Oracle Linux 7 : Unbreakable Enterprise kernel-container kata-image kata-runtime kata kubernetes olcne (ELSA-2020-5766)

high Nessus Plugin ID 180954

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Synopsis

The remote Oracle Linux host is missing one or more security updates.

Description

The remote Oracle Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2020-5766 advisory.

- An improper link resolution vulnerability affects Kata Containers versions prior to 1.11.0. Upon container teardown, a malicious guest can trick the kata-runtime into unmounting any mount point on the host and all mount points underneath it, potentiality resulting in a host DoS. (CVE-2020-2024)

- Kata Containers before 1.11.0 on Cloud Hypervisor persists guest filesystem changes to the underlying image file on the host. A malicious guest can overwrite the image file to gain control of all subsequent guest VMs. Since Kata Containers uses the same VM image file with all VMMs, this issue may also affect QEMU and Firecracker based guests. (CVE-2020-2025)

- A malicious guest compromised before a container creation (e.g. a malicious guest image or a guest running multiple containers) can trick the kata runtime into mounting the untrusted container filesystem on any host path, potentially allowing for code execution on the host. This issue affects: Kata Containers 1.11 versions earlier than 1.11.1; Kata Containers 1.10 versions earlier than 1.10.5; Kata Containers 1.9 and earlier versions. (CVE-2020-2026)

- The Kubernetes kubelet component in versions 1.1-1.16.12, 1.17.0-1.17.8 and 1.18.0-1.18.5 do not account for disk usage by a pod which writes to its own /etc/hosts file. The /etc/hosts file mounted in a pod by kubelet is not included by the kubelet eviction manager when calculating ephemeral storage usage by a pod.
If a pod writes a large amount of data to the /etc/hosts file, it could fill the storage space of the node and cause the node to fail. (CVE-2020-8557)

- The Kubernetes kube-apiserver in versions v1.6-v1.15, and versions prior to v1.16.13, v1.17.9 and v1.18.6 are vulnerable to an unvalidated redirect on proxied upgrade requests that could allow an attacker to escalate privileges from a node compromise to a full cluster compromise. (CVE-2020-8559)

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 affected packages.

Plugin Details

Severity: High

ID: 180954

File Name: oraclelinux_ELSA-2020-5766.nasl

Version: 1.0

Type: local

Agent: unix

Family: Oracle Linux Local Security Checks

Published: 9/7/2023

Updated: 9/7/2023

Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Medium

Base Score: 6

Temporal Score: 4.7

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

CVSS Score Source: CVE-2020-8559

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 7.9

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

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

CVSS Score Source: CVE-2020-2026

Vulnerability Information

CPE: cpe:/o:oracle:linux:7, p-cpe:/a:oracle:linux:kata, p-cpe:/a:oracle:linux:kata-image, p-cpe:/a:oracle:linux:kata-runtime, p-cpe:/a:oracle:linux:kernel-uek-container, p-cpe:/a:oracle:linux:kubeadm, p-cpe:/a:oracle:linux:kubectl, p-cpe:/a:oracle:linux:kubelet, p-cpe:/a:oracle:linux:olcne-agent, p-cpe:/a:oracle:linux:olcne-api-server, p-cpe:/a:oracle:linux:olcne-nginx, p-cpe:/a:oracle:linux:olcne-utils, p-cpe:/a:oracle:linux:olcnectl

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 7/22/2020

Vulnerability Publication Date: 5/19/2020

Reference Information

CVE: CVE-2020-2024, CVE-2020-2025, CVE-2020-2026, CVE-2020-8557, CVE-2020-8559

Detections

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