RHEL 7 : kernel-rt (RHSA-2021:0857) - Nessus

High   Plugin ID: 147827

This page contains detailed information about the RHEL 7 : kernel-rt (RHSA-2021:0857) 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

ID: 147827
Name: RHEL 7 : kernel-rt (RHSA-2021:0857)
Filename: redhat-RHSA-2021-0857.nasl
Vulnerability Published: 2019-12-03
This Plugin Published: 2021-03-17
Last Modification Time: 2021-10-07
Plugin Version: 1.7
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

Severity: High
Vulnerability Published: 2019-12-03
Patch Published: 2021-03-16
CVE [?]: CVE-2019-19532, CVE-2020-0427, CVE-2020-7053, CVE-2020-14351, CVE-2020-25211, CVE-2020-25645, CVE-2020-25656, CVE-2020-25705, CVE-2020-28374, CVE-2020-29661, CVE-2021-20265
CPE [?]: cpe:/o:redhat:enterprise_linux:7, p-cpe:/a:redhat:enterprise_linux:kernel-rt, p-cpe:/a:redhat:enterprise_linux:kernel-rt-debug, p-cpe:/a:redhat:enterprise_linux:kernel-rt-debug-devel, p-cpe:/a:redhat:enterprise_linux:kernel-rt-debug-kvm, p-cpe:/a:redhat:enterprise_linux:kernel-rt-devel, p-cpe:/a:redhat:enterprise_linux:kernel-rt-doc, p-cpe:/a:redhat:enterprise_linux:kernel-rt-kvm, p-cpe:/a:redhat:enterprise_linux:kernel-rt-trace, p-cpe:/a:redhat:enterprise_linux:kernel-rt-trace-devel, p-cpe:/a:redhat:enterprise_linux:kernel-rt-trace-kvm

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-2021:0857 advisory.

- kernel: malicious USB devices can lead to multiple out-of-bounds write (CVE-2019-19532)

- kernel: out-of-bounds reads in pinctrl subsystem. (CVE-2020-0427)

- kernel: performance counters race condition use-after-free (CVE-2020-14351)

- kernel: Local buffer overflow in ctnetlink_parse_tuple_filter in net/netfilter/nf_conntrack_netlink.c (CVE-2020-25211)

- kernel: Geneve/IPsec traffic may be unencrypted between two Geneve endpoints (CVE-2020-25645)

- kernel: use-after-free in read in vt_do_kdgkb_ioctl (CVE-2020-25656)

- kernel: ICMP rate limiting can be used for DNS poisoning attack (CVE-2020-25705)

- kernel: SCSI target (LIO) write to any block on ILO backstore (CVE-2020-28374)

- kernel: locking issue in drivers/tty/tty_jobctrl.c can lead to an use-after-free (CVE-2020-29661)

- kernel: use-after-free in i915_ppgtt_close in drivers/gpu/drm/i915/i915_gem_gtt.c (CVE-2020-7053)

- kernel: increase slab leak leads to DoS (CVE-2021-20265)

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 are available

Here's the list of publicly known exploits and PoCs for verifying the RHEL 7 : kernel-rt (RHSA-2021:0857) vulnerability:

  1. GitHub: https://github.com/EGI-Federation/SVG-advisories
    [CVE-2020-25211]
  2. GitHub: https://github.com/nanopathi/linux-4.19.72_CVE-2020-25705
    [CVE-2020-25705]
  3. GitHub: https://github.com/tdwyer/CVE-2020-25705
    [CVE-2020-25705: PoC for CVE-2020-25705 POC-2020-25705]

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-2020-29661
CVSS V2 Vector: AV:L/AC:L/Au:N/C:C/I:C/A:C/E:POC/RL:OF/RC:C
CVSS Base Score:7.2 (High)
Impact Subscore:10.0
Exploitability Subscore:3.9
CVSS Temporal Score:5.6 (Medium)
CVSS Environmental Score:NA (None)
Modified Impact Subscore:NA
Overall CVSS Score:5.6 (Medium)
CVSS V3 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
CVSS Base Score:7.8 (High)
Impact Subscore:5.9
Exploitability Subscore:1.8
CVSS Temporal Score:7.0 (High)
CVSS Environmental Score:NA (None)
Modified Impact Subscore:NA
Overall CVSS Score:7.0 (High)

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Plugin Source

This is the redhat-RHSA-2021-0857.nasl nessus plugin source code. This script is Copyright (C) 2021 and is owned by Tenable, Inc. or an Affiliate thereof. 

##
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Red Hat Security Advisory RHSA-2021:0857. The text
# itself is copyright (C) Red Hat, Inc.
##

include('compat.inc');

if (description)
{
  script_id(147827);
  script_version("1.7");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/10/07");

  script_cve_id(
    "CVE-2019-19532",
    "CVE-2020-0427",
    "CVE-2020-7053",
    "CVE-2020-14351",
    "CVE-2020-25211",
    "CVE-2020-25645",
    "CVE-2020-25656",
    "CVE-2020-25705",
    "CVE-2020-28374",
    "CVE-2020-29661",
    "CVE-2021-20265"
  );
  script_xref(name:"RHSA", value:"2021:0857");

  script_name(english:"RHEL 7 : kernel-rt (RHSA-2021:0857)");

  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 7 host has packages installed that are affected by multiple vulnerabilities as
referenced in the RHSA-2021:0857 advisory.

  - kernel: malicious USB devices can lead to multiple out-of-bounds write (CVE-2019-19532)

  - kernel: out-of-bounds reads in pinctrl subsystem. (CVE-2020-0427)

  - kernel: performance counters race condition use-after-free (CVE-2020-14351)

  - kernel: Local buffer overflow in ctnetlink_parse_tuple_filter in net/netfilter/nf_conntrack_netlink.c
    (CVE-2020-25211)

  - kernel: Geneve/IPsec traffic may be unencrypted between two Geneve endpoints (CVE-2020-25645)

  - kernel: use-after-free in read in vt_do_kdgkb_ioctl (CVE-2020-25656)

  - kernel: ICMP rate limiting can be used for DNS poisoning attack (CVE-2020-25705)

  - kernel: SCSI target (LIO) write to any block on ILO backstore (CVE-2020-28374)

  - kernel: locking issue in drivers/tty/tty_jobctrl.c can lead to an use-after-free (CVE-2020-29661)

  - kernel: use-after-free in i915_ppgtt_close in drivers/gpu/drm/i915/i915_gem_gtt.c (CVE-2020-7053)

  - kernel: increase slab leak leads to DoS (CVE-2021-20265)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://cwe.mitre.org/data/definitions/20.html");
  script_set_attribute(attribute:"see_also", value:"https://cwe.mitre.org/data/definitions/119.html");
  script_set_attribute(attribute:"see_also", value:"https://cwe.mitre.org/data/definitions/200.html");
  script_set_attribute(attribute:"see_also", value:"https://cwe.mitre.org/data/definitions/319.html");
  script_set_attribute(attribute:"see_also", value:"https://cwe.mitre.org/data/definitions/330.html");
  script_set_attribute(attribute:"see_also", value:"https://cwe.mitre.org/data/definitions/400.html");
  script_set_attribute(attribute:"see_also", value:"https://cwe.mitre.org/data/definitions/416.html");
  script_set_attribute(attribute:"see_also", value:"https://cwe.mitre.org/data/definitions/667.html");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/CVE-2019-19532");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/CVE-2020-0427");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/CVE-2020-7053");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/CVE-2020-14351");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/CVE-2020-25211");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/CVE-2020-25645");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/CVE-2020-25656");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/CVE-2020-25705");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/CVE-2020-28374");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/CVE-2020-29661");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/CVE-2021-20265");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/errata/RHSA-2021:0857");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/1781821");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/1795624");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/1862849");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/1877571");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/1883988");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/1888726");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/1894579");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/1899804");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/1906525");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/1908827");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/1919893");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-29661");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_cwe_id(20, 119, 200, 319, 330, 400, 416, 667);

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/12/03");
  script_set_attribute(attribute:"patch_publication_date", value:"2021/03/16");
  script_set_attribute(attribute:"plugin_publication_date", value:"2021/03/17");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:7");
  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-debug");
  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-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-doc");
  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-trace");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-trace-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-trace-kvm");
  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: '7')) audit(AUDIT_OS_NOT, 'Red Hat 7.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_7_client': [
      'rhel-7-desktop-debug-rpms',
      'rhel-7-desktop-fastrack-debug-rpms',
      'rhel-7-desktop-fastrack-rpms',
      'rhel-7-desktop-fastrack-source-rpms',
      'rhel-7-desktop-optional-debug-rpms',
      'rhel-7-desktop-optional-fastrack-debug-rpms',
      'rhel-7-desktop-optional-fastrack-rpms',
      'rhel-7-desktop-optional-fastrack-source-rpms',
      'rhel-7-desktop-optional-rpms',
      'rhel-7-desktop-optional-source-rpms',
      'rhel-7-desktop-rpms',
      'rhel-7-desktop-source-rpms'
    ],
    'enterprise_linux_7_computenode': [
      'rhel-7-for-hpc-node-fastrack-debug-rpms',
      'rhel-7-for-hpc-node-fastrack-rpms',
      'rhel-7-for-hpc-node-fastrack-source-rpms',
      'rhel-7-for-hpc-node-optional-fastrack-debug-rpms',
      'rhel-7-for-hpc-node-optional-fastrack-rpms',
      'rhel-7-for-hpc-node-optional-fastrack-source-rpms',
      'rhel-7-hpc-node-debug-rpms',
      'rhel-7-hpc-node-optional-debug-rpms',
      'rhel-7-hpc-node-optional-rpms',
      'rhel-7-hpc-node-optional-source-rpms',
      'rhel-7-hpc-node-rpms',
      'rhel-7-hpc-node-source-rpms'
    ],
    'enterprise_linux_7_server': [
      'rhel-7-server-debug-rpms',
      'rhel-7-server-fastrack-debug-rpms',
      'rhel-7-server-fastrack-rpms',
      'rhel-7-server-fastrack-source-rpms',
      'rhel-7-server-optional-debug-rpms',
      'rhel-7-server-optional-fastrack-debug-rpms',
      'rhel-7-server-optional-fastrack-rpms',
      'rhel-7-server-optional-fastrack-source-rpms',
      'rhel-7-server-optional-rpms',
      'rhel-7-server-optional-source-rpms',
      'rhel-7-server-rpms',
      'rhel-7-server-source-rpms',
      'rhel-ha-for-rhel-7-server-debug-rpms',
      'rhel-ha-for-rhel-7-server-rpms',
      'rhel-ha-for-rhel-7-server-source-rpms',
      'rhel-rs-for-rhel-7-server-debug-rpms',
      'rhel-rs-for-rhel-7-server-rpms',
      'rhel-rs-for-rhel-7-server-source-rpms'
    ],
    'enterprise_linux_7_workstation': [
      'rhel-7-workstation-debug-rpms',
      'rhel-7-workstation-fastrack-debug-rpms',
      'rhel-7-workstation-fastrack-rpms',
      'rhel-7-workstation-fastrack-source-rpms',
      'rhel-7-workstation-optional-debug-rpms',
      'rhel-7-workstation-optional-fastrack-debug-rpms',
      'rhel-7-workstation-optional-fastrack-rpms',
      'rhel-7-workstation-optional-fastrack-source-rpms',
      'rhel-7-workstation-optional-rpms',
      'rhel-7-workstation-optional-source-rpms',
      'rhel-7-workstation-rpms',
      'rhel-7-workstation-source-rpms'
    ],
    'rhel_extras_7': [
      'rhel-7-desktop-supplementary-rpms',
      'rhel-7-desktop-supplementary-source-rpms',
      'rhel-7-for-hpc-node-supplementary-rpms',
      'rhel-7-for-hpc-node-supplementary-source-rpms',
      'rhel-7-hpc-node-eus-supplementary-rpms',
      'rhel-7-server-eus-supplementary-rpms',
      'rhel-7-server-supplementary-rpms',
      'rhel-7-server-supplementary-source-rpms',
      'rhel-7-workstation-supplementary-rpms',
      'rhel-7-workstation-supplementary-source-rpms'
    ],
    'rhel_extras_oracle_java_7': [
      'rhel-7-desktop-restricted-maintenance-oracle-java-rpms',
      'rhel-7-for-hpc-node-restricted-maintenance-oracle-java-rpms',
      'rhel-7-hpc-node-eus-restricted-maintenance-oracle-java-rpms',
      'rhel-7-server-eus-restricted-maintenance-oracle-java-rpms',
      'rhel-7-server-eus-restricted-maintenance-oracle-java-source-rpms',
      'rhel-7-server-restricted-maintenance-oracle-java-rpms',
      'rhel-7-workstation-restricted-maintenance-oracle-java-rpms'
    ],
    'rhel_extras_rt_7': [
      'rhel-7-server-nfv-debug-rpms',
      'rhel-7-server-nfv-rpms',
      'rhel-7-server-nfv-source-rpms',
      'rhel-7-server-rt-debug-rpms',
      'rhel-7-server-rt-rpms',
      'rhel-7-server-rt-source-rpms'
    ],
    'rhel_extras_sap_7': [
      'rhel-sap-for-rhel-7-server-debug-rpms',
      'rhel-sap-for-rhel-7-server-e4s-debug-rpms',
      'rhel-sap-for-rhel-7-server-e4s-rpms',
      'rhel-sap-for-rhel-7-server-e4s-source-rpms',
      'rhel-sap-for-rhel-7-server-eus-debug-rpms',
      'rhel-sap-for-rhel-7-server-eus-rpms',
      'rhel-sap-for-rhel-7-server-eus-source-rpms',
      'rhel-sap-for-rhel-7-server-rpms',
      'rhel-sap-for-rhel-7-server-source-rpms'
    ],
    'rhel_extras_sap_hana_7': [
      'rhel-sap-hana-for-rhel-7-server-debug-rpms',
      'rhel-sap-hana-for-rhel-7-server-e4s-debug-rpms',
      'rhel-sap-hana-for-rhel-7-server-e4s-rpms',
      'rhel-sap-hana-for-rhel-7-server-e4s-source-rpms',
      'rhel-sap-hana-for-rhel-7-server-eus-debug-rpms',
      'rhel-sap-hana-for-rhel-7-server-eus-rpms',
      'rhel-sap-hana-for-rhel-7-server-eus-source-rpms',
      'rhel-sap-hana-for-rhel-7-server-rpms',
      'rhel-sap-hana-for-rhel-7-server-source-rpms'
    ]
};

var repo_sets = rhel_get_valid_repo_sets(repositories:repositories);
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-2019-19532', 'CVE-2020-0427', 'CVE-2020-7053', 'CVE-2020-14351', 'CVE-2020-25211', 'CVE-2020-25645', 'CVE-2020-25656', 'CVE-2020-25705', 'CVE-2020-28374', 'CVE-2020-29661', 'CVE-2021-20265');
  if (ksplice_cves_check(cve_list))
  {
    audit(AUDIT_PATCH_INSTALLED, 'KSplice hotfix for RHSA-2021:0857');
  }
  else
  {
    __rpm_report = ksplice_reporting_text();
  }
}

var pkgs = [
    {'reference':'kernel-rt-3.10.0-1160.21.1.rt56.1158.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE, 'repo_list':['enterprise_linux_7_client', 'enterprise_linux_7_computenode', 'enterprise_linux_7_server', 'enterprise_linux_7_workstation', 'rhel_extras_7', 'rhel_extras_oracle_java_7', 'rhel_extras_rt_7', 'rhel_extras_sap_7', 'rhel_extras_sap_hana_7']},
    {'reference':'kernel-rt-debug-3.10.0-1160.21.1.rt56.1158.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE, 'repo_list':['enterprise_linux_7_client', 'enterprise_linux_7_computenode', 'enterprise_linux_7_server', 'enterprise_linux_7_workstation', 'rhel_extras_7', 'rhel_extras_oracle_java_7', 'rhel_extras_rt_7', 'rhel_extras_sap_7', 'rhel_extras_sap_hana_7']},
    {'reference':'kernel-rt-debug-devel-3.10.0-1160.21.1.rt56.1158.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE, 'repo_list':['enterprise_linux_7_client', 'enterprise_linux_7_computenode', 'enterprise_linux_7_server', 'enterprise_linux_7_workstation', 'rhel_extras_7', 'rhel_extras_oracle_java_7', 'rhel_extras_rt_7', 'rhel_extras_sap_7', 'rhel_extras_sap_hana_7']},
    {'reference':'kernel-rt-debug-kvm-3.10.0-1160.21.1.rt56.1158.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE, 'repo_list':['enterprise_linux_7_client', 'enterprise_linux_7_computenode', 'enterprise_linux_7_server', 'enterprise_linux_7_workstation', 'rhel_extras_7', 'rhel_extras_oracle_java_7', 'rhel_extras_rt_7', 'rhel_extras_sap_7', 'rhel_extras_sap_hana_7']},
    {'reference':'kernel-rt-devel-3.10.0-1160.21.1.rt56.1158.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE, 'repo_list':['enterprise_linux_7_client', 'enterprise_linux_7_computenode', 'enterprise_linux_7_server', 'enterprise_linux_7_workstation', 'rhel_extras_7', 'rhel_extras_oracle_java_7', 'rhel_extras_rt_7', 'rhel_extras_sap_7', 'rhel_extras_sap_hana_7']},
    {'reference':'kernel-rt-doc-3.10.0-1160.21.1.rt56.1158.el7', 'release':'7', 'rpm_spec_vers_cmp':TRUE, 'repo_list':['enterprise_linux_7_client', 'enterprise_linux_7_computenode', 'enterprise_linux_7_server', 'enterprise_linux_7_workstation', 'rhel_extras_7', 'rhel_extras_oracle_java_7', 'rhel_extras_rt_7', 'rhel_extras_sap_7', 'rhel_extras_sap_hana_7']},
    {'reference':'kernel-rt-kvm-3.10.0-1160.21.1.rt56.1158.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE, 'repo_list':['enterprise_linux_7_client', 'enterprise_linux_7_computenode', 'enterprise_linux_7_server', 'enterprise_linux_7_workstation', 'rhel_extras_7', 'rhel_extras_oracle_java_7', 'rhel_extras_rt_7', 'rhel_extras_sap_7', 'rhel_extras_sap_hana_7']},
    {'reference':'kernel-rt-trace-3.10.0-1160.21.1.rt56.1158.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE, 'repo_list':['enterprise_linux_7_client', 'enterprise_linux_7_computenode', 'enterprise_linux_7_server', 'enterprise_linux_7_workstation', 'rhel_extras_7', 'rhel_extras_oracle_java_7', 'rhel_extras_rt_7', 'rhel_extras_sap_7', 'rhel_extras_sap_hana_7']},
    {'reference':'kernel-rt-trace-devel-3.10.0-1160.21.1.rt56.1158.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE, 'repo_list':['enterprise_linux_7_client', 'enterprise_linux_7_computenode', 'enterprise_linux_7_server', 'enterprise_linux_7_workstation', 'rhel_extras_7', 'rhel_extras_oracle_java_7', 'rhel_extras_rt_7', 'rhel_extras_sap_7', 'rhel_extras_sap_hana_7']},
    {'reference':'kernel-rt-trace-kvm-3.10.0-1160.21.1.rt56.1158.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE, 'repo_list':['enterprise_linux_7_client', 'enterprise_linux_7_computenode', 'enterprise_linux_7_server', 'enterprise_linux_7_workstation', 'rhel_extras_7', 'rhel_extras_oracle_java_7', 'rhel_extras_rt_7', 'rhel_extras_sap_7', 'rhel_extras_sap_hana_7']}
];

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'])) 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-debug / kernel-rt-debug-devel / 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-2021-0857.nasl
  • Windows:
    C:\ProgramData\Tenable\Nessus\nessus\plugins\redhat-RHSA-2021-0857.nasl
  • Mac OS X:
    /Library/Nessus/run/lib/nessus/plugins/redhat-RHSA-2021-0857.nasl

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How to Run

Here is how to run the RHEL 7 : kernel-rt (RHSA-2021:0857) as a standalone plugin via the Nessus web user interface (https://localhost:8834/):

  1. Click to start a New Scan.
  2. Select Advanced Scan.
  3. Navigate to the Plugins tab.
  4. On the top right corner click to Disable All plugins.
  5. On the left side table select Red Hat Local Security Checks plugin family.
  6. On the right side table select RHEL 7 : kernel-rt (RHSA-2021:0857) plugin ID 147827.
  7. Specify the target on the Settings tab and click to Save the scan.
  8. 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-2021-0857.nasl -t <IP/HOST>

Run the plugin with audit trail message on the console:

/opt/nessus/bin/nasl -a redhat-RHSA-2021-0857.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-2021-0857.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-2021-0857.nasl -t <IP/HOST>

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References

RHSA | Red Hat Security Advisory: 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-200 (Weakness) Exposure of Sensitive Information to an Unauthorized Actor
  • CWE-319 (Weakness) Cleartext Transmission of Sensitive Information
  • CWE-330 (Weakness) Use of Insufficiently Random Values
  • CWE-400 (Weakness) Uncontrolled Resource Consumption
  • CWE-416 (Weakness) Use After Free
  • CWE-667 (Weakness) Improper Locking
See also: Similar and related Nessus plugins:
  • 146511 - SUSE SLES12 Security Update : kernel (SUSE-SU-2021:0452-1)
  • 146512 - Debian DLA-2557-1 : linux-4.19 security update
  • 146535 - RHEL 8 : kernel (RHSA-2021:0558)
  • 146551 - RHEL 8 : kernel-rt (RHSA-2021:0537)
  • 146568 - Oracle Linux 8 : kernel (ELSA-2021-0558)
  • 146569 - Amazon Linux AMI : kernel (ALAS-2021-1480)
  • 146631 - Amazon Linux 2 : kernel (ALAS-2021-1600)
  • 146701 - EulerOS 2.0 SP2 : kernel (EulerOS-SA-2021-1311)
  • 147011 - RHEL 8 : kernel (RHSA-2021:0686)
  • 147207 - RHEL 8 : kernel (RHSA-2021:0765)
  • 147212 - RHEL 8 : kernel-rt (RHSA-2021:0774)
  • 147215 - RHEL 8 : kpatch-patch (RHSA-2021:0763)
  • 147512 - EulerOS Virtualization 2.9.1 : kernel (EulerOS-SA-2021-1604)
  • 147532 - Debian DLA-2586-1 : linux security update
  • 147559 - EulerOS Virtualization 3.0.6.6 : kernel (EulerOS-SA-2021-1454)
  • 147588 - EulerOS Virtualization for ARM 64 3.0.2.0 : kernel (EulerOS-SA-2021-1386)
  • 147690 - EulerOS Virtualization 2.9.0 : kernel (EulerOS-SA-2021-1642)
  • 147835 - RHEL 7 : kernel (RHSA-2021:0856)
  • 147861 - Oracle Linux 7 : kernel (ELSA-2021-0856)
  • 147871 - SUSE SLES12 Security Update : kernel (SUSE-SU-2021:0870-1)
  • 147885 - CentOS 7 : kernel (CESA-2021:0856)
  • 147905 - F5 Networks BIG-IP : Linux kernel vulnerability (K09604370)
  • 147975 - Ubuntu 16.04 LTS : Linux kernel vulnerabilities (USN-4748-1)
  • 147978 - Ubuntu 20.04 LTS / 20.10 : Linux kernel vulnerabilities (USN-4751-1)
  • 147982 - Ubuntu 20.04 LTS : Linux kernel (OEM) vulnerabilities (USN-4752-1)
  • 147983 - Ubuntu 16.04 LTS / 18.04 LTS : Linux kernel vulnerabilities (USN-4749-1)
  • 148009 - Ubuntu 18.04 LTS / 20.04 LTS : Linux kernel vulnerabilities (USN-4750-1)
  • 148041 - EulerOS 2.0 SP5 : kernel (EulerOS-SA-2021-1684)
  • 148350 - Photon OS 4.0: Linux PHSA-2021-4.0-0007
  • 148369 - RHEL 8 : kernel-rt (RHSA-2021:1081)
  • 148370 - RHEL 8 : kernel (RHSA-2021:1093)
  • 148371 - Oracle Linux 8 : kernel (ELSA-2021-1093)
  • 148386 - SUSE SLES12 Security Update : kernel (SUSE-SU-2021:1074-1)
  • 148422 - CentOS 8 : kernel (CESA-2021:1093)

Version

This page has been produced using Nessus Professional 10.1.2 (#68) LINUX, Plugin set 202205072148.
Plugin file redhat-RHSA-2021-0857.nasl version 1.7. For more plugins, visit the Nessus Plugin Library.

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