RHCOS : OpenShift Container Platform 4.8.25 (RHSA-2021:5208)

high Nessus Plugin ID 312517

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Synopsis

The remote Red Hat CoreOS host is missing one or more security updates for OpenShift Container Platform 4.8.25.

Description

The remote Red Hat Enterprise Linux CoreOS host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2021:5208 advisory.

- haproxy: does not ensure that the scheme and path portions of a URI have the expected characters (CVE-2021-39240)

- haproxy: an HTTP method name may contain a space followed by the name of a protected resource (CVE-2021-39241)

- haproxy: it can lead to a situation with an attacker-controlled HTTP Host header because a mismatch between Host and authority is mishandled (CVE-2021-39242)

- haproxy: request smuggling attack or response splitting via duplicate content-length header (CVE-2021-40346)

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 4.8.25 package based on the guidance in RHSA-2021:5208.

Plugin Details

Severity: High

ID: 312517

File Name: rhcos-RHSA-2021-5208.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: 4.4

Vendor

Vendor Severity: Moderate

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.9

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

CVSS Score Source: CVE-2021-40346

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.7

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

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

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:haproxy, cpe:/o:redhat:enterprise_linux:8:coreos, 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: 1/5/2022

Vulnerability Publication Date: 8/17/2021

Reference Information

CVE: CVE-2021-39240, CVE-2021-39241, CVE-2021-39242, CVE-2021-40346

CWE: 20, 444

RHSA: 2021:5208

Detections

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