CVE-2017-16534 : Exploit Details and Defense Strategies

In the Linux kernel prior to version 4.13.6, a vulnerability exists in the cdc_parse_cdc_header function that can be exploited by local users, potentially leading to a denial of service attack and system crash.

Understanding CVE-2017-16534

This CVE entry describes a flaw in the Linux kernel that could allow local users to trigger a denial of service attack through a specially crafted USB device.

What is CVE-2017-16534?

The vulnerability in the cdc_parse_cdc_header function in the Linux kernel before version 4.13.6 can be exploited by local users to cause a denial of service or other unspecified consequences by using a malicious USB device.

The Impact of CVE-2017-16534

The exploitation of this vulnerability can result in an out-of-bounds read and system crash, potentially leading to a denial of service condition. The attack could have additional unspecified consequences depending on the nature of the crafted USB device.

Technical Details of CVE-2017-16534

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

Vulnerability Description

The cdc_parse_cdc_header function in drivers/usb/core/message.c in the Linux kernel before 4.13.6 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 System: Linux kernel before version 4.13.6
Affected Component: cdc_parse_cdc_header function
Versions: All versions before 4.13.6

Exploitation Mechanism

The vulnerability can be exploited by local users using a specially crafted USB device to trigger the denial of service attack, leading to an out-of-bounds read and system crash.

Mitigation and Prevention

Protecting systems from CVE-2017-16534 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update the Linux kernel to version 4.13.6 or later to mitigate the vulnerability.
Monitor USB device connections for any suspicious activity.

Long-Term Security Practices

Implement least privilege access controls to limit the impact of potential attacks.
Regularly update and patch the Linux kernel and system components to address security vulnerabilities.
Educate users on safe USB device usage practices to prevent exploitation.
Consider implementing intrusion detection systems to detect and respond to potential attacks.

Patching and Updates

Ensure timely patching and updates of the Linux kernel to the latest version to address the vulnerability and enhance system security.