevention

Protecting systems from CVE-2019-17075 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply relevant security patches provided by the Linux kernel maintainers.
Monitor official sources for updates and advisories related to this vulnerability.

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

Stay informed about security updates and patches released by the Linux kernel community to address CVE-2019-17075.