RHCOS 3 : OpenShift Container Platform 3.11 (RHSA-2020:1287)

critical Nessus Plugin ID 312521

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Synopsis

The remote Red Hat CoreOS host is missing one or more security updates for OpenShift Container Platform 3.11.

Description

The remote Red Hat Enterprise Linux CoreOS 3 host has a package installed that is affected by multiple vulnerabilities as referenced in the RHSA-2020:1287 advisory.

- haproxy: HTTP request smuggling issue with transfer-encoding header containing an obfuscated chunked value (CVE-2019-18277)

- haproxy: HTTP/2 implementation vulnerable to intermediary encapsulation attacks (CVE-2019-19330)

- haproxy: malformed HTTP/2 requests can lead to out-of-bounds writes (CVE-2020-11100)

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 package based on the guidance in RHSA-2020:1287.

Plugin Details

Severity: Critical

ID: 312521

File Name: rhcos-RHSA-2020-1287.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: 6.7

Vendor

Vendor Severity: Critical

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.9

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

CVSS Score Source: CVE-2019-19330

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.8

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:P/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:haproxy, p-cpe:/a:redhat:enterprise_linux:haproxy18, 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: 4/7/2020

Vulnerability Publication Date: 10/23/2019

Reference Information

CVE: CVE-2019-18277, CVE-2019-19330, CVE-2020-11100

CWE: 20, 444, 787

RHSA: 2020:1287

Detections

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