UBUNTU-CVE-2020-35498

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Source
https://ubuntu.com/security/CVE-2020-35498
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-35498.json
JSON Data
https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2020-35498
Upstream
Downstream
Related
Published
2021-02-10T00:00:00Z
Modified
2025-07-16T07:34:14.680994Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

A vulnerability was found in openvswitch. A limitation in the implementation of userspace packet parsing can allow a malicious user to send a specially crafted packet causing the resulting megaflow in the kernel to be too wide, potentially causing a denial of service. The highest threat from this vulnerability is to system availability.

References

Affected packages

Ubuntu:16.04:LTS / openvswitch

Package

Name
openvswitch
Purl
pkg:deb/ubuntu/openvswitch@2.5.9-0ubuntu0.16.04.3?arch=source&distro=xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.5.9-0ubuntu0.16.04.3

Affected versions

2.*

2.4.0-0ubuntu4
2.4.0-0ubuntu5
2.5.0~git20160129.46a88d9-0ubuntu1
2.5.0~git20160219.522aca6-0ubuntu1
2.5.0~git20160219.522aca6-0ubuntu2
2.5.0~git20160219.522aca6-0ubuntu3
2.5.0-0ubuntu1
2.5.2-0ubuntu0.16.04.1
2.5.2-0ubuntu0.16.04.2
2.5.2-0ubuntu0.16.04.3
2.5.4-0ubuntu0.16.04.1
2.5.5-0ubuntu0.16.04.1
2.5.5-0ubuntu0.16.04.2
2.5.9-0ubuntu0.16.04.2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "openvswitch-common",
            "binary_version": "2.5.9-0ubuntu0.16.04.3"
        },
        {
            "binary_name": "openvswitch-common-dbgsym",
            "binary_version": "2.5.9-0ubuntu0.16.04.3"
        },
        {
            "binary_name": "openvswitch-dbg",
            "binary_version": "2.5.9-0ubuntu0.16.04.3"
        },
        {
            "binary_name": "openvswitch-ipsec",
            "binary_version": "2.5.9-0ubuntu0.16.04.3"
        },
        {
            "binary_name": "openvswitch-ipsec-dbgsym",
            "binary_version": "2.5.9-0ubuntu0.16.04.3"
        },
        {
            "binary_name": "openvswitch-pki",
            "binary_version": "2.5.9-0ubuntu0.16.04.3"
        },
        {
            "binary_name": "openvswitch-switch",
            "binary_version": "2.5.9-0ubuntu0.16.04.3"
        },
        {
            "binary_name": "openvswitch-switch-dbgsym",
            "binary_version": "2.5.9-0ubuntu0.16.04.3"
        },
        {
            "binary_name": "openvswitch-switch-dpdk",
            "binary_version": "2.5.9-0ubuntu0.16.04.3"
        },
        {
            "binary_name": "openvswitch-switch-dpdk-dbgsym",
            "binary_version": "2.5.9-0ubuntu0.16.04.3"
        },
        {
            "binary_name": "openvswitch-test",
            "binary_version": "2.5.9-0ubuntu0.16.04.3"
        },
        {
            "binary_name": "openvswitch-testcontroller",
            "binary_version": "2.5.9-0ubuntu0.16.04.3"
        },
        {
            "binary_name": "openvswitch-testcontroller-dbgsym",
            "binary_version": "2.5.9-0ubuntu0.16.04.3"
        },
        {
            "binary_name": "openvswitch-vtep",
            "binary_version": "2.5.9-0ubuntu0.16.04.3"
        },
        {
            "binary_name": "openvswitch-vtep-dbgsym",
            "binary_version": "2.5.9-0ubuntu0.16.04.3"
        },
        {
            "binary_name": "ovn-central",
            "binary_version": "2.5.9-0ubuntu0.16.04.3"
        },
        {
            "binary_name": "ovn-central-dbgsym",
            "binary_version": "2.5.9-0ubuntu0.16.04.3"
        },
        {
            "binary_name": "ovn-common",
            "binary_version": "2.5.9-0ubuntu0.16.04.3"
        },
        {
            "binary_name": "ovn-common-dbgsym",
            "binary_version": "2.5.9-0ubuntu0.16.04.3"
        },
        {
            "binary_name": "ovn-docker",
            "binary_version": "2.5.9-0ubuntu0.16.04.3"
        },
        {
            "binary_name": "ovn-docker-dbgsym",
            "binary_version": "2.5.9-0ubuntu0.16.04.3"
        },
        {
            "binary_name": "ovn-host",
            "binary_version": "2.5.9-0ubuntu0.16.04.3"
        },
        {
            "binary_name": "ovn-host-dbgsym",
            "binary_version": "2.5.9-0ubuntu0.16.04.3"
        },
        {
            "binary_name": "python-openvswitch",
            "binary_version": "2.5.9-0ubuntu0.16.04.3"
        }
    ],
    "availability": "No subscription required"
}

Ubuntu:18.04:LTS / openvswitch

Package

Name
openvswitch
Purl
pkg:deb/ubuntu/openvswitch@2.9.8-0ubuntu0.18.04.2?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.9.8-0ubuntu0.18.04.2

Affected versions

2.*

2.8.0-0ubuntu2
2.8.1-0ubuntu2
2.8.1-0ubuntu3
2.9.0~git20180205.5a39582ca-0ubuntu1
2.9.0-0ubuntu1
2.9.2-0ubuntu0.18.04.2
2.9.2-0ubuntu0.18.04.3
2.9.5-0ubuntu0.18.04.1
2.9.7-0ubuntu0.18.04.2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "openvswitch-common",
            "binary_version": "2.9.8-0ubuntu0.18.04.2"
        },
        {
            "binary_name": "openvswitch-dbg",
            "binary_version": "2.9.8-0ubuntu0.18.04.2"
        },
        {
            "binary_name": "openvswitch-doc",
            "binary_version": "2.9.8-0ubuntu0.18.04.2"
        },
        {
            "binary_name": "openvswitch-pki",
            "binary_version": "2.9.8-0ubuntu0.18.04.2"
        },
        {
            "binary_name": "openvswitch-switch",
            "binary_version": "2.9.8-0ubuntu0.18.04.2"
        },
        {
            "binary_name": "openvswitch-switch-dpdk",
            "binary_version": "2.9.8-0ubuntu0.18.04.2"
        },
        {
            "binary_name": "openvswitch-test",
            "binary_version": "2.9.8-0ubuntu0.18.04.2"
        },
        {
            "binary_name": "openvswitch-testcontroller",
            "binary_version": "2.9.8-0ubuntu0.18.04.2"
        },
        {
            "binary_name": "openvswitch-vtep",
            "binary_version": "2.9.8-0ubuntu0.18.04.2"
        },
        {
            "binary_name": "ovn-central",
            "binary_version": "2.9.8-0ubuntu0.18.04.2"
        },
        {
            "binary_name": "ovn-common",
            "binary_version": "2.9.8-0ubuntu0.18.04.2"
        },
        {
            "binary_name": "ovn-controller-vtep",
            "binary_version": "2.9.8-0ubuntu0.18.04.2"
        },
        {
            "binary_name": "ovn-docker",
            "binary_version": "2.9.8-0ubuntu0.18.04.2"
        },
        {
            "binary_name": "ovn-host",
            "binary_version": "2.9.8-0ubuntu0.18.04.2"
        },
        {
            "binary_name": "python-openvswitch",
            "binary_version": "2.9.8-0ubuntu0.18.04.2"
        },
        {
            "binary_name": "python3-openvswitch",
            "binary_version": "2.9.8-0ubuntu0.18.04.2"
        }
    ],
    "availability": "No subscription required"
}

Ubuntu:20.04:LTS / openvswitch

Package

Name
openvswitch
Purl
pkg:deb/ubuntu/openvswitch@2.13.1-0ubuntu0.20.04.4?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.13.1-0ubuntu0.20.04.4

Affected versions

2.*

2.12.0-0ubuntu1
2.12.0-0ubuntu2
2.12.1~git20191107.7accd1302-0ubuntu1
2.12.90~git20200107.af683565b-0ubuntu1
2.12.90~git20200107.af683565b-0ubuntu2
2.12.90~git20200107.af683565b-0ubuntu3
2.13.0~git20200127.dbdf66c29-0ubuntu2
2.13.0~git20200212.15ae9db33-0ubuntu1
2.13.0~git20200212.15ae9db33-0ubuntu2
2.13.0-0ubuntu1
2.13.1-0ubuntu0.20.04.1
2.13.1-0ubuntu0.20.04.3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "openvswitch-common",
            "binary_version": "2.13.1-0ubuntu0.20.04.4"
        },
        {
            "binary_name": "openvswitch-dbg",
            "binary_version": "2.13.1-0ubuntu0.20.04.4"
        },
        {
            "binary_name": "openvswitch-doc",
            "binary_version": "2.13.1-0ubuntu0.20.04.4"
        },
        {
            "binary_name": "openvswitch-pki",
            "binary_version": "2.13.1-0ubuntu0.20.04.4"
        },
        {
            "binary_name": "openvswitch-source",
            "binary_version": "2.13.1-0ubuntu0.20.04.4"
        },
        {
            "binary_name": "openvswitch-switch",
            "binary_version": "2.13.1-0ubuntu0.20.04.4"
        },
        {
            "binary_name": "openvswitch-switch-dpdk",
            "binary_version": "2.13.1-0ubuntu0.20.04.4"
        },
        {
            "binary_name": "openvswitch-test",
            "binary_version": "2.13.1-0ubuntu0.20.04.4"
        },
        {
            "binary_name": "openvswitch-testcontroller",
            "binary_version": "2.13.1-0ubuntu0.20.04.4"
        },
        {
            "binary_name": "openvswitch-vtep",
            "binary_version": "2.13.1-0ubuntu0.20.04.4"
        },
        {
            "binary_name": "python3-openvswitch",
            "binary_version": "2.13.1-0ubuntu0.20.04.4"
        }
    ],
    "availability": "No subscription required"
}