CVE-2019-19525 : What You Need to Know

A use-after-free vulnerability in the Linux kernel prior to version 5.3.6 can be exploited by a malicious USB device in the drivers/net/ieee802154/atusb.c driver.

Understanding CVE-2019-19525

This CVE involves a critical bug in the Linux kernel that allows for a use-after-free vulnerability when interacting with a malevolent USB device.

What is CVE-2019-19525?

This CVE refers to a specific flaw in the Linux kernel before version 5.3.6, which can be triggered by a malicious USB device, potentially leading to a security breach.

The Impact of CVE-2019-19525

The vulnerability poses a significant risk as it can be exploited by an attacker to execute arbitrary code or crash the system, compromising the integrity and security of affected devices.

Technical Details of CVE-2019-19525

This section provides detailed technical insights into the vulnerability.

Vulnerability Description

The bug in the Linux kernel prior to version 5.3.6 allows for a use-after-free vulnerability triggered by a malevolent USB device in the drivers/net/ieee802154/atusb.c driver, also known as CID-7fd25e6fc035.

Affected Systems and Versions

Systems running Linux kernel versions before 5.3.6 are vulnerable.

Exploitation Mechanism

The vulnerability can be exploited by a malicious USB device interacting with the specific driver, leading to potential system compromise.

Mitigation and Prevention

Protecting systems from CVE-2019-19525 requires immediate actions and long-term security measures.

Immediate Steps to Take

Update the Linux kernel to version 5.3.6 or newer to mitigate the vulnerability.
Monitor and restrict USB device connections to trusted sources.

Long-Term Security Practices

Implement strict device driver validation processes.
Regularly monitor and apply security patches to the kernel and related components.

Patching and Updates

Regularly check for security advisories and updates from Linux distributions and kernel repositories to stay protected.