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

high Nessus Plugin ID 154070
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

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

Dependencies: ssh_get_info.nasl, redhat_repos.nasl

Risk Information

CVSS Score Source: CVE-2021-37576

VPR

Risk Factor: Critical

Score: 9.6

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