CVE-2019-15917 : Vulnerability Insights and Analysis

A problem was found in the Linux kernel versions earlier than 5.0.5. The vulnerability involves a use-after-free issue in the hci_uart_set_proto() function within the hci_ldisc.c file.

Understanding CVE-2019-15917

This CVE identifies a specific vulnerability in the Linux kernel that can lead to a use-after-free problem.

What is CVE-2019-15917?

CVE-2019-15917 is a vulnerability in the Linux kernel versions prior to 5.0.5. It occurs when hci_uart_register_dev() fails in the hci_uart_set_proto() function within the hci_ldisc.c file.

The Impact of CVE-2019-15917

This vulnerability could allow an attacker to execute arbitrary code or cause a denial of service (DoS) condition on the affected system.

Technical Details of CVE-2019-15917

This section provides more in-depth technical information about the CVE.

Vulnerability Description

The issue arises from a use-after-free problem in the hci_uart_set_proto() function within the hci_ldisc.c file of the Linux kernel versions earlier than 5.0.5.

Affected Systems and Versions

Linux kernel versions before 5.0.5

Exploitation Mechanism

The vulnerability occurs when hci_uart_register_dev() fails in the hci_uart_set_proto() function, leading to a use-after-free problem.

Mitigation and Prevention

Protecting systems from CVE-2019-15917 requires immediate action and long-term security practices.

Immediate Steps to Take

Apply the necessary 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.
Implement proper security measures and best practices to prevent and detect potential exploits.
Conduct regular security assessments and audits to identify and address vulnerabilities.
Consider implementing intrusion detection systems (IDS) to monitor and respond to suspicious activities.

Patching and Updates

Ensure that all affected systems are updated with the latest patches released by the Linux kernel maintainers to address the CVE-2019-15917 vulnerability.