RHEL 7 : openvswitch2.11 (RHSA-2021:1050)

high Nessus Plugin ID 148257

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Synopsis

The remote Red Hat host is missing one or more security updates for openvswitch2.11.

Description

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2021:1050 advisory.

Open vSwitch provides standard network bridging functions and support for the OpenFlow protocol for remote per-flow control of traffic.

Security Fix(es):

* openvswitch: limitation in the OVS packet parsing in userspace leads to DoS (CVE-2020-35498)

* lldp/openvswitch: denial of service via externally triggered memory leak (CVE-2020-27827)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Update the RHEL openvswitch2.11 package based on the guidance in RHSA-2021:1050.

Plugin Details

Severity: High

ID: 148257

File Name: redhat-RHSA-2021-1050.nasl

Version: 1.12

Type: local

Agent: unix

Family: Red Hat Local Security Checks

Published: 3/31/2021

Updated: 11/7/2024

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

Vendor

Vendor Severity: Moderate

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

CVSS Score Source: CVE-2020-35498

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:redhat:enterprise_linux:7, p-cpe:/a:redhat:enterprise_linux:ovn2.11-vtep, p-cpe:/a:redhat:enterprise_linux:python-openvswitch2.11, p-cpe:/a:redhat:enterprise_linux:ovn2.11, p-cpe:/a:redhat:enterprise_linux:ovn2.11-host, p-cpe:/a:redhat:enterprise_linux:openvswitch2.11, p-cpe:/a:redhat:enterprise_linux:openvswitch2.11-devel

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu

Exploit Ease: No known exploits are available

Patch Publication Date: 3/31/2021

Vulnerability Publication Date: 2/11/2021

Reference Information

CVE: CVE-2020-27827, CVE-2020-35498

CWE: 400

RHSA: 2021:1050

Detections

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