# CVE-2021-38598: neutron-common: OpenStack Neutron before 16.4.1, 17.x before 17.1.3, and 18.0.0 allows hardware address impersonation when the linuxb...

CVE-2021-38598 is fixed in 17 products on 1 platform, first by neutron-common 2:12.1.1-0ubuntu8.1, released March 6, 2023. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2021-38598
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: 0.0122
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Aug 22, 2021

## Description

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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | neutron-common Ubuntu 18.04.6 LTS (bionic) | 2:12.1.1-0ubuntu8.1 | [neutron-common 2:12.1.1-0ubuntu8.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-neutron-common-2-12.1.1-0ubuntu8.1.md) | Mar 6, 2023 |
| Linux | neutron-common Ubuntu 20.04 LTS (focal) | 2:16.4.2-0ubuntu6.2 | [neutron-common 2:16.4.2-0ubuntu6.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-neutron-common-2-16.4.2-0ubuntu6.2.md) | Mar 6, 2023 |
| Linux | neutron-dhcp-agent Ubuntu 18.04.6 LTS (bionic) | 2:12.1.1-0ubuntu8.1 | [neutron-dhcp-agent 2:12.1.1-0ubuntu8.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-neutron-dhcp-agent-2-12.1.1-0ubuntu8.1.md) | Mar 6, 2023 |
| Linux | neutron-dhcp-agent Ubuntu 20.04 LTS (focal) | 2:16.4.2-0ubuntu6.2 | [neutron-dhcp-agent 2:16.4.2-0ubuntu6.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-neutron-dhcp-agent-2-16.4.2-0ubuntu6.2.md) | Mar 6, 2023 |
| Linux | neutron-l3-agent Ubuntu 18.04.6 LTS (bionic) | 2:12.1.1-0ubuntu8.1 | [neutron-l3-agent 2:12.1.1-0ubuntu8.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-neutron-l3-agent-2-12.1.1-0ubuntu8.1.md) | Mar 6, 2023 |
| Linux | neutron-l3-agent Ubuntu 20.04 LTS (focal) | 2:16.4.2-0ubuntu6.2 | [neutron-l3-agent 2:16.4.2-0ubuntu6.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-neutron-l3-agent-2-16.4.2-0ubuntu6.2.md) | Mar 6, 2023 |
| Linux | neutron-linuxbridge-agent Ubuntu 18.04.6 LTS (bionic) | 2:12.1.1-0ubuntu8.1 | [neutron-linuxbridge-agent 2:12.1.1-0ubuntu8.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-neutron-linuxbridge-agent-2-12.1.1-0ubuntu8.1.md) | Mar 6, 2023 |
| Linux | neutron-linuxbridge-agent Ubuntu 20.04 LTS (focal) | 2:16.4.2-0ubuntu6.2 | [neutron-linuxbridge-agent 2:16.4.2-0ubuntu6.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-neutron-linuxbridge-agent-2-16.4.2-0ubuntu6.2.md) | Mar 6, 2023 |
| Linux | neutron-macvtap-agent Ubuntu 18.04.6 LTS (bionic) | 2:12.1.1-0ubuntu8.1 | [neutron-macvtap-agent 2:12.1.1-0ubuntu8.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-neutron-macvtap-agent-2-12.1.1-0ubuntu8.1.md) | Mar 6, 2023 |
| Linux | neutron-macvtap-agent Ubuntu 20.04 LTS (focal) | 2:16.4.2-0ubuntu6.2 | [neutron-macvtap-agent 2:16.4.2-0ubuntu6.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-neutron-macvtap-agent-2-16.4.2-0ubuntu6.2.md) | Mar 6, 2023 |
| Linux | neutron-metadata-agent Ubuntu 18.04.6 LTS (bionic) | 2:12.1.1-0ubuntu8.1 | [neutron-metadata-agent 2:12.1.1-0ubuntu8.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-neutron-metadata-agent-2-12.1.1-0ubuntu8.1.md) | Mar 6, 2023 |
| Linux | neutron-metadata-agent Ubuntu 20.04 LTS (focal) | 2:16.4.2-0ubuntu6.2 | [neutron-metadata-agent 2:16.4.2-0ubuntu6.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-neutron-metadata-agent-2-16.4.2-0ubuntu6.2.md) | Mar 6, 2023 |
| Linux | neutron-metering-agent Ubuntu 18.04.6 LTS (bionic) | 2:12.1.1-0ubuntu8.1 | [neutron-metering-agent 2:12.1.1-0ubuntu8.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-neutron-metering-agent-2-12.1.1-0ubuntu8.1.md) | Mar 6, 2023 |
| Linux | neutron-metering-agent Ubuntu 20.04 LTS (focal) | 2:16.4.2-0ubuntu6.2 | [neutron-metering-agent 2:16.4.2-0ubuntu6.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-neutron-metering-agent-2-16.4.2-0ubuntu6.2.md) | Mar 6, 2023 |
| Linux | neutron-openvswitch-agent Ubuntu 18.04.6 LTS (bionic) | 2:12.1.1-0ubuntu8.1 | [neutron-openvswitch-agent 2:12.1.1-0ubuntu8.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-neutron-openvswitch-agent-2-12.1.1-0ubuntu8.1.md) | Mar 6, 2023 |
| Linux | neutron-openvswitch-agent Ubuntu 20.04 LTS (focal) | 2:16.4.2-0ubuntu6.2 | [neutron-openvswitch-agent 2:16.4.2-0ubuntu6.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-neutron-openvswitch-agent-2-16.4.2-0ubuntu6.2.md) | Mar 6, 2023 |
| Linux | neutron-ovn-metadata-agent Ubuntu 20.04 LTS (focal) | 2:16.4.2-0ubuntu6.2 | [neutron-ovn-metadata-agent 2:16.4.2-0ubuntu6.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-neutron-ovn-metadata-agent-2-16.4.2-0ubuntu6.2.md) | Mar 6, 2023 |
| Linux | neutron-plugin-linuxbridge-agent Ubuntu 18.04.6 LTS (bionic) | 2:12.1.1-0ubuntu8.1 | [neutron-plugin-linuxbridge-agent 2:12.1.1-0ubuntu8.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-neutron-plugin-linuxbridge-agent-2-12.1.1-0ubuntu8.1.md) | Mar 6, 2023 |
| Linux | neutron-plugin-ml2 Ubuntu 18.04.6 LTS (bionic) | 2:12.1.1-0ubuntu8.1 | [neutron-plugin-ml2 2:12.1.1-0ubuntu8.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-neutron-plugin-ml2-2-12.1.1-0ubuntu8.1.md) | Mar 6, 2023 |
| Linux | neutron-plugin-ml2 Ubuntu 20.04 LTS (focal) | 2:16.4.2-0ubuntu6.2 | [neutron-plugin-ml2 2:16.4.2-0ubuntu6.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-neutron-plugin-ml2-2-16.4.2-0ubuntu6.2.md) | Mar 6, 2023 |
| Linux | neutron-plugin-openvswitch-agent Ubuntu 18.04.6 LTS (bionic) | 2:12.1.1-0ubuntu8.1 | [neutron-plugin-openvswitch-agent 2:12.1.1-0ubuntu8.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-neutron-plugin-openvswitch-agent-2-12.1.1-0ubuntu8.1.md) | Mar 6, 2023 |
| Linux | neutron-plugin-sriov-agent Ubuntu 18.04.6 LTS (bionic) | 2:12.1.1-0ubuntu8.1 | [neutron-plugin-sriov-agent 2:12.1.1-0ubuntu8.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-neutron-plugin-sriov-agent-2-12.1.1-0ubuntu8.1.md) | Mar 6, 2023 |
| Linux | neutron-server Ubuntu 18.04.6 LTS (bionic) | 2:12.1.1-0ubuntu8.1 | [neutron-server 2:12.1.1-0ubuntu8.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-neutron-server-2-12.1.1-0ubuntu8.1.md) | Mar 6, 2023 |
| Linux | neutron-server Ubuntu 20.04 LTS (focal) | 2:16.4.2-0ubuntu6.2 | [neutron-server 2:16.4.2-0ubuntu6.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-neutron-server-2-16.4.2-0ubuntu6.2.md) | Mar 6, 2023 |
| Linux | neutron-sriov-agent Ubuntu 18.04.6 LTS (bionic) | 2:12.1.1-0ubuntu8.1 | [neutron-sriov-agent 2:12.1.1-0ubuntu8.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-neutron-sriov-agent-2-12.1.1-0ubuntu8.1.md) | Mar 6, 2023 |
| Linux | neutron-sriov-agent Ubuntu 20.04 LTS (focal) | 2:16.4.2-0ubuntu6.2 | [neutron-sriov-agent 2:16.4.2-0ubuntu6.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-neutron-sriov-agent-2-16.4.2-0ubuntu6.2.md) | Mar 6, 2023 |
| Linux | python-neutron Ubuntu 18.04.6 LTS (bionic) | 2:12.1.1-0ubuntu8.1 | [python-neutron 2:12.1.1-0ubuntu8.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-python-neutron-2-12.1.1-0ubuntu8.1.md) | Mar 6, 2023 |
| Linux | python3-neutron Ubuntu 20.04 LTS (focal) | 2:16.4.2-0ubuntu6.2 | [python3-neutron 2:16.4.2-0ubuntu6.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-python3-neutron-2-16.4.2-0ubuntu6.2.md) | Mar 6, 2023 |

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