When using the Linux bridge ml2 driver, non-privileged tenants are able to create and attach ports without specifying an IP address, bypassing IP address validation. A potential denial of service could occur if an IP address, conflicting with existing guests or routers, is then assigned from outside of the allowed allocation pool. Versions of openstack-neutron before 13.0.0.0b2, 12.0.3 and 11.0.5 are vulnerable.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - When using the Linux bridge ml2 driver, non-privileged tenants are able to create and attach ports without     specifying an IP address, bypassing IP address validation. A potential denial of service could occur if an     IP address, conflicting with existing guests or routers, is then assigned from outside of the allowed     allocation pool. Versions of openstack-neutron before 13.0.0.0b2, 12.0.3 and 11.0.5 are vulnerable.
    (CVE-2018-14635)

Note that Nessus relies on the presence of the package as reported by the vendor.

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2018:2715 advisory.

    OpenStack Networking (neutron) is a pluggable, scalable, and API-driven system that provisions networking     services to virtual machines. Its main function is to manage connectivity to and from virtual machines.

    Security Fix(es):

    * openstack-neutron: A router interface out of subnet IP range results in a denial of service     (CVE-2018-14635)

    For more details about the security issue, including the impact, a CVSS score, and other related     information, refer to the CVE page listed in the References section.

    Bug Fix(es):

    * A new configuration option bridge_mac_table_size has been added for the neutron OVS agent. This value is     set on every Open vSwitch bridge managed by the openvswitch-neutron-agent. The value controls the maximum     number of MAC addresses that can be learned on a bridge. The default value for this new option is 50,000,     which should be enough for most systems. Values outside a reasonable range (10 to 1,000,000) might be     overridden by Open vSwitch. (BZ#1589031)

    * Previously, when a VM was destroyed, the IPv6 lease was not removed from dnsmasq lease files due to a     missing dhcp_release6 binary.

    With this update, the dhcp_release6 binary is now provided in an updated dnsmasq-utils package version.
    (BZ#1545006)

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2018:3792 advisory.

    OpenStack Networking (neutron) is a pluggable, scalable, and API-driven system that provisions networking     services to virtual machines. Its main function is to manage connectivity to and from virtual machines.

    Security Fix(es):

    * openstack-neutron: A router interface out of subnet IP range results in a denial of service     (CVE-2018-14635)

    For more details about the security issues, including the impact, a CVSS score, acknowledgments, and other     related information, refer to the CVE pages listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
252669	Linux Distros Unpatched Vulnerability : CVE-2018-14635	Nessus	Misc.	medium
210321	RHEL 7 : openstack-neutron (RHSA-2018:2715)	Nessus	Red Hat Local Security Checks	medium
194007	RHEL 7 : openstack-neutron (RHSA-2018:3792)	Nessus	Red Hat Local Security Checks	medium

Detections

Analytics

CVE-2018-14635

high

Tenable Plugins

medium

medium

medium