CVE-2017-17558 : Security Advisory and Response

A vulnerability in the Linux kernel's USB core subsystem could allow local users to cause a denial of service or potentially have other impacts through a crafted USB device.

Understanding CVE-2017-17558

What is CVE-2017-17558?

The function usb_destroy_configuration in the Linux kernel's USB core subsystem fails to consider the maximum number of configurations and interfaces when releasing resources, leading to a vulnerability that can be exploited by local users.

The Impact of CVE-2017-17558

This vulnerability enables local users to cause a denial of service by gaining out-of-bounds write access or potentially creating other unspecified impacts through a maliciously crafted USB device.

Technical Details of CVE-2017-17558

Vulnerability Description

The usb_destroy_configuration function in the Linux kernel's USB core subsystem does not consider the maximum number of configurations and interfaces before releasing resources, allowing for a denial of service or other impacts.

Affected Systems and Versions

Product: n/a
Vendor: n/a
Versions: n/a

Exploitation Mechanism

The vulnerability can be exploited by local users through a crafted USB device to gain out-of-bounds write access, leading to a denial of service or other potential impacts.

Mitigation and Prevention

Immediate Steps to Take

Apply security patches provided by the Linux kernel maintainers.
Monitor for any unusual USB device behavior.
Limit physical access to systems to prevent unauthorized USB device connections.

Long-Term Security Practices

Regularly update the Linux kernel to the latest stable version.
Implement least privilege access controls to limit the impact of potential vulnerabilities.
Educate users on safe USB device usage practices.

Patching and Updates

Ensure that the Linux kernel is regularly updated with the latest security patches to mitigate the CVE-2017-17558 vulnerability.