CVE-2018-14635 : What You Need to Know

A vulnerability in openstack-neutron allows non-privileged tenants to create and connect ports without specifying an IP address, potentially leading to denial of service attacks.

Understanding CVE-2018-14635

This CVE affects openstack-neutron versions prior to 13.0.0.0b2, 12.0.3, and 11.0.5.

What is CVE-2018-14635?

When using the Linux bridge ml2 driver, non-privileged tenants can create and attach ports without specifying an IP address, bypassing IP address validation. This could result in a denial of service if conflicting IP addresses are assigned.

The Impact of CVE-2018-14635

CVSS Base Score: 6.5 (Medium)
Attack Vector: Network
Availability Impact: High
Privileges Required: Low
Scope: Unchanged
No Confidentiality or Integrity Impact

Technical Details of CVE-2018-14635

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

Vulnerability Description

The vulnerability allows non-privileged tenants to create and connect ports without specifying an IP address, potentially leading to denial of service attacks.

Affected Systems and Versions

Affected Product: openstack-neutron
Vendor: The Openstack Project
Vulnerable Versions: 13.0.0.0b2, 12.0.3, 11.0.5

Exploitation Mechanism

The exploitation involves bypassing the IP address validation process, allowing the creation of conflicting IP addresses that may lead to denial of service.

Mitigation and Prevention

Protecting systems from CVE-2018-14635 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update openstack-neutron to a non-vulnerable version.
Implement network segmentation to limit the impact of potential denial of service attacks.

Long-Term Security Practices

Regularly monitor and audit network configurations.
Educate users on secure network practices to prevent unauthorized port connections.

Patching and Updates

Apply patches provided by The Openstack Project to address the vulnerability.