CVE-2017-16525 : What You Need to Know

In the Linux kernel prior to version 4.13.8, a vulnerability exists in the usb_serial_console_disconnect function that could be exploited by local users to trigger a denial of service attack. This could lead to a system crash or other potential consequences when a maliciously crafted USB device is connected, causing a use-after-free issue and failed setup.

Understanding CVE-2017-16525

This CVE entry highlights a vulnerability in the Linux kernel that could be abused by local users to disrupt system operations.

What is CVE-2017-16525?

The usb_serial_console_disconnect function in the Linux kernel before version 4.13.8 allows local users to cause a denial of service or potentially have other impacts by connecting a crafted USB device, resulting in a use-after-free issue and system crash.

The Impact of CVE-2017-16525

The exploitation of this vulnerability could lead to a denial of service attack, system crashes, and other unspecified consequences, posing a risk to the stability and security of affected systems.

Technical Details of CVE-2017-16525

This section delves into the technical aspects of the CVE entry.

Vulnerability Description

The usb_serial_console_disconnect function in drivers/usb/serial/console.c in the Linux kernel before 4.13.8 allows local users to cause a denial of service (use-after-free and system crash) or possibly have unspecified other impact via a crafted USB device, related to disconnection and failed setup.

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Versions: All versions before Linux kernel 4.13.8

Exploitation Mechanism

The vulnerability can be exploited by local users through the usb_serial_console_disconnect function when a maliciously crafted USB device is connected, leading to a use-after-free issue and system crash.

Mitigation and Prevention

Protecting systems from CVE-2017-16525 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply security updates provided by the Linux kernel to patch the vulnerability.
Monitor USB device connections for any suspicious activity.

Long-Term Security Practices

Implement least privilege access to limit user capabilities.
Regularly update and patch the Linux kernel to address security vulnerabilities.

Patching and Updates

Update the Linux kernel to version 4.13.8 or newer to mitigate the vulnerability.