RHEL 8 : kernel-rt (RHSA-2021:1739) - Nessus

High Plugin ID: 149660

This page contains detailed information about the RHEL 8 : kernel-rt (RHSA-2021:1739) Nessus plugin including available exploits and PoCs found on GitHub, in Metasploit or Exploit-DB for verifying of this vulnerability.

Table Of Contents

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Plugin Overview
Vulnerability Information

Synopsis
Description
Solution

Public Exploits
Risk Information
Plugin Source
How to Run
References
Version

Plugin Overview

ID: 149660
Name: RHEL 8 : kernel-rt (RHSA-2021:1739)
Filename: redhat-RHSA-2021-1739.nasl
Vulnerability Published: 2019-11-13
This Plugin Published: 2021-05-19
Last Modification Time: 2021-10-07
Plugin Version: 1.4
Plugin Type: local
Plugin Family: Red Hat Local Security Checks
Dependencies: linux_alt_patch_detect.nasl, redhat_repos.nasl, ssh_get_info.nasl
Required KB Items [?]: Host/cpu, Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list

Vulnerability Information

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-2021:1739 advisory.

- kernel: use-after-free caused by a malicious USB device in the drivers/usb/misc/adutux.c driver (CVE-2019-19523)

- kernel: use-after-free bug caused by a malicious USB device in the drivers/usb/misc/iowarrior.c driver (CVE-2019-19528)

- kernel: possible out of bounds write in kbd_keycode of keyboard.c (CVE-2020-0431)

- kernel: NULL pointer dereferences in ov511_mode_init_regs and ov518_mode_init_regs in drivers/media/usb/gspca/ov519.c (CVE-2020-11608)

- kernel: DoS by corrupting mountpoint reference counter (CVE-2020-12114)

- kernel: Integer overflow in Intel(R) Graphics Drivers (CVE-2020-12362)

- kernel: Improper input validation in some Intel(R) Graphics Drivers (CVE-2020-12363)

- kernel: Null pointer dereference in some Intel(R) Graphics Drivers (CVE-2020-12364)

- kernel: use-after-free in usb_sg_cancel function in drivers/usb/core/message.c (CVE-2020-12464)

- kernel: buffer uses out of index in ext3/4 filesystem (CVE-2020-14314)

- kernel: Use After Free vulnerability in cgroup BPF component (CVE-2020-14356)

- kernel: NULL pointer dereference in serial8250_isa_init_ports function in drivers/tty/serial/8250/8250_core.c (CVE-2020-15437)

- kernel: umask not applied on filesystem without ACL support (CVE-2020-24394)

- kernel: TOCTOU mismatch in the NFS client code (CVE-2020-25212)

- kernel: incomplete permission checking for access to rbd devices (CVE-2020-25284)

- kernel: race condition between hugetlb sysctl handlers in mm/hugetlb.c (CVE-2020-25285)

- kernel: improper input validation in ppp_cp_parse_cr function leads to memory corruption and read overflow (CVE-2020-25643)

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

- kernel: use-after-free in kernel midi subsystem (CVE-2020-27786)

- kernel: child process is able to access parent mm through hfi dev file handle (CVE-2020-27835)

- kernel: slab-out-of-bounds read in fbcon (CVE-2020-28974)

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

- kernel: use after free in tun_get_user of tun.c could lead to local escalation of privilege (CVE-2021-0342)

- kernel: In pfkey_dump() dplen and splen can both be specified to access the xfrm_address_t structure out of bounds (CVE-2021-0605)

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.

Public Exploits

Target Network Port(s): N/A
Target Asset(s): N/A
Exploit Available: True (GitHub)
Exploit Ease: Exploits (PoCs) are available

Here's the list of publicly known exploits and PoCs for verifying the RHEL 8 : kernel-rt (RHSA-2021:1739) vulnerability:

GitHub: https://github.com/ShaikUsaf/linux-4.19.72_CVE-2020-14356
[CVE-2020-14356]
GitHub: https://github.com/xairy/linux-kernel-exploitation
[CVE-2020-14356]
GitHub: https://github.com/DNTYO/F5_Vulnerability
[CVE-2020-25643]
GitHub: https://github.com/JaskaranNarula/Host_Errata_Info
[CVE-2020-25704]
GitHub: https://github.com/ZIllR0/Routers
[CVE-2020-28974]

Before running any exploit against any system, make sure you are authorized by the owner of the target system(s) to perform such activity. In any other case, this would be considered as an illegal activity.

WARNING: Beware of using unverified exploits from sources such as GitHub or Exploit-DB. These exploits and PoCs could contain malware. For more information, see how to use exploits safely.

Risk Information

CVSS Score Source [?]: CVE-2020-25643
CVSS V2 Vector: AV:N/AC:M/Au:S/C:P/I:P/A:C/E:U/RL:OF/RC:C

CVSS Base Score:	7.5 (High)
Impact Subscore:	8.5
Exploitability Subscore:	6.8
CVSS Temporal Score:	5.5 (Medium)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	5.5 (Medium)

CVSS V3 Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

CVSS Base Score:	7.2 (High)
Impact Subscore:	5.9
Exploitability Subscore:	1.2
CVSS Temporal Score:	6.3 (Medium)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	6.3 (Medium)

Go back to menu.

Plugin Source

#%NASL_MIN_LEVEL 70300
##
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Red Hat Security Advisory RHSA-2021:1739. The text
# itself is copyright (C) Red Hat, Inc.
##

include('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(149660);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/10/07");

  script_cve_id(
    "CVE-2019-19523",
    "CVE-2019-19528",
    "CVE-2020-0431",
    "CVE-2020-11608",
    "CVE-2020-12114",
    "CVE-2020-12362",
    "CVE-2020-12464",
    "CVE-2020-14314",
    "CVE-2020-14356",
    "CVE-2020-15437",
    "CVE-2020-24394",
    "CVE-2020-25212",
    "CVE-2020-25284",
    "CVE-2020-25285",
    "CVE-2020-25643",
    "CVE-2020-25704",
    "CVE-2020-27786",
    "CVE-2020-27835",
    "CVE-2020-28974",
    "CVE-2020-35508",
    "CVE-2021-0342"
  );
  script_xref(name:"RHSA", value:"2021:1739");

  script_name(english:"RHEL 8 : kernel-rt (RHSA-2021:1739)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Red Hat host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as
referenced in the RHSA-2021:1739 advisory.

  - kernel: use-after-free caused by a malicious USB device in the drivers/usb/misc/adutux.c driver
    (CVE-2019-19523)

  - kernel: use-after-free bug caused by a malicious USB device in the drivers/usb/misc/iowarrior.c driver
    (CVE-2019-19528)

  - kernel: possible out of bounds write in kbd_keycode of keyboard.c (CVE-2020-0431)

  - kernel: NULL pointer dereferences in ov511_mode_init_regs and ov518_mode_init_regs in
    drivers/media/usb/gspca/ov519.c (CVE-2020-11608)

  - kernel: DoS by corrupting mountpoint reference counter (CVE-2020-12114)

  - kernel: Integer overflow in Intel(R) Graphics Drivers (CVE-2020-12362)

  - kernel: Improper input validation in some Intel(R) Graphics Drivers (CVE-2020-12363)

  - kernel: Null pointer dereference in some Intel(R) Graphics Drivers (CVE-2020-12364)

  - kernel: use-after-free in usb_sg_cancel function in drivers/usb/core/message.c (CVE-2020-12464)

  - kernel: buffer uses out of index in ext3/4 filesystem (CVE-2020-14314)

  - kernel: Use After Free vulnerability in cgroup BPF component (CVE-2020-14356)

  - kernel: NULL pointer dereference in serial8250_isa_init_ports function in
    drivers/tty/serial/8250/8250_core.c (CVE-2020-15437)

  - kernel: umask not applied on filesystem without ACL support (CVE-2020-24394)

  - kernel: TOCTOU mismatch in the NFS client code (CVE-2020-25212)

  - kernel: incomplete permission checking for access to rbd devices (CVE-2020-25284)

  - kernel: race condition between hugetlb sysctl handlers in mm/hugetlb.c (CVE-2020-25285)

  - kernel: improper input validation in ppp_cp_parse_cr function leads to memory corruption and read overflow
    (CVE-2020-25643)

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

  - kernel: use-after-free in kernel midi subsystem (CVE-2020-27786)

  - kernel: child process is able to access parent mm through hfi dev file handle (CVE-2020-27835)

  - kernel: slab-out-of-bounds read in fbcon (CVE-2020-28974)

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

  - kernel: use after free in tun_get_user of tun.c could lead to local escalation of privilege
    (CVE-2021-0342)

  - kernel: In pfkey_dump() dplen and splen can both be specified to access the xfrm_address_t structure out
    of bounds (CVE-2021-0605)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
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  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:S/C:P/I:P/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-25643");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_cwe_id(20, 119, 125, 190, 284, 362, 367, 400, 416, 476, 665, 732);

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/11/13");
  script_set_attribute(attribute:"patch_publication_date", value:"2021/05/18");
  script_set_attribute(attribute:"plugin_publication_date", value:"2021/05/19");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:8");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:rhel_aus:8.4");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:rhel_e4s:8.4");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:rhel_eus:8.4");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:rhel_tus:8.4");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-core");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-debug");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-debug-core");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-debug-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-debug-kvm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-debug-modules");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-debug-modules-extra");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-kvm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-modules");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-modules-extra");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Red Hat Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2021 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl", "redhat_repos.nasl", "linux_alt_patch_detect.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/RedHat/release", "Host/RedHat/rpm-list", "Host/cpu");

  exit(0);
}


include('audit.inc');
include('global_settings.inc');
include('misc_func.inc');
include('rpm.inc');
include('rhel.inc');
include('ksplice.inc');

if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var release = get_kb_item('Host/RedHat/release');
if (isnull(release) || 'Red Hat' >!< release) audit(AUDIT_OS_NOT, 'Red Hat');
var os_ver = pregmatch(pattern: "Red Hat Enterprise Linux.*release ([0-9]+(\.[0-9]+)?)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'Red Hat');
var os_ver = os_ver[1];
if (!rhel_check_release(operator: 'ge', os_version: os_ver, rhel_version: '8')) audit(AUDIT_OS_NOT, 'Red Hat 8.x', 'Red Hat ' + os_ver);

if (!get_kb_item('Host/RedHat/rpm-list')) audit(AUDIT_PACKAGE_LIST_MISSING);

var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 's390' >!< cpu && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Red Hat', cpu);

var repositories = {
    'enterprise_linux_8_appstream': [
      'rhel-8-for-aarch64-appstream-debug-rpms',
      'rhel-8-for-aarch64-appstream-rpms',
      'rhel-8-for-aarch64-appstream-source-rpms',
      'rhel-8-for-s390x-appstream-debug-rpms',
      'rhel-8-for-s390x-appstream-rpms',
      'rhel-8-for-s390x-appstream-source-rpms',
      'rhel-8-for-x86_64-appstream-debug-rpms',
      'rhel-8-for-x86_64-appstream-rpms',
      'rhel-8-for-x86_64-appstream-source-rpms'
    ],
    'enterprise_linux_8_baseos': [
      'rhel-8-for-aarch64-baseos-debug-rpms',
      'rhel-8-for-aarch64-baseos-rpms',
      'rhel-8-for-aarch64-baseos-source-rpms',
      'rhel-8-for-s390x-baseos-debug-rpms',
      'rhel-8-for-s390x-baseos-rpms',
      'rhel-8-for-s390x-baseos-source-rpms',
      'rhel-8-for-x86_64-baseos-debug-rpms',
      'rhel-8-for-x86_64-baseos-rpms',
      'rhel-8-for-x86_64-baseos-source-rpms'
    ],
    'enterprise_linux_8_crb': [
      'codeready-builder-for-rhel-8-aarch64-debug-rpms',
      'codeready-builder-for-rhel-8-aarch64-eus-debug-rpms',
      'codeready-builder-for-rhel-8-aarch64-eus-rpms',
      'codeready-builder-for-rhel-8-aarch64-eus-source-rpms',
      'codeready-builder-for-rhel-8-aarch64-rpms',
      'codeready-builder-for-rhel-8-aarch64-source-rpms',
      'codeready-builder-for-rhel-8-s390x-debug-rpms',
      'codeready-builder-for-rhel-8-s390x-eus-debug-rpms',
      'codeready-builder-for-rhel-8-s390x-eus-rpms',
      'codeready-builder-for-rhel-8-s390x-eus-source-rpms',
      'codeready-builder-for-rhel-8-s390x-rpms',
      'codeready-builder-for-rhel-8-s390x-source-rpms',
      'codeready-builder-for-rhel-8-x86_64-debug-rpms',
      'codeready-builder-for-rhel-8-x86_64-eus-debug-rpms',
      'codeready-builder-for-rhel-8-x86_64-eus-rpms',
      'codeready-builder-for-rhel-8-x86_64-eus-source-rpms',
      'codeready-builder-for-rhel-8-x86_64-rpms',
      'codeready-builder-for-rhel-8-x86_64-source-rpms'
    ],
    'enterprise_linux_8_highavailability': [
      'rhel-8-for-aarch64-highavailability-debug-rpms',
      'rhel-8-for-aarch64-highavailability-eus-debug-rpms',
      'rhel-8-for-aarch64-highavailability-eus-rpms',
      'rhel-8-for-aarch64-highavailability-eus-source-rpms',
      'rhel-8-for-aarch64-highavailability-rpms',
      'rhel-8-for-aarch64-highavailability-source-rpms',
      'rhel-8-for-s390x-highavailability-debug-rpms',
      'rhel-8-for-s390x-highavailability-eus-debug-rpms',
      'rhel-8-for-s390x-highavailability-eus-rpms',
      'rhel-8-for-s390x-highavailability-eus-source-rpms',
      'rhel-8-for-s390x-highavailability-rpms',
      'rhel-8-for-s390x-highavailability-source-rpms',
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    'rhel_extras_rt_8': [
      'rhel-8-for-x86_64-nfv-debug-rpms',
      'rhel-8-for-x86_64-nfv-rpms',
      'rhel-8-for-x86_64-nfv-source-rpms',
      'rhel-8-for-x86_64-rt-debug-rpms',
      'rhel-8-for-x86_64-rt-rpms',
      'rhel-8-for-x86_64-rt-source-rpms',
      'rhel-8-for-x86_64-rt-tus-debug-rpms',
      'rhel-8-for-x86_64-rt-tus-rpms',
      'rhel-8-for-x86_64-rt-tus-source-rpms'
    ],
    'rhel_tus_8_4_appstream': [
      'rhel-8-for-x86_64-appstream-tus-debug-rpms',
      'rhel-8-for-x86_64-appstream-tus-debug-rpms__8_DOT_4',
      'rhel-8-for-x86_64-appstream-tus-rpms',
      'rhel-8-for-x86_64-appstream-tus-rpms__8_DOT_4',
      'rhel-8-for-x86_64-appstream-tus-source-rpms',
      'rhel-8-for-x86_64-appstream-tus-source-rpms__8_DOT_4'
    ],
    'rhel_tus_8_4_baseos': [
      'rhel-8-for-x86_64-baseos-tus-debug-rpms',
      'rhel-8-for-x86_64-baseos-tus-debug-rpms__8_DOT_4',
      'rhel-8-for-x86_64-baseos-tus-rpms',
      'rhel-8-for-x86_64-baseos-tus-rpms__8_DOT_4',
      'rhel-8-for-x86_64-baseos-tus-source-rpms',
      'rhel-8-for-x86_64-baseos-tus-source-rpms__8_DOT_4'
    ],
    'rhel_tus_8_4_highavailability': [
      'rhel-8-for-x86_64-highavailability-tus-debug-rpms',
      'rhel-8-for-x86_64-highavailability-tus-debug-rpms__8_DOT_4',
      'rhel-8-for-x86_64-highavailability-tus-rpms',
      'rhel-8-for-x86_64-highavailability-tus-rpms__8_DOT_4',
      'rhel-8-for-x86_64-highavailability-tus-source-rpms',
      'rhel-8-for-x86_64-highavailability-tus-source-rpms__8_DOT_4'
    ]
};

var repo_sets = rhel_get_valid_repo_sets(repositories:repositories);
var enterprise_linux_flag = rhel_repo_sets_has_enterprise_linux(repo_sets:repo_sets);
if(repo_sets == RHEL_REPOS_NO_OVERLAP_MESSAGE) audit(AUDIT_PACKAGE_LIST_MISSING, RHEL_REPO_AUDIT_PACKAGE_LIST_DETAILS);

if (get_one_kb_item('Host/ksplice/kernel-cves'))
{
  rm_kb_item(name:'Host/uptrack-uname-r');
  var cve_list = make_list('CVE-2019-19523', 'CVE-2019-19528', 'CVE-2020-0431', 'CVE-2020-11608', 'CVE-2020-12114', 'CVE-2020-12362', 'CVE-2020-12363', 'CVE-2020-12364', 'CVE-2020-12464', 'CVE-2020-14314', 'CVE-2020-14356', 'CVE-2020-15437', 'CVE-2020-24394', 'CVE-2020-25212', 'CVE-2020-25284', 'CVE-2020-25285', 'CVE-2020-25643', 'CVE-2020-25704', 'CVE-2020-27786', 'CVE-2020-27835', 'CVE-2020-28974', 'CVE-2020-35508', 'CVE-2021-0342', 'CVE-2021-0605');
  if (ksplice_cves_check(cve_list))
  {
    audit(AUDIT_PATCH_INSTALLED, 'KSplice hotfix for RHSA-2021:1739');
  }
  else
  {
    __rpm_report = ksplice_reporting_text();
  }
}

var pkgs = [
    {'reference':'kernel-rt-4.18.0-305.rt7.72.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'repo_list':['enterprise_linux_8_appstream', 'enterprise_linux_8_baseos', 'enterprise_linux_8_crb', 'enterprise_linux_8_highavailability', 'enterprise_linux_8_nfv', 'enterprise_linux_8_realtime', 'enterprise_linux_8_resilientstorage', 'enterprise_linux_8_sap', 'enterprise_linux_8_sap_hana', 'enterprise_linux_8_supplementary', 'rhel_aus_8_4_appstream', 'rhel_aus_8_4_baseos', 'rhel_e4s_8_4_appstream', 'rhel_e4s_8_4_baseos', 'rhel_e4s_8_4_highavailability', 'rhel_e4s_8_4_sap', 'rhel_e4s_8_4_sap_hana', 'rhel_eus_8_4_appstream', 'rhel_eus_8_4_baseos', 'rhel_eus_8_4_crb', 'rhel_eus_8_4_highavailability', 'rhel_eus_8_4_resilientstorage', 'rhel_eus_8_4_sap', 'rhel_eus_8_4_sap_hana', 'rhel_eus_8_4_supplementary', 'rhel_extras_nfv_8', 'rhel_extras_rt_8', 'rhel_tus_8_4_appstream', 'rhel_tus_8_4_baseos', 'rhel_tus_8_4_highavailability']},
    {'reference':'kernel-rt-core-4.18.0-305.rt7.72.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'repo_list':['enterprise_linux_8_appstream', 'enterprise_linux_8_baseos', 'enterprise_linux_8_crb', 'enterprise_linux_8_highavailability', 'enterprise_linux_8_nfv', 'enterprise_linux_8_realtime', 'enterprise_linux_8_resilientstorage', 'enterprise_linux_8_sap', 'enterprise_linux_8_sap_hana', 'enterprise_linux_8_supplementary', 'rhel_aus_8_4_appstream', 'rhel_aus_8_4_baseos', 'rhel_e4s_8_4_appstream', 'rhel_e4s_8_4_baseos', 'rhel_e4s_8_4_highavailability', 'rhel_e4s_8_4_sap', 'rhel_e4s_8_4_sap_hana', 'rhel_eus_8_4_appstream', 'rhel_eus_8_4_baseos', 'rhel_eus_8_4_crb', 'rhel_eus_8_4_highavailability', 'rhel_eus_8_4_resilientstorage', 'rhel_eus_8_4_sap', 'rhel_eus_8_4_sap_hana', 'rhel_eus_8_4_supplementary', 'rhel_extras_nfv_8', 'rhel_extras_rt_8', 'rhel_tus_8_4_appstream', 'rhel_tus_8_4_baseos', 'rhel_tus_8_4_highavailability']},
    {'reference':'kernel-rt-debug-4.18.0-305.rt7.72.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'repo_list':['enterprise_linux_8_appstream', 'enterprise_linux_8_baseos', 'enterprise_linux_8_crb', 'enterprise_linux_8_highavailability', 'enterprise_linux_8_nfv', 'enterprise_linux_8_realtime', 'enterprise_linux_8_resilientstorage', 'enterprise_linux_8_sap', 'enterprise_linux_8_sap_hana', 'enterprise_linux_8_supplementary', 'rhel_aus_8_4_appstream', 'rhel_aus_8_4_baseos', 'rhel_e4s_8_4_appstream', 'rhel_e4s_8_4_baseos', 'rhel_e4s_8_4_highavailability', 'rhel_e4s_8_4_sap', 'rhel_e4s_8_4_sap_hana', 'rhel_eus_8_4_appstream', 'rhel_eus_8_4_baseos', 'rhel_eus_8_4_crb', 'rhel_eus_8_4_highavailability', 'rhel_eus_8_4_resilientstorage', 'rhel_eus_8_4_sap', 'rhel_eus_8_4_sap_hana', 'rhel_eus_8_4_supplementary', 'rhel_extras_nfv_8', 'rhel_extras_rt_8', 'rhel_tus_8_4_appstream', 'rhel_tus_8_4_baseos', 'rhel_tus_8_4_highavailability']},
    {'reference':'kernel-rt-debug-core-4.18.0-305.rt7.72.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'repo_list':['enterprise_linux_8_appstream', 'enterprise_linux_8_baseos', 'enterprise_linux_8_crb', 'enterprise_linux_8_highavailability', 'enterprise_linux_8_nfv', 'enterprise_linux_8_realtime', 'enterprise_linux_8_resilientstorage', 'enterprise_linux_8_sap', 'enterprise_linux_8_sap_hana', 'enterprise_linux_8_supplementary', 'rhel_aus_8_4_appstream', 'rhel_aus_8_4_baseos', 'rhel_e4s_8_4_appstream', 'rhel_e4s_8_4_baseos', 'rhel_e4s_8_4_highavailability', 'rhel_e4s_8_4_sap', 'rhel_e4s_8_4_sap_hana', 'rhel_eus_8_4_appstream', 'rhel_eus_8_4_baseos', 'rhel_eus_8_4_crb', 'rhel_eus_8_4_highavailability', 'rhel_eus_8_4_resilientstorage', 'rhel_eus_8_4_sap', 'rhel_eus_8_4_sap_hana', 'rhel_eus_8_4_supplementary', 'rhel_extras_nfv_8', 'rhel_extras_rt_8', 'rhel_tus_8_4_appstream', 'rhel_tus_8_4_baseos', 'rhel_tus_8_4_highavailability']},
    {'reference':'kernel-rt-debug-devel-4.18.0-305.rt7.72.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'repo_list':['enterprise_linux_8_appstream', 'enterprise_linux_8_baseos', 'enterprise_linux_8_crb', 'enterprise_linux_8_highavailability', 'enterprise_linux_8_nfv', 'enterprise_linux_8_realtime', 'enterprise_linux_8_resilientstorage', 'enterprise_linux_8_sap', 'enterprise_linux_8_sap_hana', 'enterprise_linux_8_supplementary', 'rhel_aus_8_4_appstream', 'rhel_aus_8_4_baseos', 'rhel_e4s_8_4_appstream', 'rhel_e4s_8_4_baseos', 'rhel_e4s_8_4_highavailability', 'rhel_e4s_8_4_sap', 'rhel_e4s_8_4_sap_hana', 'rhel_eus_8_4_appstream', 'rhel_eus_8_4_baseos', 'rhel_eus_8_4_crb', 'rhel_eus_8_4_highavailability', 'rhel_eus_8_4_resilientstorage', 'rhel_eus_8_4_sap', 'rhel_eus_8_4_sap_hana', 'rhel_eus_8_4_supplementary', 'rhel_extras_nfv_8', 'rhel_extras_rt_8', 'rhel_tus_8_4_appstream', 'rhel_tus_8_4_baseos', 'rhel_tus_8_4_highavailability']},
    {'reference':'kernel-rt-debug-kvm-4.18.0-305.rt7.72.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'repo_list':['enterprise_linux_8_appstream', 'enterprise_linux_8_baseos', 'enterprise_linux_8_crb', 'enterprise_linux_8_highavailability', 'enterprise_linux_8_nfv', 'enterprise_linux_8_realtime', 'enterprise_linux_8_resilientstorage', 'enterprise_linux_8_sap', 'enterprise_linux_8_sap_hana', 'enterprise_linux_8_supplementary', 'rhel_aus_8_4_appstream', 'rhel_aus_8_4_baseos', 'rhel_e4s_8_4_appstream', 'rhel_e4s_8_4_baseos', 'rhel_e4s_8_4_highavailability', 'rhel_e4s_8_4_sap', 'rhel_e4s_8_4_sap_hana', 'rhel_eus_8_4_appstream', 'rhel_eus_8_4_baseos', 'rhel_eus_8_4_crb', 'rhel_eus_8_4_highavailability', 'rhel_eus_8_4_resilientstorage', 'rhel_eus_8_4_sap', 'rhel_eus_8_4_sap_hana', 'rhel_eus_8_4_supplementary', 'rhel_extras_nfv_8', 'rhel_extras_rt_8', 'rhel_tus_8_4_appstream', 'rhel_tus_8_4_baseos', 'rhel_tus_8_4_highavailability']},
    {'reference':'kernel-rt-debug-modules-4.18.0-305.rt7.72.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'repo_list':['enterprise_linux_8_appstream', 'enterprise_linux_8_baseos', 'enterprise_linux_8_crb', 'enterprise_linux_8_highavailability', 'enterprise_linux_8_nfv', 'enterprise_linux_8_realtime', 'enterprise_linux_8_resilientstorage', 'enterprise_linux_8_sap', 'enterprise_linux_8_sap_hana', 'enterprise_linux_8_supplementary', 'rhel_aus_8_4_appstream', 'rhel_aus_8_4_baseos', 'rhel_e4s_8_4_appstream', 'rhel_e4s_8_4_baseos', 'rhel_e4s_8_4_highavailability', 'rhel_e4s_8_4_sap', 'rhel_e4s_8_4_sap_hana', 'rhel_eus_8_4_appstream', 'rhel_eus_8_4_baseos', 'rhel_eus_8_4_crb', 'rhel_eus_8_4_highavailability', 'rhel_eus_8_4_resilientstorage', 'rhel_eus_8_4_sap', 'rhel_eus_8_4_sap_hana', 'rhel_eus_8_4_supplementary', 'rhel_extras_nfv_8', 'rhel_extras_rt_8', 'rhel_tus_8_4_appstream', 'rhel_tus_8_4_baseos', 'rhel_tus_8_4_highavailability']},
    {'reference':'kernel-rt-debug-modules-extra-4.18.0-305.rt7.72.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'repo_list':['enterprise_linux_8_appstream', 'enterprise_linux_8_baseos', 'enterprise_linux_8_crb', 'enterprise_linux_8_highavailability', 'enterprise_linux_8_nfv', 'enterprise_linux_8_realtime', 'enterprise_linux_8_resilientstorage', 'enterprise_linux_8_sap', 'enterprise_linux_8_sap_hana', 'enterprise_linux_8_supplementary', 'rhel_aus_8_4_appstream', 'rhel_aus_8_4_baseos', 'rhel_e4s_8_4_appstream', 'rhel_e4s_8_4_baseos', 'rhel_e4s_8_4_highavailability', 'rhel_e4s_8_4_sap', 'rhel_e4s_8_4_sap_hana', 'rhel_eus_8_4_appstream', 'rhel_eus_8_4_baseos', 'rhel_eus_8_4_crb', 'rhel_eus_8_4_highavailability', 'rhel_eus_8_4_resilientstorage', 'rhel_eus_8_4_sap', 'rhel_eus_8_4_sap_hana', 'rhel_eus_8_4_supplementary', 'rhel_extras_nfv_8', 'rhel_extras_rt_8', 'rhel_tus_8_4_appstream', 'rhel_tus_8_4_baseos', 'rhel_tus_8_4_highavailability']},
    {'reference':'kernel-rt-devel-4.18.0-305.rt7.72.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'repo_list':['enterprise_linux_8_appstream', 'enterprise_linux_8_baseos', 'enterprise_linux_8_crb', 'enterprise_linux_8_highavailability', 'enterprise_linux_8_nfv', 'enterprise_linux_8_realtime', 'enterprise_linux_8_resilientstorage', 'enterprise_linux_8_sap', 'enterprise_linux_8_sap_hana', 'enterprise_linux_8_supplementary', 'rhel_aus_8_4_appstream', 'rhel_aus_8_4_baseos', 'rhel_e4s_8_4_appstream', 'rhel_e4s_8_4_baseos', 'rhel_e4s_8_4_highavailability', 'rhel_e4s_8_4_sap', 'rhel_e4s_8_4_sap_hana', 'rhel_eus_8_4_appstream', 'rhel_eus_8_4_baseos', 'rhel_eus_8_4_crb', 'rhel_eus_8_4_highavailability', 'rhel_eus_8_4_resilientstorage', 'rhel_eus_8_4_sap', 'rhel_eus_8_4_sap_hana', 'rhel_eus_8_4_supplementary', 'rhel_extras_nfv_8', 'rhel_extras_rt_8', 'rhel_tus_8_4_appstream', 'rhel_tus_8_4_baseos', 'rhel_tus_8_4_highavailability']},
    {'reference':'kernel-rt-kvm-4.18.0-305.rt7.72.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'repo_list':['enterprise_linux_8_appstream', 'enterprise_linux_8_baseos', 'enterprise_linux_8_crb', 'enterprise_linux_8_highavailability', 'enterprise_linux_8_nfv', 'enterprise_linux_8_realtime', 'enterprise_linux_8_resilientstorage', 'enterprise_linux_8_sap', 'enterprise_linux_8_sap_hana', 'enterprise_linux_8_supplementary', 'rhel_aus_8_4_appstream', 'rhel_aus_8_4_baseos', 'rhel_e4s_8_4_appstream', 'rhel_e4s_8_4_baseos', 'rhel_e4s_8_4_highavailability', 'rhel_e4s_8_4_sap', 'rhel_e4s_8_4_sap_hana', 'rhel_eus_8_4_appstream', 'rhel_eus_8_4_baseos', 'rhel_eus_8_4_crb', 'rhel_eus_8_4_highavailability', 'rhel_eus_8_4_resilientstorage', 'rhel_eus_8_4_sap', 'rhel_eus_8_4_sap_hana', 'rhel_eus_8_4_supplementary', 'rhel_extras_nfv_8', 'rhel_extras_rt_8', 'rhel_tus_8_4_appstream', 'rhel_tus_8_4_baseos', 'rhel_tus_8_4_highavailability']},
    {'reference':'kernel-rt-modules-4.18.0-305.rt7.72.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'repo_list':['enterprise_linux_8_appstream', 'enterprise_linux_8_baseos', 'enterprise_linux_8_crb', 'enterprise_linux_8_highavailability', 'enterprise_linux_8_nfv', 'enterprise_linux_8_realtime', 'enterprise_linux_8_resilientstorage', 'enterprise_linux_8_sap', 'enterprise_linux_8_sap_hana', 'enterprise_linux_8_supplementary', 'rhel_aus_8_4_appstream', 'rhel_aus_8_4_baseos', 'rhel_e4s_8_4_appstream', 'rhel_e4s_8_4_baseos', 'rhel_e4s_8_4_highavailability', 'rhel_e4s_8_4_sap', 'rhel_e4s_8_4_sap_hana', 'rhel_eus_8_4_appstream', 'rhel_eus_8_4_baseos', 'rhel_eus_8_4_crb', 'rhel_eus_8_4_highavailability', 'rhel_eus_8_4_resilientstorage', 'rhel_eus_8_4_sap', 'rhel_eus_8_4_sap_hana', 'rhel_eus_8_4_supplementary', 'rhel_extras_nfv_8', 'rhel_extras_rt_8', 'rhel_tus_8_4_appstream', 'rhel_tus_8_4_baseos', 'rhel_tus_8_4_highavailability']},
    {'reference':'kernel-rt-modules-extra-4.18.0-305.rt7.72.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'repo_list':['enterprise_linux_8_appstream', 'enterprise_linux_8_baseos', 'enterprise_linux_8_crb', 'enterprise_linux_8_highavailability', 'enterprise_linux_8_nfv', 'enterprise_linux_8_realtime', 'enterprise_linux_8_resilientstorage', 'enterprise_linux_8_sap', 'enterprise_linux_8_sap_hana', 'enterprise_linux_8_supplementary', 'rhel_aus_8_4_appstream', 'rhel_aus_8_4_baseos', 'rhel_e4s_8_4_appstream', 'rhel_e4s_8_4_baseos', 'rhel_e4s_8_4_highavailability', 'rhel_e4s_8_4_sap', 'rhel_e4s_8_4_sap_hana', 'rhel_eus_8_4_appstream', 'rhel_eus_8_4_baseos', 'rhel_eus_8_4_crb', 'rhel_eus_8_4_highavailability', 'rhel_eus_8_4_resilientstorage', 'rhel_eus_8_4_sap', 'rhel_eus_8_4_sap_hana', 'rhel_eus_8_4_supplementary', 'rhel_extras_nfv_8', 'rhel_extras_rt_8', 'rhel_tus_8_4_appstream', 'rhel_tus_8_4_baseos', 'rhel_tus_8_4_highavailability']}
];

var flag = 0;
foreach package_array ( pkgs ) {
  var reference = NULL;
  var release = NULL;
  var sp = NULL;
  var cpu = NULL;
  var el_string = NULL;
  var rpm_spec_vers_cmp = NULL;
  var epoch = NULL;
  var allowmaj = NULL;
  var exists_check = NULL;
  var repo_list = NULL;
  if (!empty_or_null(package_array['repo_list'])) repo_list = package_array['repo_list'];
  if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
  if (!empty_or_null(package_array['release'])) release = 'RHEL' + package_array['release'];
  if (!empty_or_null(package_array['sp']) && !enterprise_linux_flag) sp = package_array['sp'];
  if (!empty_or_null(package_array['cpu'])) cpu = package_array['cpu'];
  if (!empty_or_null(package_array['el_string'])) el_string = package_array['el_string'];
  if (!empty_or_null(package_array['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = package_array['rpm_spec_vers_cmp'];
  if (!empty_or_null(package_array['epoch'])) epoch = package_array['epoch'];
  if (!empty_or_null(package_array['allowmaj'])) allowmaj = package_array['allowmaj'];
  if (!empty_or_null(package_array['exists_check'])) exists_check = package_array['exists_check'];
  if (reference &&
      release &&
      (rhel_decide_repo_check(repo_list:repo_list, repo_sets:repo_sets) || (!exists_check || rpm_exists(release:release, rpm:exists_check))) &&
      rpm_check(release:release, sp:sp, cpu:cpu, reference:reference, epoch:epoch, el_string:el_string, rpm_spec_vers_cmp:rpm_spec_vers_cmp, allowmaj:allowmaj)) flag++;
}

if (flag)
{
  var extra = NULL;
  if (empty_or_null(repo_sets)) extra = rpm_report_get() + redhat_report_repo_caveat();
  else extra = rpm_report_get() + redhat_report_package_caveat();
  security_report_v4(
      port       : 0,
      severity   : SECURITY_HOLE,
      extra      : extra
  );
  exit(0);
}
else
{
  var tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'kernel-rt / kernel-rt-core / kernel-rt-debug / kernel-rt-debug-core / etc');
}

The latest version of this script can be found in these locations depending on your platform:

Linux / Unix:
/opt/nessus/lib/nessus/plugins/redhat-RHSA-2021-1739.nasl
Windows:
C:\ProgramData\Tenable\Nessus\nessus\plugins\redhat-RHSA-2021-1739.nasl
Mac OS X:
/Library/Nessus/run/lib/nessus/plugins/redhat-RHSA-2021-1739.nasl

Go back to menu.

How to Run

Here is how to run the RHEL 8 : kernel-rt (RHSA-2021:1739) as a standalone plugin via the Nessus web user interface (https://localhost:8834/):

Click to start a New Scan.
Select Advanced Scan.
Navigate to the Plugins tab.
On the top right corner click to Disable All plugins.
On the left side table select Red Hat Local Security Checks plugin family.
On the right side table select RHEL 8 : kernel-rt (RHSA-2021:1739) plugin ID 149660.
Specify the target on the Settings tab and click to Save the scan.
Run the scan.

Here are a few examples of how to run the plugin in the command line. Note that the examples below demonstrate the usage on the Linux / Unix platform.

Basic usage:

/opt/nessus/bin/nasl redhat-RHSA-2021-1739.nasl -t <IP/HOST>

Run the plugin with audit trail message on the console:

/opt/nessus/bin/nasl -a redhat-RHSA-2021-1739.nasl -t <IP/HOST>

Run the plugin with trace script execution written to the console (useful for debugging):

/opt/nessus/bin/nasl -T - redhat-RHSA-2021-1739.nasl -t <IP/HOST>

Run the plugin with using a state file for the target and updating it (useful for running multiple plugins on the target):

/opt/nessus/bin/nasl -K /tmp/state redhat-RHSA-2021-1739.nasl -t <IP/HOST>

Go back to menu.

References

RHSA | Red Hat Security Advisory:

2021:1739

CWE | Common Weakness Enumeration:

CWE-20 (Weakness) Improper Input Validation
CWE-119 (Weakness) Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-125 (Weakness) Out-of-bounds Read
CWE-190 (Weakness) Integer Overflow or Wraparound
CWE-284 (Weakness) Improper Access Control
CWE-362 (Weakness) Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CWE-367 (Weakness) Time-of-check Time-of-use (TOCTOU) Race Condition
CWE-400 (Weakness) Uncontrolled Resource Consumption
CWE-416 (Weakness) Use After Free
CWE-476 (Weakness) NULL Pointer Dereference
CWE-665 (Weakness) Improper Initialization
CWE-732 (Weakness) Incorrect Permission Assignment for Critical Resource

See also:

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Version

This page has been produced using Nessus Professional 10.1.2 (#68) LINUX, Plugin set 202205072148.
Plugin file redhat-RHSA-2021-1739.nasl version 1.4. For more plugins, visit the Nessus Plugin Library.

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RHEL 8 : kernel-rt (RHSA-2021:1739) - Nessus

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