In OpenStack Neutron before 28.0.2, the subnetpool onboarding API does not verify ownership of the target subnets. An authenticated user can onboard subnets from another project's shared network into their own subnetpool, mutating the victim's subnet state and altering L3 routing and address scope behavior for victim routers.

In OpenStack Neutron before 28.0.2, the subnetpool onboarding API does not verify ownership of the target subnets. An authenticated user can onboard subnets from another project's shared network into their own subnetpool, mutating the victim's subnet state and altering L3 routing and address scope behavior for victim routers.

Affected: Ubuntu:16.04:LTS: neutron, Ubuntu:18.04:LTS: neutron, Ubuntu:20.04:LTS: neutron, Ubuntu:22.04:LTS: neutron, Ubuntu:24.04:LTS: neutron, Ubuntu:26.04:LTS: neutron

In OpenStack Neutron before 28.0.2, the subnetpool onboarding API does not verify ownership of the target subnets. An authenticated user can onboard subnets from another project's shared network into their own subnetpool, mutating the victim's subnet state and altering L3 routing and address scope behavior for victim routers.

Ein Angreifer kann eine Schwachstelle in Red Hat OpenStack Neutron ausnutzen, um Daten zu manipulieren, und um Sicherheitsvorkehrungen zu umgehen.