CVE-2017-16538 : Security Advisory and Response

In the Linux kernel up to version 4.13.11, a vulnerability exists in the file "lmedm04.c" within the "drivers/media/usb/dvb-usb-v2" directory. This flaw allows local users to initiate a denial of service attack, resulting in a general protection fault and system crash. The issue stems from the lack of a warm-start check and incorrect attach timing between specific functions.

Understanding CVE-2017-16538

This CVE entry pertains to a vulnerability in the Linux kernel that can be exploited by local users to cause a denial of service or potentially trigger other unspecified impacts using a specially crafted USB device.

What is CVE-2017-16538?

This vulnerability in the Linux kernel through version 4.13.11 allows local users to trigger a denial of service (DoS) attack, leading to a system crash or other unspecified consequences by utilizing a specially crafted USB device.

The Impact of CVE-2017-16538

The vulnerability enables local users to cause a denial of service, resulting in a general protection fault and system crash. It may also have other unspecified impacts by exploiting a specially crafted USB device.

Technical Details of CVE-2017-16538

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The vulnerability is located in the file "lmedm04.c" within the "drivers/media/usb/dvb-usb-v2" directory in the Linux kernel up to version 4.13.11. It arises from the absence of a warm-start check and incorrect attach timing between specific functions.

Affected Systems and Versions

Affected System: Linux kernel up to version 4.13.11
Affected File: "lmedm04.c" in the "drivers/media/usb/dvb-usb-v2" directory

Exploitation Mechanism

The vulnerability can be exploited by local users through a specially crafted USB device, leveraging the absence of a warm-start check and incorrect attach timing between specific functions.

Mitigation and Prevention

Protecting systems from CVE-2017-16538 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply patches provided by the Linux kernel maintainers promptly.
Monitor vendor advisories and security mailing lists for updates.

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.
Conduct regular security assessments and audits to identify and address vulnerabilities.
Educate users on safe USB device usage to prevent exploitation.

Patching and Updates

Stay informed about security updates and patches released by the Linux kernel maintainers to address CVE-2017-16538.