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CentOS 7 : kpatch-patch (RHSA-2021:3768)

high Nessus Plugin ID 208494

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Synopsis

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

Description

The remote CentOS Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2021:3768 advisory.

 - An issue was discovered in Linux: KVM through Improper handling of VM_IO|VM_PFNMAP vmas in KVM can bypass RO checks and can lead to pages being freed while still accessible by the VMM and guest. This allows users with the ability to start and control a VM to read/write random pages of memory and can result in local privilege escalation. (CVE-2021-22543)

 - arch/powerpc/kvm/book3s_rtas.c in the Linux kernel through 5.13.5 on the powerpc platform allows KVM guest OS users to cause host OS memory corruption via rtas_args.nargs, aka CID-f62f3c20647e. (CVE-2021-37576)

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/errata/RHSA-2021:3768

Plugin Details

Severity: High

ID: 208494

File Name: centos_RHSA-2021-3768.nasl

Version: 1.1

Type: local

Agent: unix

Published: 10/9/2024

Updated: 10/9/2024

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

Vendor

Vendor Severity: Important

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 5.6

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

CVSS Score Source: CVE-2021-37576

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 7

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:P/RL:O/RC:C

CVSS v4

Risk Factor: High

Base Score: 8.7

Threat Score: 7.2

Threat Vector: CVSS:4.0/E:P

Vector: CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:L/SC:H/SI:H/SA:L

CVSS Score Source: CVE-2021-22543

Vulnerability Information

CPE: p-cpe:/a:centos:centos:kpatch-patch-3_10_0-1160_25_1, cpe:/o:centos:centos:7, p-cpe:/a:centos:centos:kpatch-patch-3_10_0-1160_2_2, p-cpe:/a:centos:centos:kpatch-patch-3_10_0-1160_36_2, p-cpe:/a:centos:centos:kpatch-patch-3_10_0-1160_6_1, p-cpe:/a:centos:centos:kpatch-patch-3_10_0-1160_41_1, p-cpe:/a:centos:centos:kpatch-patch-3_10_0-1160_42_2, p-cpe:/a:centos:centos:kpatch-patch-3_10_0-1160_21_1, p-cpe:/a:centos:centos:kpatch-patch-3_10_0-1160_24_1, p-cpe:/a:centos:centos:kpatch-patch-3_10_0-1160_11_1, p-cpe:/a:centos:centos:kpatch-patch-3_10_0-1160_31_1, p-cpe:/a:centos:centos:kpatch-patch-3_10_0-1160_2_1, p-cpe:/a:centos:centos:kpatch-patch-3_10_0-1160_15_2

Required KB Items: Host/local_checks_enabled, Host/CentOS/release, Host/CentOS/rpm-list, Host/cpu

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 10/12/2021

Vulnerability Publication Date: 5/18/2021

Reference Information

CVE: CVE-2021-22543, CVE-2021-37576

RHSA: 2021:3768