UBUNTU-CVE-2021-40085

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Source
https://ubuntu.com/security/CVE-2021-40085
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-40085.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2021-40085
Upstream
Downstream
Related
Published
2021-08-31T15:00:00Z
Modified
2025-10-24T04:50:34Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

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 extradhcpopts value.

References

Affected packages

Ubuntu:16.04:LTS / neutron

Package

Name
neutron
Purl
pkg:deb/ubuntu/neutron@2:8.4.0-0ubuntu7.5?arch=source&distro=xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

2:7.*

2:7.0.0-0ubuntu1

2:8.*

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 

{
    "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"
        },
        {
            "binary_name": "neutron-l3-agent",
            "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"
        }
    ]
}

Ubuntu:18.04:LTS / neutron

Package

Name
neutron
Purl
pkg:deb/ubuntu/neutron@2:12.1.1-0ubuntu8.1?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2:12.1.1-0ubuntu8.1

Affected versions

2:11.*

2:11.0.1-0ubuntu1

2:12.*

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 

{
    "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"
        }
    ],
    "availability": "No subscription required"
}

Ubuntu:20.04:LTS / neutron

Package

Name
neutron
Purl
pkg:deb/ubuntu/neutron@2:16.4.2-0ubuntu6.2?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2:16.4.2-0ubuntu6.2

Affected versions

2:15.*

2:15.0.0-0ubuntu1

2:16.*

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

Ecosystem specific 

{
    "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"
        }
    ],
    "availability": "No subscription required"
}