RHEL 8 : kernel-rt (RHSA-2021:2719)

high Nessus Plugin ID 151856

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-2021:2719 advisory.

- kernel: perf_event_parse_addr_filter memory (CVE-2020-25704)

- kernel: security bypass in certs/blacklist.c and certs/system_keyring.c (CVE-2020-26541)

- kernel: fork: fix copy_process(CLONE_PARENT) race with the exiting ->real_parent (CVE-2020-35508)

- kernel: use-after-free in net/bluetooth/hci_event.c when destroying an hci_chan (CVE-2021-33034)

- kernel: size_t-to-int conversion vulnerability in the filesystem layer (CVE-2021-33909)

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://bugzilla.redhat.com/1886285

https://bugzilla.redhat.com/1895961

https://bugzilla.redhat.com/1902724

https://bugzilla.redhat.com/1961305

https://bugzilla.redhat.com/1970273

https://access.redhat.com/security/cve/CVE-2020-25704

https://access.redhat.com/security/cve/CVE-2020-26541

https://access.redhat.com/security/cve/CVE-2020-35508

https://access.redhat.com/security/cve/CVE-2021-33034

https://access.redhat.com/security/cve/CVE-2021-33909

https://access.redhat.com/errata/RHSA-2021:2719

Plugin Details

Severity: High

ID: 151856

File Name: redhat-RHSA-2021-2719.nasl

Version: 1.10

Type: local

Agent: unix

Published: 7/21/2021

Updated: 1/23/2023

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

Risk Information

VPR

Risk Factor: Critical

Score: 9.5

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 6.3

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

CVSS Score Source: CVE-2021-33909

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: CVSS:3.0/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: 7/20/2021

Vulnerability Publication Date: 10/2/2020

Reference Information

CVE: CVE-2020-25704, CVE-2020-26541, CVE-2020-35508, CVE-2021-33034, CVE-2021-33909

CWE: 200, 347, 400, 401, 416, 665, 787

IAVA: 2021-A-0350

RHSA: 2021:2719