CVE-2017-16535 : What You Need to Know

A vulnerability was found in the Linux kernel prior to version 4.13.10 which affects the usb_get_bos_descriptor function in drivers/usb/core/config.c. Local users can exploit this vulnerability by using a malicious USB device to trigger an out-of-bounds read and subsequent system crash, or potentially lead to other unspecified consequences.

Understanding CVE-2017-16535

This CVE entry describes a vulnerability in the Linux kernel that could be exploited by local users using a malicious USB device.

What is CVE-2017-16535?

The vulnerability in the usb_get_bos_descriptor function in the Linux kernel before version 4.13.10 allows local users to cause a denial of service (out-of-bounds read and system crash) or possibly have other unspecified impacts via a crafted USB device.

The Impact of CVE-2017-16535

Local users can trigger an out-of-bounds read and system crash by exploiting this vulnerability.
The consequences of this vulnerability may extend to other unspecified impacts on the system.

Technical Details of CVE-2017-16535

This section provides technical details about the vulnerability.

Vulnerability Description

The usb_get_bos_descriptor function in drivers/usb/core/config.c in the Linux kernel before 4.13.10 allows local users to cause a denial of service (out-of-bounds read and system crash) or possibly have unspecified other impact via a crafted USB device.

Affected Systems and Versions

Affected systems are those running Linux kernel versions prior to 4.13.10.
The specific affected component is the usb_get_bos_descriptor function in drivers/usb/core/config.c.

Exploitation Mechanism

Local users can exploit this vulnerability by using a malicious USB device to trigger an out-of-bounds read and subsequent system crash.

Mitigation and Prevention

Here are the steps to mitigate and prevent exploitation of CVE-2017-16535.

Immediate Steps to Take

Update the Linux kernel to version 4.13.10 or later to patch the vulnerability.
Avoid connecting untrusted USB devices to the system to minimize the risk of exploitation.

Long-Term Security Practices

Regularly update the system and kernel to ensure all security patches are applied promptly.
Implement strict USB device usage policies to prevent the connection of unknown or unverified devices.

Patching and Updates

Stay informed about security advisories and updates from Linux distributions and vendors to apply patches as soon as they are available.