Vulnerability-Lookup

UBUNTU-CVE-2021-20267 (CVE-2021-20267)

Vulnerability from osv_ubuntu – Published: 2021-05-28 19:15 – Updated: 2025-10-24 04:50 – Source website

Details

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.

Severity

7.1 (High)


                    
                      CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2021-20267	REPORT
	https://review.opendev.org/c/openstack/neutron/+/776599	REPORT
	https://ubuntu.com/security/notices/USN-6067-1	ADVISORY
	https://www.cve.org/CVERecord?id=CVE-2021-20267	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "neutron-bgp-dragent",
            "binary_version": "2:8.4.0-0ubuntu7.5"
          },
          {
            "binary_name": "neutron-common",
            "binary_version": "2:8.4.0-0ubuntu7.5"
          },
          {
            "binary_name": "neutron-dhcp-agent",
            "binary_version": "2:8.4.0-0ubuntu7.5"
          },
          {
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            "binary_version": "2:8.4.0-0ubuntu7.5"
          },
          {
            "binary_name": "neutron-linuxbridge-agent",
            "binary_version": "2:8.4.0-0ubuntu7.5"
          },
          {
            "binary_name": "neutron-macvtap-agent",
            "binary_version": "2:8.4.0-0ubuntu7.5"
          },
          {
            "binary_name": "neutron-metadata-agent",
            "binary_version": "2:8.4.0-0ubuntu7.5"
          },
          {
            "binary_name": "neutron-metering-agent",
            "binary_version": "2:8.4.0-0ubuntu7.5"
          },
          {
            "binary_name": "neutron-openvswitch-agent",
            "binary_version": "2:8.4.0-0ubuntu7.5"
          },
          {
            "binary_name": "neutron-plugin-linuxbridge-agent",
            "binary_version": "2:8.4.0-0ubuntu7.5"
          },
          {
            "binary_name": "neutron-plugin-ml2",
            "binary_version": "2:8.4.0-0ubuntu7.5"
          },
          {
            "binary_name": "neutron-plugin-openvswitch-agent",
            "binary_version": "2:8.4.0-0ubuntu7.5"
          },
          {
            "binary_name": "neutron-plugin-sriov-agent",
            "binary_version": "2:8.4.0-0ubuntu7.5"
          },
          {
            "binary_name": "neutron-server",
            "binary_version": "2:8.4.0-0ubuntu7.5"
          },
          {
            "binary_name": "neutron-sriov-agent",
            "binary_version": "2:8.4.0-0ubuntu7.5"
          },
          {
            "binary_name": "python-neutron",
            "binary_version": "2:8.4.0-0ubuntu7.5"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "neutron",
        "purl": "pkg:deb/ubuntu/neutron@2:8.4.0-0ubuntu7.5?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2:7.0.0-0ubuntu1",
        "2:8.0.0~b1-0ubuntu2",
        "2:8.0.0~b2-0ubuntu4",
        "2:8.0.0~b2-0ubuntu5",
        "2:8.0.0~b2-0ubuntu7",
        "2:8.0.0~b3-0ubuntu1",
        "2:8.0.0~rc1-0ubuntu1",
        "2:8.0.0-0ubuntu1",
        "2:8.1.0-0ubuntu0.16.04.2",
        "2:8.1.2-0ubuntu1",
        "2:8.2.0-0ubuntu1",
        "2:8.3.0-0ubuntu1",
        "2:8.3.0-0ubuntu1.1",
        "2:8.3.0-0ubuntu1.2",
        "2:8.4.0-0ubuntu1",
        "2:8.4.0-0ubuntu2",
        "2:8.4.0-0ubuntu3",
        "2:8.4.0-0ubuntu4",
        "2:8.4.0-0ubuntu5",
        "2:8.4.0-0ubuntu6",
        "2:8.4.0-0ubuntu7.1",
        "2:8.4.0-0ubuntu7.2",
        "2:8.4.0-0ubuntu7.3",
        "2:8.4.0-0ubuntu7.4",
        "2:8.4.0-0ubuntu7.5"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "neutron-common",
            "binary_version": "2:12.1.1-0ubuntu8.1"
          },
          {
            "binary_name": "neutron-dhcp-agent",
            "binary_version": "2:12.1.1-0ubuntu8.1"
          },
          {
            "binary_name": "neutron-l3-agent",
            "binary_version": "2:12.1.1-0ubuntu8.1"
          },
          {
            "binary_name": "neutron-linuxbridge-agent",
            "binary_version": "2:12.1.1-0ubuntu8.1"
          },
          {
            "binary_name": "neutron-macvtap-agent",
            "binary_version": "2:12.1.1-0ubuntu8.1"
          },
          {
            "binary_name": "neutron-metadata-agent",
            "binary_version": "2:12.1.1-0ubuntu8.1"
          },
          {
            "binary_name": "neutron-metering-agent",
            "binary_version": "2:12.1.1-0ubuntu8.1"
          },
          {
            "binary_name": "neutron-openvswitch-agent",
            "binary_version": "2:12.1.1-0ubuntu8.1"
          },
          {
            "binary_name": "neutron-plugin-linuxbridge-agent",
            "binary_version": "2:12.1.1-0ubuntu8.1"
          },
          {
            "binary_name": "neutron-plugin-ml2",
            "binary_version": "2:12.1.1-0ubuntu8.1"
          },
          {
            "binary_name": "neutron-plugin-openvswitch-agent",
            "binary_version": "2:12.1.1-0ubuntu8.1"
          },
          {
            "binary_name": "neutron-plugin-sriov-agent",
            "binary_version": "2:12.1.1-0ubuntu8.1"
          },
          {
            "binary_name": "neutron-server",
            "binary_version": "2:12.1.1-0ubuntu8.1"
          },
          {
            "binary_name": "neutron-sriov-agent",
            "binary_version": "2:12.1.1-0ubuntu8.1"
          },
          {
            "binary_name": "python-neutron",
            "binary_version": "2:12.1.1-0ubuntu8.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "neutron",
        "purl": "pkg:deb/ubuntu/neutron@2:12.1.1-0ubuntu8.1?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2:12.1.1-0ubuntu8.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2:11.0.1-0ubuntu1",
        "2:12.0.0~b1-0ubuntu1",
        "2:12.0.0~b1-0ubuntu2",
        "2:12.0.0~b2-0ubuntu1",
        "2:12.0.0~b3-0ubuntu1",
        "2:12.0.0~rc1-0ubuntu1",
        "2:12.0.0~rc2-0ubuntu1",
        "2:12.0.0-0ubuntu1",
        "2:12.0.0-0ubuntu1.1",
        "2:12.0.0-0ubuntu1.2",
        "2:12.0.0-0ubuntu1.3",
        "2:12.0.0-0ubuntu1.4",
        "2:12.0.0-0ubuntu2",
        "2:12.0.0-0ubuntu3",
        "2:12.0.1-0ubuntu1",
        "2:12.0.1-0ubuntu1.1",
        "2:12.0.2-0ubuntu1",
        "2:12.0.3-0ubuntu1",
        "2:12.0.5-0ubuntu1",
        "2:12.0.5-0ubuntu4",
        "2:12.0.5-0ubuntu5",
        "2:12.0.6-0ubuntu1",
        "2:12.0.6-0ubuntu2",
        "2:12.0.6-0ubuntu3",
        "2:12.1.0-0ubuntu1",
        "2:12.1.1-0ubuntu1",
        "2:12.1.1-0ubuntu2",
        "2:12.1.1-0ubuntu3",
        "2:12.1.1-0ubuntu4",
        "2:12.1.1-0ubuntu7",
        "2:12.1.1-0ubuntu8"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "neutron-common",
            "binary_version": "2:16.4.2-0ubuntu6.2"
          },
          {
            "binary_name": "neutron-dhcp-agent",
            "binary_version": "2:16.4.2-0ubuntu6.2"
          },
          {
            "binary_name": "neutron-l3-agent",
            "binary_version": "2:16.4.2-0ubuntu6.2"
          },
          {
            "binary_name": "neutron-linuxbridge-agent",
            "binary_version": "2:16.4.2-0ubuntu6.2"
          },
          {
            "binary_name": "neutron-macvtap-agent",
            "binary_version": "2:16.4.2-0ubuntu6.2"
          },
          {
            "binary_name": "neutron-metadata-agent",
            "binary_version": "2:16.4.2-0ubuntu6.2"
          },
          {
            "binary_name": "neutron-metering-agent",
            "binary_version": "2:16.4.2-0ubuntu6.2"
          },
          {
            "binary_name": "neutron-openvswitch-agent",
            "binary_version": "2:16.4.2-0ubuntu6.2"
          },
          {
            "binary_name": "neutron-ovn-metadata-agent",
            "binary_version": "2:16.4.2-0ubuntu6.2"
          },
          {
            "binary_name": "neutron-plugin-ml2",
            "binary_version": "2:16.4.2-0ubuntu6.2"
          },
          {
            "binary_name": "neutron-server",
            "binary_version": "2:16.4.2-0ubuntu6.2"
          },
          {
            "binary_name": "neutron-sriov-agent",
            "binary_version": "2:16.4.2-0ubuntu6.2"
          },
          {
            "binary_name": "python3-neutron",
            "binary_version": "2:16.4.2-0ubuntu6.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "neutron",
        "purl": "pkg:deb/ubuntu/neutron@2:16.4.2-0ubuntu6.2?arch=source\u0026distro=focal"
      },
      "ranges": [
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          "events": [
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            },
            {
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            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2:15.0.0-0ubuntu1",
        "2:16.0.0~b1~git2019121613.3e8abb9a8f-0ubuntu1",
        "2:16.0.0~b2~git2020020712.d5b33ffc77-0ubuntu1",
        "2:16.0.0~b2~git2020020712.d5b33ffc77-0ubuntu3",
        "2:16.0.0~b3~git2020032420.a0e1b5804e-0ubuntu1",
        "2:16.0.0~b3~git2020032420.a0e1b5804e-0ubuntu2",
        "2:16.0.0~b3~git2020032420.a0e1b5804e-0ubuntu3",
        "2:16.0.0~b3~git2020032420.a0e1b5804e-0ubuntu4",
        "2:16.0.0~b3~git2020041013.e74c8f8c88-0ubuntu1",
        "2:16.0.0~b3~git2020041516.5f42488a9a-0ubuntu1",
        "2:16.0.0~b3~git2020041516.5f42488a9a-0ubuntu2",
        "2:16.0.0-0ubuntu0.20.04.1",
        "2:16.0.0-0ubuntu0.20.04.2",
        "2:16.1.0-0ubuntu1",
        "2:16.1.0-0ubuntu2",
        "2:16.2.0-0ubuntu1",
        "2:16.2.0-0ubuntu2",
        "2:16.2.0-0ubuntu3",
        "2:16.3.0-0ubuntu3",
        "2:16.3.1-0ubuntu1",
        "2:16.3.1-0ubuntu1.1",
        "2:16.3.2-0ubuntu2",
        "2:16.3.2-0ubuntu3",
        "2:16.4.0-0ubuntu2",
        "2:16.4.0-0ubuntu3",
        "2:16.4.1-0ubuntu2",
        "2:16.4.2-0ubuntu1",
        "2:16.4.2-0ubuntu2",
        "2:16.4.2-0ubuntu3",
        "2:16.4.2-0ubuntu4",
        "2:16.4.2-0ubuntu5",
        "2:16.4.2-0ubuntu6",
        "2:16.4.2-0ubuntu6.1"
      ]
    }
  ],
  "aliases": [],
  "details": "A flaw was found in openstack-neutron\u0027s 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.",
  "id": "UBUNTU-CVE-2021-20267",
  "modified": "2025-10-24T04:50:05Z",
  "published": "2021-05-28T19:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-20267"
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      "url": "https://review.opendev.org/c/openstack/neutron/+/776599"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-6067-1"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2021-20267"
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  "schema_version": "1.7.0",
  "severity": [
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      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2021-20267"
  ]
}

CVE-2021-20267 (GCVE-0-2021-20267)

Vulnerability from cvelistv5 – Published: 2021-05-28 18:46 – Updated: 2024-08-03 17:37

Summary

Severity

No CVSS data available.

CWE

CWE-345

Assigner

redhat redhat root

References

2 references

URL	Tags
https://bugzilla.redhat.com/show_bug.cgi?id=1934330	x_refsource_MISC
https://security.openstack.org/ossa/OSSA-2021-001.html	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version
n/a	openstack-neutron	Affected: openstack-neutron 15.3.3, openstack-neutron 16.3.1, openstack-neutron 17.1.1

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
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    "cna": {
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USN-6067-1 (UBUNTU-CVE-2021-20267)

Vulnerability from osv_ubuntu – Published: 2023-05-10 11:30 – Updated: 2026-04-27 14:11 – Source website

Summary

neutron vulnerabilities

Details

David Sinquin discovered that OpenStack Neutron incorrectly handled the default Open vSwitch firewall rules. An attacker could possibly use this issue to impersonate the IPv6 addresses of other systems on the network. This issue only affected Ubuntu 18.04 LTS, and Ubuntu 20.04 LTS. (CVE-2021-20267)

Jake Yip and Justin Mammarella discovered that OpenStack Neutron incorrectly handled the linuxbridge driver when ebtables-nft is being used. An attacker could possibly use this issue to impersonate the hardware addresss of other systems on the network. This issue only affected Ubuntu 18.04 LTS, and Ubuntu 20.04 LTS. (CVE-2021-38598)

Pavel Toporkov discovered that OpenStack Neutron incorrectly handled extra_dhcp_opts values. An attacker could possibly use this issue to reconfigure dnsmasq. This issue only affected Ubuntu 18.04 LTS, and Ubuntu 20.04 LTS. (CVE-2021-40085)

Slawek Kaplonski discovered that OpenStack Neutron incorrectly handled the routes middleware. An attacker could possibly use this issue to cause the API worker to consume memory, leading to a denial of service. This issue only affected Ubuntu 18.04 LTS, and Ubuntu 20.04 LTS. (CVE-2021-40797)

It was discovered that OpenStack Neutron incorrectly handled certain queries. A remote authenticated user could possibly use this issue to cause resource consumption, leading to a denial of service. (CVE-2022-3277)

References

URL

Type

	https://ubuntu.com/security/notices/USN-6067-1	ADVISORY
	https://ubuntu.com/security/CVE-2021-20267	REPORT
	https://ubuntu.com/security/CVE-2021-38598	REPORT
	https://ubuntu.com/security/CVE-2021-40085	REPORT
	https://ubuntu.com/security/CVE-2021-40797	REPORT
	https://ubuntu.com/security/CVE-2022-3277	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2021-20267",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-38598",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-40085",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-40797",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2022-3277",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:18.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "neutron-common",
            "binary_version": "2:12.1.1-0ubuntu8.1"
          },
          {
            "binary_name": "neutron-dhcp-agent",
            "binary_version": "2:12.1.1-0ubuntu8.1"
          },
          {
            "binary_name": "neutron-l3-agent",
            "binary_version": "2:12.1.1-0ubuntu8.1"
          },
          {
            "binary_name": "neutron-linuxbridge-agent",
            "binary_version": "2:12.1.1-0ubuntu8.1"
          },
          {
            "binary_name": "neutron-macvtap-agent",
            "binary_version": "2:12.1.1-0ubuntu8.1"
          },
          {
            "binary_name": "neutron-metadata-agent",
            "binary_version": "2:12.1.1-0ubuntu8.1"
          },
          {
            "binary_name": "neutron-metering-agent",
            "binary_version": "2:12.1.1-0ubuntu8.1"
          },
          {
            "binary_name": "neutron-openvswitch-agent",
            "binary_version": "2:12.1.1-0ubuntu8.1"
          },
          {
            "binary_name": "neutron-plugin-linuxbridge-agent",
            "binary_version": "2:12.1.1-0ubuntu8.1"
          },
          {
            "binary_name": "neutron-plugin-ml2",
            "binary_version": "2:12.1.1-0ubuntu8.1"
          },
          {
            "binary_name": "neutron-plugin-openvswitch-agent",
            "binary_version": "2:12.1.1-0ubuntu8.1"
          },
          {
            "binary_name": "neutron-plugin-sriov-agent",
            "binary_version": "2:12.1.1-0ubuntu8.1"
          },
          {
            "binary_name": "neutron-server",
            "binary_version": "2:12.1.1-0ubuntu8.1"
          },
          {
            "binary_name": "neutron-sriov-agent",
            "binary_version": "2:12.1.1-0ubuntu8.1"
          },
          {
            "binary_name": "python-neutron",
            "binary_version": "2:12.1.1-0ubuntu8.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "neutron",
        "purl": "pkg:deb/ubuntu/neutron@2:12.1.1-0ubuntu8.1?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2:12.1.1-0ubuntu8.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2:11.0.1-0ubuntu1",
        "2:12.0.0~b1-0ubuntu1",
        "2:12.0.0~b1-0ubuntu2",
        "2:12.0.0~b2-0ubuntu1",
        "2:12.0.0~b3-0ubuntu1",
        "2:12.0.0~rc1-0ubuntu1",
        "2:12.0.0~rc2-0ubuntu1",
        "2:12.0.0-0ubuntu1",
        "2:12.0.0-0ubuntu1.1",
        "2:12.0.0-0ubuntu1.2",
        "2:12.0.0-0ubuntu1.3",
        "2:12.0.0-0ubuntu1.4",
        "2:12.0.0-0ubuntu2",
        "2:12.0.0-0ubuntu3",
        "2:12.0.1-0ubuntu1",
        "2:12.0.1-0ubuntu1.1",
        "2:12.0.2-0ubuntu1",
        "2:12.0.3-0ubuntu1",
        "2:12.0.5-0ubuntu1",
        "2:12.0.5-0ubuntu4",
        "2:12.0.5-0ubuntu5",
        "2:12.0.6-0ubuntu1",
        "2:12.0.6-0ubuntu2",
        "2:12.0.6-0ubuntu3",
        "2:12.1.0-0ubuntu1",
        "2:12.1.1-0ubuntu1",
        "2:12.1.1-0ubuntu2",
        "2:12.1.1-0ubuntu3",
        "2:12.1.1-0ubuntu4",
        "2:12.1.1-0ubuntu7",
        "2:12.1.1-0ubuntu8"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2021-20267",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-38598",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-40085",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-40797",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2022-3277",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:20.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "neutron-common",
            "binary_version": "2:16.4.2-0ubuntu6.2"
          },
          {
            "binary_name": "neutron-dhcp-agent",
            "binary_version": "2:16.4.2-0ubuntu6.2"
          },
          {
            "binary_name": "neutron-l3-agent",
            "binary_version": "2:16.4.2-0ubuntu6.2"
          },
          {
            "binary_name": "neutron-linuxbridge-agent",
            "binary_version": "2:16.4.2-0ubuntu6.2"
          },
          {
            "binary_name": "neutron-macvtap-agent",
            "binary_version": "2:16.4.2-0ubuntu6.2"
          },
          {
            "binary_name": "neutron-metadata-agent",
            "binary_version": "2:16.4.2-0ubuntu6.2"
          },
          {
            "binary_name": "neutron-metering-agent",
            "binary_version": "2:16.4.2-0ubuntu6.2"
          },
          {
            "binary_name": "neutron-openvswitch-agent",
            "binary_version": "2:16.4.2-0ubuntu6.2"
          },
          {
            "binary_name": "neutron-ovn-metadata-agent",
            "binary_version": "2:16.4.2-0ubuntu6.2"
          },
          {
            "binary_name": "neutron-plugin-ml2",
            "binary_version": "2:16.4.2-0ubuntu6.2"
          },
          {
            "binary_name": "neutron-server",
            "binary_version": "2:16.4.2-0ubuntu6.2"
          },
          {
            "binary_name": "neutron-sriov-agent",
            "binary_version": "2:16.4.2-0ubuntu6.2"
          },
          {
            "binary_name": "python3-neutron",
            "binary_version": "2:16.4.2-0ubuntu6.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "neutron",
        "purl": "pkg:deb/ubuntu/neutron@2:16.4.2-0ubuntu6.2?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2:16.4.2-0ubuntu6.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2:15.0.0-0ubuntu1",
        "2:16.0.0~b1~git2019121613.3e8abb9a8f-0ubuntu1",
        "2:16.0.0~b2~git2020020712.d5b33ffc77-0ubuntu1",
        "2:16.0.0~b2~git2020020712.d5b33ffc77-0ubuntu3",
        "2:16.0.0~b3~git2020032420.a0e1b5804e-0ubuntu1",
        "2:16.0.0~b3~git2020032420.a0e1b5804e-0ubuntu2",
        "2:16.0.0~b3~git2020032420.a0e1b5804e-0ubuntu3",
        "2:16.0.0~b3~git2020032420.a0e1b5804e-0ubuntu4",
        "2:16.0.0~b3~git2020041013.e74c8f8c88-0ubuntu1",
        "2:16.0.0~b3~git2020041516.5f42488a9a-0ubuntu1",
        "2:16.0.0~b3~git2020041516.5f42488a9a-0ubuntu2",
        "2:16.0.0-0ubuntu0.20.04.1",
        "2:16.0.0-0ubuntu0.20.04.2",
        "2:16.1.0-0ubuntu1",
        "2:16.1.0-0ubuntu2",
        "2:16.2.0-0ubuntu1",
        "2:16.2.0-0ubuntu2",
        "2:16.2.0-0ubuntu3",
        "2:16.3.0-0ubuntu3",
        "2:16.3.1-0ubuntu1",
        "2:16.3.1-0ubuntu1.1",
        "2:16.3.2-0ubuntu2",
        "2:16.3.2-0ubuntu3",
        "2:16.4.0-0ubuntu2",
        "2:16.4.0-0ubuntu3",
        "2:16.4.1-0ubuntu2",
        "2:16.4.2-0ubuntu1",
        "2:16.4.2-0ubuntu2",
        "2:16.4.2-0ubuntu3",
        "2:16.4.2-0ubuntu4",
        "2:16.4.2-0ubuntu5",
        "2:16.4.2-0ubuntu6",
        "2:16.4.2-0ubuntu6.1"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2022-3277",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:22.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "neutron-common",
            "binary_version": "2:20.3.0-0ubuntu1.1"
          },
          {
            "binary_name": "neutron-dhcp-agent",
            "binary_version": "2:20.3.0-0ubuntu1.1"
          },
          {
            "binary_name": "neutron-l3-agent",
            "binary_version": "2:20.3.0-0ubuntu1.1"
          },
          {
            "binary_name": "neutron-linuxbridge-agent",
            "binary_version": "2:20.3.0-0ubuntu1.1"
          },
          {
            "binary_name": "neutron-macvtap-agent",
            "binary_version": "2:20.3.0-0ubuntu1.1"
          },
          {
            "binary_name": "neutron-metadata-agent",
            "binary_version": "2:20.3.0-0ubuntu1.1"
          },
          {
            "binary_name": "neutron-metering-agent",
            "binary_version": "2:20.3.0-0ubuntu1.1"
          },
          {
            "binary_name": "neutron-openvswitch-agent",
            "binary_version": "2:20.3.0-0ubuntu1.1"
          },
          {
            "binary_name": "neutron-ovn-metadata-agent",
            "binary_version": "2:20.3.0-0ubuntu1.1"
          },
          {
            "binary_name": "neutron-plugin-ml2",
            "binary_version": "2:20.3.0-0ubuntu1.1"
          },
          {
            "binary_name": "neutron-server",
            "binary_version": "2:20.3.0-0ubuntu1.1"
          },
          {
            "binary_name": "neutron-sriov-agent",
            "binary_version": "2:20.3.0-0ubuntu1.1"
          },
          {
            "binary_name": "python3-neutron",
            "binary_version": "2:20.3.0-0ubuntu1.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "neutron",
        "purl": "pkg:deb/ubuntu/neutron@2:20.3.0-0ubuntu1.1?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2:20.3.0-0ubuntu1.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2:19.0.0-0ubuntu1",
        "2:19.1.0+git2022030313.b072cbf05f-0ubuntu1",
        "2:20.0.0-0ubuntu1",
        "2:20.0.0-0ubuntu2",
        "2:20.0.0-0ubuntu3",
        "2:20.1.0-0ubuntu2",
        "2:20.2.0-0ubuntu1",
        "2:20.3.0-0ubuntu1"
      ]
    }
  ],
  "aliases": [],
  "details": "David Sinquin discovered that OpenStack Neutron incorrectly handled the\ndefault Open vSwitch firewall rules. An attacker could possibly use this\nissue to impersonate the IPv6 addresses of other systems on the network.\nThis issue only affected Ubuntu 18.04 LTS, and Ubuntu 20.04 LTS.\n(CVE-2021-20267)\n\nJake Yip and Justin Mammarella discovered that OpenStack Neutron\nincorrectly handled the linuxbridge driver when ebtables-nft is being\nused. An attacker could possibly use this issue to impersonate the hardware\naddresss of other systems on the network. This issue only affected Ubuntu\n18.04 LTS, and Ubuntu 20.04 LTS. (CVE-2021-38598)\n\nPavel Toporkov discovered that OpenStack Neutron incorrectly handled\nextra_dhcp_opts values. An attacker could possibly use this issue to\nreconfigure dnsmasq. This issue only affected Ubuntu 18.04 LTS, and Ubuntu\n20.04 LTS. (CVE-2021-40085)\n\nSlawek Kaplonski discovered that OpenStack Neutron incorrectly handled the\nroutes middleware. An attacker could possibly use this issue to cause the\nAPI worker to consume memory, leading to a denial of service. This issue\nonly affected Ubuntu 18.04 LTS, and Ubuntu 20.04 LTS. (CVE-2021-40797)\n\nIt was discovered that OpenStack Neutron incorrectly handled certain\nqueries. A remote authenticated user could possibly use this issue to cause\nresource consumption, leading to a denial of service. (CVE-2022-3277)\n",
  "id": "USN-6067-1",
  "modified": "2026-04-27T14:11:30Z",
  "published": "2023-05-10T11:30:08Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-6067-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-20267"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-38598"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-40085"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-40797"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2022-3277"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "neutron vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2021-20267",
    "UBUNTU-CVE-2021-38598",
    "UBUNTU-CVE-2021-40085",
    "UBUNTU-CVE-2021-40797",
    "UBUNTU-CVE-2022-3277"
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

UBUNTU-CVE-2021-20267 (CVE-2021-20267)

CVE-2021-20267 (GCVE-0-2021-20267)

USN-6067-1 (UBUNTU-CVE-2021-20267)

Tags

Sightings

Nomenclature

Related by attack behaviour