CVE-2017-18360 : What You Need to Know

This CVE article discusses a vulnerability in the Linux kernel before version 4.11.3 that allows local users to launch a denial of service attack by manipulating baud rates, leading to a division-by-zero error.

Understanding CVE-2017-18360

This CVE identifies a specific vulnerability in the Linux kernel that can be exploited by local users to cause a denial of service attack.

What is CVE-2017-18360?

The vulnerability in the Linux kernel before version 4.11.3 allows local users to trigger a denial of service attack by setting extremely high baud rates, resulting in a division-by-zero error within the serial device layer.

The Impact of CVE-2017-18360

The vulnerability poses a risk of denial of service attacks by local users attempting to manipulate baud rates, potentially disrupting system functionality.

Technical Details of CVE-2017-18360

This section delves into the technical aspects of the CVE.

Vulnerability Description

The vulnerability exists in the change_port_settings function in drivers/usb/serial/io_ti.c in the Linux kernel before version 4.11.3, enabling local users to cause a denial of service through a division-by-zero error in the serial device layer when setting high baud rates.

Affected Systems and Versions

Affected System: Linux kernel before version 4.11.3
Affected Component: drivers/usb/serial/io_ti.c

Exploitation Mechanism

The vulnerability can be exploited by local users manipulating baud rates to extremely high levels, triggering a division-by-zero error in the serial device layer.

Mitigation and Prevention

Protecting systems from CVE-2017-18360 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply patches provided by the Linux kernel to mitigate the vulnerability.
Monitor and restrict user access to prevent unauthorized manipulation of system settings.

Long-Term Security Practices

Regularly update the Linux kernel to the latest stable version to ensure all security patches are applied.
Implement least privilege access controls to limit the impact of potential vulnerabilities.

Patching and Updates

Stay informed about security advisories and updates from Linux kernel maintainers.
Promptly apply patches and updates to address known vulnerabilities.