Home/CVE/A vulnerability was found in openvswitch. A limitation in the implementation of userspace packet parsing can allow a mal
CVE

CVE-2020-35498

A vulnerability was found in openvswitch. A limitation in the implementation of userspace packet parsing can allow a mal

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.

HIGH · CVSS 7.5 EPSS 0.05687
Schedule remediation
  • EPSS percentile: top 9% of all CVEs by exploitation likelihood
  • SSVC automatable: yes - attacks can be scripted at scale
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-400Uncontrolled Resource Consumption
▤

Affected Products & Versions

12
openvswitch>= 2.5.0 and < 2.5.12
openvswitch>= 2.6.0 and < 2.6.10
openvswitch>= 2.7.0 and < 2.7.13
openvswitch>= 2.8.0 and < 2.8.11
openvswitch>= 2.9.0 and < 2.9.9
openvswitch>= 2.10.0 and < 2.10.7
openvswitch>= 2.11.0 and < 2.11.6
openvswitch>= 2.12.0 and < 2.12.3
▣

Scoring & Timeline

7.5
HIGH · CVSS v3.1 · secalert@redhat.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD11 Feb 2021 · 06:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
yes
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

17
suse-csafSUSE-SU-2022:3384-1
msrcCVE-2020-35498
suse-csafSUSE-SU-2021:0479-1
suse-csafopenSUSE-SU-2021:0283-1
suse-csafSUSE-SU-2021:0446-1
🔗

References & Sources

6
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://bugzilla.redhat.com/show_bug.cgi?id=1908845Issue TrackingPatchThird Party Advisory
https://lists.debian.org/debian-lts-announce/2021/02/msg00032.htmlMailing ListThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UJ4DXFJWMZ325ECZXPZOSK7BOEDJZHPR/
https://security.gentoo.org/glsa/202311-16
https://www.debian.org/security/2021/dsa-4852Third Party Advisory
https://www.openwall.com/lists/oss-security/2021/02/10/4Mailing ListPatchThird Party Advisory
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