CVE-2017-5985 : What You Need to Know

Linux Containers (LXC) vulnerability allowing local users to create network interfaces on the host machine.

Understanding CVE-2017-5985

A security flaw in the lxc-user-nic feature of Linux Containers (LXC) that permits local users to generate network interfaces on the host machine.

What is CVE-2017-5985?

The vulnerability in lxc-user-nic in LXC allows users with lxc-usernet allocation to create network interfaces on the host and name them without netns ownership verification.

The Impact of CVE-2017-5985

Local users can exploit the vulnerability to create network interfaces on the host machine.
Attackers can potentially escalate privileges and perform unauthorized actions on the system.

Technical Details of CVE-2017-5985

A closer look at the technical aspects of the CVE.

Vulnerability Description

The flaw in lxc-user-nic enables users to create network interfaces on the host.

Affected Systems and Versions

Product: Linux Containers (LXC)
Vendor: N/A
Version: N/A

Exploitation Mechanism

Local users with lxc-usernet allocation can take advantage of the lack of netns ownership verification to create network interfaces.

Mitigation and Prevention

Protecting systems from the CVE-2017-5985 vulnerability.

Immediate Steps to Take

Apply patches provided by the vendor to address the vulnerability.
Restrict access and permissions for local users to minimize the risk of exploitation.

Long-Term Security Practices

Regularly update and patch the system to prevent known vulnerabilities.
Implement the principle of least privilege to limit user capabilities.
Monitor network activity for any suspicious behavior.

Patching and Updates

Stay informed about security updates and apply them promptly to mitigate risks.