RHCOS 3 : OpenShift Container Platform 3.11.462 (RHSA-2021:2517)

high Nessus Plugin ID 312499

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Synopsis

The remote Red Hat CoreOS host is missing one or more security updates for OpenShift Container Platform 3.11.462.

Description

The remote Red Hat Enterprise Linux CoreOS 3 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2021:2517 advisory.

- jetty: local temporary directory hijacking vulnerability (CVE-2020-27216)

- jetty: buffer not correctly recycled in Gzip Request inflation (CVE-2020-27218)

- jetty: request containing multiple Accept headers with a large number of quality parameters may lead to DoS (CVE-2020-27223)

- jenkins-2-plugins/config-file-provider: Does not configure its XML parser to prevent XML external entity (XXE) attacks. (CVE-2021-21642)

- jenkins-2-plugins/config-file-provider: Does not correctly perform permission checks in several HTTP endpoints. (CVE-2021-21643)

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 RHCOS OpenShift Container Platform 3.11.462 package based on the guidance in RHSA-2021:2517.

Plugin Details

Severity: High

ID: 312499

File Name: rhcos-RHSA-2021-2517.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Red Hat Local Security Checks

Published: 5/6/2026

Updated: 5/6/2026

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: High

Score: 7.4

Vendor

Vendor Severity: Important

CVSS v2

Risk Factor: Medium

Base Score: 5.8

Temporal Score: 4.5

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

CVSS Score Source: CVE-2021-21644

CVSS v3

Risk Factor: High

Base Score: 8.1

Temporal Score: 7.3

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

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

CVSS Score Source: CVE-2021-21642

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:jenkins, p-cpe:/a:redhat:enterprise_linux:jenkins-2-plugins, cpe:/o:redhat:enterprise_linux:7:coreos

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 6/30/2021

Vulnerability Publication Date: 10/23/2020

Reference Information

CVE: CVE-2020-27216, CVE-2020-27218, CVE-2020-27223, CVE-2021-21642, CVE-2021-21643, CVE-2021-21644, CVE-2021-21645

CWE: 226, 281, 352, 377, 400, 611

RHSA: 2021:2517

Detections

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