RHCOS 4 : OpenShift Container Platform 4.6.51 (RHSA-2021:4799)

critical Nessus Plugin ID 312407

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Synopsis

The remote Red Hat CoreOS host is missing one or more security updates for OpenShift Container Platform 4.6.51.

Description

The remote Red Hat Enterprise Linux CoreOS 4 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2021:4799 advisory.

- jenkins: FilePath#mkdirs does not check permission to create parent directories (CVE-2021-21685)

- jenkins: File path filters do not canonicalize paths, allowing operations to follow symbolic links to outside allowed directories (CVE-2021-21686)

- jenkins: FilePath#untar does not check permission to create symbolic links when unarchiving a symbolic link (CVE-2021-21687)

- jenkins: FilePath#reading(FileVisitor) does not reject any operations allowing users to have unrestricted read access (CVE-2021-21688)

- jenkins: FilePath#unzip and FilePath#untar were not subject to any access control (CVE-2021-21689)

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 4.6.51 packages based on the guidance in RHSA-2021:4799.

Plugin Details

Severity: Critical

ID: 312407

File Name: rhcos-RHSA-2021-4799.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: Medium

Score: 5.9

Vendor

Vendor Severity: Important

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.5

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

CVSS Score Source: CVE-2021-21696

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

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

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

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:jenkins, p-cpe:/a:redhat:enterprise_linux:jenkins-2-plugins, cpe:/o:redhat:enterprise_linux:8:coreos

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: 12/2/2021

Vulnerability Publication Date: 11/4/2021

Reference Information

CVE: CVE-2021-21685, CVE-2021-21686, CVE-2021-21687, CVE-2021-21688, CVE-2021-21689, CVE-2021-21690, CVE-2021-21691, CVE-2021-21692, CVE-2021-21693, CVE-2021-21694, CVE-2021-21695, CVE-2021-21696, CVE-2021-21697, CVE-2021-21698

CWE: 22, 276, 281, 59, 863

RHSA: 2021:4799

Detections

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