RHEL 8 : kernel-rt (RHSA-2022:0821)

high Nessus Plugin ID 158813

Synopsis

The remote Red Hat host is missing one or more security updates.

Description

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2022:0821 advisory.

- kernel: fget: check that the fd still exists after getting a ref to it (CVE-2021-4083)

- kernel: possible privileges escalation due to missing TLB flush (CVE-2022-0330)

- kernel: cgroups v1 release_agent feature may allow privilege escalation (CVE-2022-0492)

- kernel: improper initialization of the flags member of the new pipe_buffer (CVE-2022-0847)

- kernel: failing usercopy allows for use-after-free exploitation (CVE-2022-22942)

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.

See Also

https://access.redhat.com/security/cve/CVE-2021-4083

https://access.redhat.com/security/cve/CVE-2022-0330

https://access.redhat.com/security/cve/CVE-2022-0492

https://access.redhat.com/security/cve/CVE-2022-0847

https://access.redhat.com/security/cve/CVE-2022-22942

https://access.redhat.com/errata/RHSA-2022:0821

https://bugzilla.redhat.com/2029923

https://bugzilla.redhat.com/2042404

https://bugzilla.redhat.com/2044809

https://bugzilla.redhat.com/2051505

https://bugzilla.redhat.com/2060795

Plugin Details

Severity: High

ID: 158813

File Name: redhat-RHSA-2022-0821.nasl

Version: 1.8

Type: local

Agent: unix

Published: 3/11/2022

Updated: 9/22/2022

Supported Sensors: Agentless Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent

Risk Information

VPR

Risk Factor: Critical

Score: 9.8

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 6.3

Vector: AV:L/AC:L/Au:N/C:C/I:C/A:C

Temporal Vector: E:H/RL:OF/RC:C

CVSS Score Source: CVE-2022-0847

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 7.5

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

Temporal Vector: E:H/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:redhat:rhel_aus:8.2, cpe:/o:redhat:rhel_e4s:8.2, cpe:/o:redhat:rhel_eus:8.2, cpe:/o:redhat:rhel_tus:8.2, p-cpe:/a:redhat:enterprise_linux:kernel-rt, p-cpe:/a:redhat:enterprise_linux:kernel-rt-core, p-cpe:/a:redhat:enterprise_linux:kernel-rt-debug, p-cpe:/a:redhat:enterprise_linux:kernel-rt-debug-core, p-cpe:/a:redhat:enterprise_linux:kernel-rt-debug-devel, p-cpe:/a:redhat:enterprise_linux:kernel-rt-debug-kvm, p-cpe:/a:redhat:enterprise_linux:kernel-rt-debug-modules, p-cpe:/a:redhat:enterprise_linux:kernel-rt-debug-modules-extra, p-cpe:/a:redhat:enterprise_linux:kernel-rt-devel, p-cpe:/a:redhat:enterprise_linux:kernel-rt-kvm, p-cpe:/a:redhat:enterprise_linux:kernel-rt-modules, p-cpe:/a:redhat:enterprise_linux:kernel-rt-modules-extra

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: 3/10/2022

Vulnerability Publication Date: 1/18/2022

CISA Known Exploited Dates: 5/16/2022

Exploitable With

CANVAS (CANVAS)

Metasploit (Dirty Pipe Local Privilege Escalation via CVE-2022-0847)

Reference Information

CVE: CVE-2021-4083, CVE-2022-0330, CVE-2022-0492, CVE-2022-0847, CVE-2022-22942

RHSA: 2022:0821

CWE: 281, 287, 416, 665