ubuntu-cve-2020-35498
Vulnerability from osv_ubuntu
Published
2021-02-10 00:00
Modified
2025-09-08 16:46
Summary
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.
Severity
7.5 (High)
7.5 (High)
N/A (UNKNOWN)
References
| URL | Type | |
|---|---|---|
{
"affected": [
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "openvswitch-common",
"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-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-dpdk",
"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-vtep",
"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-common",
"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-host",
"binary_version": "2.5.9-0ubuntu0.16.04.3"
},
{
"binary_name": "python-openvswitch",
"binary_version": "2.5.9-0ubuntu0.16.04.3"
}
]
},
"package": {
"ecosystem": "Ubuntu:16.04:LTS",
"name": "openvswitch",
"purl": "pkg:deb/ubuntu/openvswitch@2.5.9-0ubuntu0.16.04.3?arch=source\u0026distro=xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.5.9-0ubuntu0.16.04.3"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"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": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "openvswitch-common",
"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"
}
]
},
"package": {
"ecosystem": "Ubuntu:18.04:LTS",
"name": "openvswitch",
"purl": "pkg:deb/ubuntu/openvswitch@2.9.8-0ubuntu0.18.04.2?arch=source\u0026distro=bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.9.8-0ubuntu0.18.04.2"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"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": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "openvswitch-common",
"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"
}
]
},
"package": {
"ecosystem": "Ubuntu:20.04:LTS",
"name": "openvswitch",
"purl": "pkg:deb/ubuntu/openvswitch@2.13.1-0ubuntu0.20.04.4?arch=source\u0026distro=focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.13.1-0ubuntu0.20.04.4"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"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"
]
}
],
"aliases": [],
"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.",
"id": "UBUNTU-CVE-2020-35498",
"modified": "2025-09-08T16:46:31Z",
"published": "2021-02-10T00:00:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2020-35498"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-4729-1"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2020-35498"
}
],
"related": [
"USN-4729-1"
],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2020-35498"
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
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.
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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.
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