CVE-2019-19533 : Security Advisory and Response

A vulnerability in the Linux kernel versions prior to 5.3.4 can lead to an information leak through a malicious USB device.

Understanding CVE-2019-19533

This CVE identifies a specific vulnerability in the Linux kernel that can be exploited through the ttusb_dec.c driver.

What is CVE-2019-19533?

The vulnerability in the ttusb_dec.c driver of Linux kernels before version 5.3.4 can result in an information leak when triggered by a malicious USB device. It has been assigned the identifier CID-a10feaf8c464.

The Impact of CVE-2019-19533

The vulnerability allows for potential information leakage, which could be exploited by attackers to access sensitive data through a crafted USB device.

Technical Details of CVE-2019-19533

This section provides more in-depth technical insights into the vulnerability.

Vulnerability Description

The vulnerability exists in the drivers/media/usb/ttusb-dec/ttusb_dec.c driver of Linux kernels prior to version 5.3.4, enabling an information leak.

Affected Systems and Versions

Affected System: Linux kernel versions before 5.3.4
Affected Component: drivers/media/usb/ttusb-dec/ttusb_dec.c driver
Version: Not applicable

Exploitation Mechanism

The vulnerability can be exploited by a malicious USB device to trigger the information leak in the ttusb_dec.c driver.

Mitigation and Prevention

Protecting systems from CVE-2019-19533 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update to Linux kernel version 5.3.4 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 the vulnerability.