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RHEL 7 : kpatch-patch (RHSA-2021:4000)

high Nessus Plugin ID 154666

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Synopsis

The remote Red Hat host is missing one or more security updates for kpatch-patch.

Description

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2021:4000 advisory.

 This is a kernel live patch module which is automatically loaded by the RPM post-install script to modify the code of a running kernel.

 Security Fix(es):

 * kernel: Improper handling of VM_IO|VM_PFNMAP vmas in KVM can bypass RO checks (CVE-2021-22543)

 * kernel: powerpc: KVM guest OS users can cause host OS memory corruption (CVE-2021-37576)

 For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

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 RHEL kpatch-patch package based on the guidance in RHSA-2021:4000.

See Also

http://www.nessus.org/u?48b5ef8c

https://access.redhat.com/security/updates/classification/#important

https://access.redhat.com/errata/RHSA-2021:4000

https://bugzilla.redhat.com/show_bug.cgi?id=1965461

https://bugzilla.redhat.com/show_bug.cgi?id=1986506

Plugin Details

Severity: High

ID: 154666

File Name: redhat-RHSA-2021-4000.nasl

Version: 1.9

Type: local

Agent: unix

Published: 10/28/2021

Updated: 11/7/2024

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, 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:redhat:enterprise_linux:kpatch-patch-3_10_0-1062_46_1, p-cpe:/a:redhat:enterprise_linux:kpatch-patch-3_10_0-1062_51_1, p-cpe:/a:redhat:enterprise_linux:kpatch-patch-3_10_0-1062_56_1, cpe:/o:redhat:rhel_e4s:7.7, p-cpe:/a:redhat:enterprise_linux:kpatch-patch-3_10_0-1062_43_1, p-cpe:/a:redhat:enterprise_linux:kpatch-patch-3_10_0-1062_52_2, p-cpe:/a:redhat:enterprise_linux:kpatch-patch-3_10_0-1062_45_1, p-cpe:/a:redhat:enterprise_linux:kpatch-patch-3_10_0-1062_49_1, p-cpe:/a:redhat:enterprise_linux:kpatch-patch-3_10_0-1062_40_1

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: 10/26/2021

Vulnerability Publication Date: 5/26/2021

Reference Information

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

CWE: 119, 863

RHSA: 2021:4000