RHEL 7 : kpatch-patch (RHSA-2021:3814)

high Nessus Plugin ID 154070

Synopsis

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

Description

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2021:3814 advisory.

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

- kernel: out-of-bounds write in xt_compat_target_from_user() in net/netfilter/x_tables.c (CVE-2021-22555)

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

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

See Also

https://cwe.mitre.org/data/definitions/20.html

https://cwe.mitre.org/data/definitions/119.html

https://cwe.mitre.org/data/definitions/787.html

https://cwe.mitre.org/data/definitions/863.html

https://access.redhat.com/security/cve/CVE-2021-22543

https://access.redhat.com/security/cve/CVE-2021-22555

https://access.redhat.com/security/cve/CVE-2021-37576

https://access.redhat.com/errata/RHSA-2021:3814

https://bugzilla.redhat.com/1965461

https://bugzilla.redhat.com/1980101

https://bugzilla.redhat.com/1986506

Plugin Details

Severity: High

ID: 154070

File Name: redhat-RHSA-2021-3814.nasl

Version: 1.3

Type: local

Agent: unix

Published: 10/13/2021

Updated: 10/15/2021

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

Risk Information

CVSS Score Source: CVE-2021-37576

VPR

Risk Factor: Critical

Score: 9.7

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 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_e4s:7.6, p-cpe:/a:redhat:enterprise_linux:kpatch-patch-3_10_0-957_61_1, p-cpe:/a:redhat:enterprise_linux:kpatch-patch-3_10_0-957_61_2, p-cpe:/a:redhat:enterprise_linux:kpatch-patch-3_10_0-957_62_1, p-cpe:/a:redhat:enterprise_linux:kpatch-patch-3_10_0-957_65_1, p-cpe:/a:redhat:enterprise_linux:kpatch-patch-3_10_0-957_66_1, p-cpe:/a:redhat:enterprise_linux:kpatch-patch-3_10_0-957_70_1, p-cpe:/a:redhat:enterprise_linux:kpatch-patch-3_10_0-957_72_1, p-cpe:/a:redhat:enterprise_linux:kpatch-patch-3_10_0-957_76_1, p-cpe:/a:redhat:enterprise_linux:kpatch-patch-3_10_0-957_78_2, p-cpe:/a:redhat:enterprise_linux:kpatch-patch-3_10_0-957_80_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: 10/12/2021

Vulnerability Publication Date: 4/20/2021

Exploitable With

Metasploit (Netfilter x_tables Heap OOB Write Privilege Escalation)

Reference Information

CVE: CVE-2021-22543, CVE-2021-22555, CVE-2021-37576

RHSA: 2021:3814

CWE: 20, 119, 787, 863