CVE-2017-6348 : Security Advisory and Response

CVE-2017-6348 was published on March 1, 2017, with a vulnerability in the Linux kernel's hashbin_delete function. This flaw affects versions before 4.9.13 and can lead to a denial of service for IrDA devices due to improper lock management.

Understanding CVE-2017-6348

This CVE entry highlights a vulnerability in the Linux kernel that could be exploited by local users to cause a deadlock on IrDA devices.

What is CVE-2017-6348?

The hashbin_delete function in net/irda/irqueue.c in the Linux kernel before version 4.9.13 has a flaw in its lock management system. This vulnerability allows local users to trigger a denial of service (deadlock) on IrDA devices by executing specific crafted operations.

The Impact of CVE-2017-6348

The vulnerability can result in a denial of service condition, potentially disrupting the functionality of IrDA devices and affecting system availability.

Technical Details of CVE-2017-6348

This section provides more in-depth technical insights into the CVE.

Vulnerability Description

The hashbin_delete function in net/irda/irqueue.c in the Linux kernel before 4.9.13 improperly manages lock dropping, enabling local users to cause a denial of service (deadlock) through crafted operations on IrDA devices.

Affected Systems and Versions

The vulnerability impacts Linux kernel versions prior to 4.9.13.

Exploitation Mechanism

Local users can exploit the flaw by executing specific crafted operations on IrDA devices, leading to a deadlock scenario.

Mitigation and Prevention

Protecting systems from CVE-2017-6348 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update the Linux kernel to version 4.9.13 or newer to mitigate the vulnerability.
Monitor system logs for any unusual activities that could indicate exploitation.

Long-Term Security Practices

Implement the principle of least privilege to restrict user access and actions.
Regularly review and update security configurations to address potential vulnerabilities.

Patching and Updates

Stay informed about security advisories and patches released by the Linux kernel maintainers to address vulnerabilities like CVE-2017-6348.