Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2020-35498

Severity CVSS v4.0:
Pending analysis
Type:
CWE-400 Uncontrolled Resource Consumption ('Resource Exhaustion')
Publication date:
11/02/2021
Last modified:
23/04/2025

Description

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.

Impact

Vector 3.x
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.50 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x
7.50
Severity 3.x
HIGH
Vector 2.0
AV:N/AC:L/Au:N/C:N/I:N/A:C CVSS v2.0 Severity and Metrics:

Base Score: 7.80 HIGH
Vector: AV:N/AC:L/Au:N/C:N/I:N/A:C

Attack Vector (AV): Network
Attack Complexity (AC): Low
Authentication (Au): None
Confidentiality (C): None
Integrity (I): None
Availability (A): Complete

Base Score 2.0
7.80
Severity 2.0
HIGH

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:openvswitch:openvswitch:*:*:*:*:*:*:*:* 2.5.0 (including) 2.5.12 (excluding)
cpe:2.3:a:openvswitch:openvswitch:*:*:*:*:*:*:*:* 2.6.0 (including) 2.6.10 (excluding)
cpe:2.3:a:openvswitch:openvswitch:*:*:*:*:*:*:*:* 2.7.0 (including) 2.7.13 (excluding)
cpe:2.3:a:openvswitch:openvswitch:*:*:*:*:*:*:*:* 2.8.0 (including) 2.8.11 (excluding)
cpe:2.3:a:openvswitch:openvswitch:*:*:*:*:*:*:*:* 2.9.0 (including) 2.9.9 (excluding)
cpe:2.3:a:openvswitch:openvswitch:*:*:*:*:*:*:*:* 2.10.0 (including) 2.10.7 (excluding)
cpe:2.3:a:openvswitch:openvswitch:*:*:*:*:*:*:*:* 2.11.0 (including) 2.11.6 (excluding)
cpe:2.3:a:openvswitch:openvswitch:*:*:*:*:*:*:*:* 2.12.0 (including) 2.12.3 (excluding)
cpe:2.3:a:openvswitch:openvswitch:*:*:*:*:*:*:*:* 2.13.0 (including) 2.13.3 (excluding)
cpe:2.3:a:openvswitch:openvswitch:*:*:*:*:*:*:*:* 2.14.0 (including) 2.14.2 (excluding)
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools