An issue was discovered in OpenStack Neutron before 16.4.1, 17.x before 17.2.1, and 18.x before 18.1.1. Authenticated attackers can reconfigure dnsmasq via a crafted extra_dhcp_opts value.

The remote Ubuntu 18.04 LTS / 20.04 LTS / 22.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-6067-1 advisory.

  - A flaw was found in openstack-neutron's default Open vSwitch firewall rules. By sending carefully crafted     packets, anyone in control of a server instance connected to the virtual switch can impersonate the IPv6     addresses of other systems on the network, resulting in denial of service or in some cases possibly     interception of traffic intended for other destinations. Only deployments using the Open vSwitch driver     are affected. Source: OpenStack project. Versions before openstack-neutron 15.3.3, openstack-neutron     16.3.1 and openstack-neutron 17.1.1 are affected. (CVE-2021-20267)

  - OpenStack Neutron before 16.4.1, 17.x before 17.1.3, and 18.0.0 allows hardware address impersonation when     the linuxbridge driver with ebtables-nft is used on a Netfilter-based platform. By sending carefully     crafted packets, anyone in control of a server instance connected to the virtual switch can impersonate     the hardware addresses of other systems on the network, resulting in denial of service or in some cases     possibly interception of traffic intended for other destinations. (CVE-2021-38598)

  - An issue was discovered in OpenStack Neutron before 16.4.1, 17.x before 17.2.1, and 18.x before 18.1.1.
    Authenticated attackers can reconfigure dnsmasq via a crafted extra_dhcp_opts value. (CVE-2021-40085)

  - An issue was discovered in the routes middleware in OpenStack Neutron before 16.4.1, 17.x before 17.2.1,     and 18.x before 18.1.1. By making API requests involving nonexistent controllers, an authenticated user     may cause the API worker to consume increasing amounts of memory, resulting in API performance degradation     or denial of service. (CVE-2021-40797)

  - An uncontrolled resource consumption flaw was found in openstack-neutron. This flaw allows a remote     authenticated user to query a list of security groups for an invalid project. This issue creates resources     that are unconstrained by the user's quota. If a malicious user were to submit a significant number of     requests, this could lead to a denial of service. (CVE-2022-3277)

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

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2021:3481 advisory.

  - openstack-neutron: arbitrary dnsmasq reconfiguration via extra_dhcp_opts (CVE-2021-40085)

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 8 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2021:3488 advisory.

  - openstack-neutron: arbitrary dnsmasq reconfiguration via extra_dhcp_opts (CVE-2021-40085)

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-2021:3503 advisory.

  - openstack-neutron: arbitrary dnsmasq reconfiguration via extra_dhcp_opts (CVE-2021-40085)

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-2021:3502 advisory.

  - openstack-neutron: arbitrary dnsmasq reconfiguration via extra_dhcp_opts (CVE-2021-40085)

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

The remote Debian 9 host has packages installed that are affected by a vulnerability as referenced in the dla-2781 advisory.

  - An issue was discovered in OpenStack Neutron before 16.4.1, 17.x before 17.2.1, and 18.x before 18.1.1.
    Authenticated attackers can reconfigure dnsmasq via a crafted extra_dhcp_opts value. (CVE-2021-40085)

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

The remote Debian 10 / 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-4983 advisory.

  - A flaw was found in openstack-neutron's default Open vSwitch firewall rules. By sending carefully crafted     packets, anyone in control of a server instance connected to the virtual switch can impersonate the IPv6     addresses of other systems on the network, resulting in denial of service or in some cases possibly     interception of traffic intended for other destinations. Only deployments using the Open vSwitch driver     are affected. Source: OpenStack project. Versions before openstack-neutron 15.3.3, openstack-neutron     16.3.1 and openstack-neutron 17.1.1 are affected. (CVE-2021-20267)

  - OpenStack Neutron before 16.4.1, 17.x before 17.1.3, and 18.0.0 allows hardware address impersonation when     the linuxbridge driver with ebtables-nft is used on a Netfilter-based platform. By sending carefully     crafted packets, anyone in control of a server instance connected to the virtual switch can impersonate     the hardware addresses of other systems on the network, resulting in denial of service or in some cases     possibly interception of traffic intended for other destinations. (CVE-2021-38598)

  - An issue was discovered in OpenStack Neutron before 16.4.1, 17.x before 17.2.1, and 18.x before 18.1.1.
    Authenticated attackers can reconfigure dnsmasq via a crafted extra_dhcp_opts value. (CVE-2021-40085)

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
175565	Ubuntu 18.04 LTS / 20.04 LTS / 22.04 LTS : OpenStack Neutron vulnerabilities (USN-6067-1)	Nessus	Ubuntu Local Security Checks	critical
165163	RHEL 8 : Red Hat OpenStack Platform 16.1 (openstack-neutron) (RHSA-2021:3481)	Nessus	Red Hat Local Security Checks	medium
165156	RHEL 8 : Red Hat OpenStack Platform 16.2 (openstack-neutron) (RHSA-2021:3488)	Nessus	Red Hat Local Security Checks	medium
165151	RHEL 7 : Red Hat OpenStack Platform 13.0 (openstack-neutron) (RHSA-2021:3503)	Nessus	Red Hat Local Security Checks	medium
165120	RHEL 7 : Red Hat OpenStack Platform 10.0 (openstack-neutron) (RHSA-2021:3502)	Nessus	Red Hat Local Security Checks	medium
153994	Debian DLA-2781-1 : neutron - LTS security update	Nessus	Debian Local Security Checks	medium
153993	Debian DSA-4983-1 : neutron - security update	Nessus	Debian Local Security Checks	critical

Detections

Analytics

CVE-2021-40085

medium

Tenable Plugins

critical

medium

medium

medium

medium

medium

critical