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nessusThis script is Copyright (C) 2022-2024 and is owned by Tenable, Inc. or an Affiliate thereof.REDHAT-RHSA-2022-6073.NASL
HistoryAug 16, 2022 - 12:00 a.m.

RHEL 7 : kernel (RHSA-2022:6073)

2022-08-1600:00:00
This script is Copyright (C) 2022-2024 and is owned by Tenable, Inc. or an Affiliate thereof.
www.tenable.com
19

7.8 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

8.4 High

AI Score

Confidence

High

7.2 High

CVSS2

Access Vector

Access Complexity

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:L/AC:L/Au:N/C:C/I:C/A:C

0.001 Low

EPSS

Percentile

50.7%

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2022:6073 advisory.

  • kernel: a use-after-free write in the netfilter subsystem can lead to privilege escalation to root (CVE-2022-32250)

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

##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Red Hat Security Advisory RHSA-2022:6073. The text
# itself is copyright (C) Red Hat, Inc.
##

include('compat.inc');

if (description)
{
  script_id(164151);
  script_version("1.9");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/04/28");

  script_cve_id("CVE-2022-32250");
  script_xref(name:"RHSA", value:"2022:6073");

  script_name(english:"RHEL 7 : kernel (RHSA-2022:6073)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Red Hat host is missing a security update for kernel.");
  script_set_attribute(attribute:"description", value:
"The remote Redhat Enterprise Linux 7 host has packages installed that are affected by a vulnerability as referenced in
the RHSA-2022:6073 advisory.

  - kernel: a use-after-free write in the netfilter subsystem can lead to privilege escalation to root
    (CVE-2022-32250)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  # https://access.redhat.com/security/data/csaf/v2/advisories/2022/rhsa-2022_6073.json
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?fa5d32c7");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/updates/classification/#important");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/errata/RHSA-2022:6073");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2092427");
  script_set_attribute(attribute:"solution", value:
"Update the RHEL kernel package based on the guidance in RHSA-2022:6073.");
  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:H/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:H/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2022-32250");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"exploited_by_malware", value:"true");
  script_cwe_id(416);
  script_set_attribute(attribute:"vendor_severity", value:"Important");

  script_set_attribute(attribute:"vuln_publication_date", value:"2022/06/02");
  script_set_attribute(attribute:"patch_publication_date", value:"2022/08/16");
  script_set_attribute(attribute:"plugin_publication_date", value:"2022/08/16");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:rhel_aus:7.7");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:rhel_e4s:7.7");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:rhel_tus:7.7");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:bpftool");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-bootwrapper");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-debug");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-debug-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-headers");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-tools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-tools-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-tools-libs-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:perf");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:python-perf");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2022-2024 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('rpm.inc');
include('rhel.inc');
include('ksplice.inc');

if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_release = get_kb_item('Host/RedHat/release');
if (isnull(os_release) || 'Red Hat' >!< os_release) audit(AUDIT_OS_NOT, 'Red Hat');
var os_ver = pregmatch(pattern: "Red Hat Enterprise Linux.*release ([0-9]+(\.[0-9]+)?)", string:os_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'Red Hat');
os_ver = os_ver[1];
if (!rhel_check_release(operator: 'eq', os_version: os_ver, rhel_version: '7.7')) audit(AUDIT_OS_NOT, 'Red Hat 7.7', '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 && 'ppc' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Red Hat', cpu);

if (get_one_kb_item('Host/ksplice/kernel-cves'))
{
  rm_kb_item(name:'Host/uptrack-uname-r');
  var cve_list = make_list('CVE-2022-32250');
  if (ksplice_cves_check(cve_list))
  {
    audit(AUDIT_PATCH_INSTALLED, 'KSplice hotfix for RHSA-2022:6073');
  }
  else
  {
    __rpm_report = ksplice_reporting_text();
  }
}

var constraints = [
  {
    'repo_relative_urls': [
      'content/aus/rhel/server/7/7.7/x86_64/debug',
      'content/aus/rhel/server/7/7.7/x86_64/optional/debug',
      'content/aus/rhel/server/7/7.7/x86_64/optional/os',
      'content/aus/rhel/server/7/7.7/x86_64/optional/source/SRPMS',
      'content/aus/rhel/server/7/7.7/x86_64/os',
      'content/aus/rhel/server/7/7.7/x86_64/source/SRPMS',
      'content/e4s/rhel/power-le/7/7.7/ppc64le/debug',
      'content/e4s/rhel/power-le/7/7.7/ppc64le/highavailability/debug',
      'content/e4s/rhel/power-le/7/7.7/ppc64le/highavailability/os',
      'content/e4s/rhel/power-le/7/7.7/ppc64le/highavailability/source/SRPMS',
      'content/e4s/rhel/power-le/7/7.7/ppc64le/optional/debug',
      'content/e4s/rhel/power-le/7/7.7/ppc64le/optional/os',
      'content/e4s/rhel/power-le/7/7.7/ppc64le/optional/source/SRPMS',
      'content/e4s/rhel/power-le/7/7.7/ppc64le/os',
      'content/e4s/rhel/power-le/7/7.7/ppc64le/source/SRPMS',
      'content/e4s/rhel/server/7/7.7/x86_64/debug',
      'content/e4s/rhel/server/7/7.7/x86_64/highavailability/debug',
      'content/e4s/rhel/server/7/7.7/x86_64/highavailability/os',
      'content/e4s/rhel/server/7/7.7/x86_64/highavailability/source/SRPMS',
      'content/e4s/rhel/server/7/7.7/x86_64/optional/debug',
      'content/e4s/rhel/server/7/7.7/x86_64/optional/os',
      'content/e4s/rhel/server/7/7.7/x86_64/optional/source/SRPMS',
      'content/e4s/rhel/server/7/7.7/x86_64/os',
      'content/e4s/rhel/server/7/7.7/x86_64/source/SRPMS',
      'content/tus/rhel/server/7/7.7/x86_64/debug',
      'content/tus/rhel/server/7/7.7/x86_64/highavailability/debug',
      'content/tus/rhel/server/7/7.7/x86_64/highavailability/os',
      'content/tus/rhel/server/7/7.7/x86_64/highavailability/source/SRPMS',
      'content/tus/rhel/server/7/7.7/x86_64/optional/debug',
      'content/tus/rhel/server/7/7.7/x86_64/optional/os',
      'content/tus/rhel/server/7/7.7/x86_64/optional/source/SRPMS',
      'content/tus/rhel/server/7/7.7/x86_64/os',
      'content/tus/rhel/server/7/7.7/x86_64/source/SRPMS'
    ],
    'pkgs': [
      {'reference':'bpftool-3.10.0-1062.68.1.el7', 'sp':'7', 'cpu':'ppc64le', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'bpftool-3.10.0-1062.68.1.el7', 'sp':'7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-3.10.0-1062.68.1.el7', 'sp':'7', 'cpu':'ppc64le', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-3.10.0-1062.68.1.el7', 'sp':'7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-debug-3.10.0-1062.68.1.el7', 'sp':'7', 'cpu':'ppc64le', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-debug-3.10.0-1062.68.1.el7', 'sp':'7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-debug-devel-3.10.0-1062.68.1.el7', 'sp':'7', 'cpu':'ppc64le', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-debug-devel-3.10.0-1062.68.1.el7', 'sp':'7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-devel-3.10.0-1062.68.1.el7', 'sp':'7', 'cpu':'ppc64le', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-devel-3.10.0-1062.68.1.el7', 'sp':'7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-headers-3.10.0-1062.68.1.el7', 'sp':'7', 'cpu':'ppc64le', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-headers-3.10.0-1062.68.1.el7', 'sp':'7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-tools-3.10.0-1062.68.1.el7', 'sp':'7', 'cpu':'ppc64le', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-tools-3.10.0-1062.68.1.el7', 'sp':'7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-tools-libs-3.10.0-1062.68.1.el7', 'sp':'7', 'cpu':'ppc64le', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-tools-libs-3.10.0-1062.68.1.el7', 'sp':'7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-tools-libs-devel-3.10.0-1062.68.1.el7', 'sp':'7', 'cpu':'ppc64le', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-tools-libs-devel-3.10.0-1062.68.1.el7', 'sp':'7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'perf-3.10.0-1062.68.1.el7', 'sp':'7', 'cpu':'ppc64le', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'perf-3.10.0-1062.68.1.el7', 'sp':'7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'python-perf-3.10.0-1062.68.1.el7', 'sp':'7', 'cpu':'ppc64le', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'python-perf-3.10.0-1062.68.1.el7', 'sp':'7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE}
    ]
  },
  {
    'repo_relative_urls': [
      'content/aus/rhel/server/7/7.7/x86_64/debug',
      'content/aus/rhel/server/7/7.7/x86_64/optional/debug',
      'content/aus/rhel/server/7/7.7/x86_64/optional/os',
      'content/aus/rhel/server/7/7.7/x86_64/optional/source/SRPMS',
      'content/aus/rhel/server/7/7.7/x86_64/os',
      'content/aus/rhel/server/7/7.7/x86_64/source/SRPMS',
      'content/e4s/rhel/power-le/7/7.7/ppc64le/debug',
      'content/e4s/rhel/power-le/7/7.7/ppc64le/highavailability/debug',
      'content/e4s/rhel/power-le/7/7.7/ppc64le/highavailability/os',
      'content/e4s/rhel/power-le/7/7.7/ppc64le/highavailability/source/SRPMS',
      'content/e4s/rhel/power-le/7/7.7/ppc64le/optional/debug',
      'content/e4s/rhel/power-le/7/7.7/ppc64le/optional/os',
      'content/e4s/rhel/power-le/7/7.7/ppc64le/optional/source/SRPMS',
      'content/e4s/rhel/power-le/7/7.7/ppc64le/os',
      'content/e4s/rhel/power-le/7/7.7/ppc64le/source/SRPMS',
      'content/e4s/rhel/server/7/7.7/x86_64/debug',
      'content/e4s/rhel/server/7/7.7/x86_64/highavailability/debug',
      'content/e4s/rhel/server/7/7.7/x86_64/highavailability/os',
      'content/e4s/rhel/server/7/7.7/x86_64/highavailability/source/SRPMS',
      'content/e4s/rhel/server/7/7.7/x86_64/optional/debug',
      'content/e4s/rhel/server/7/7.7/x86_64/optional/os',
      'content/e4s/rhel/server/7/7.7/x86_64/optional/source/SRPMS',
      'content/e4s/rhel/server/7/7.7/x86_64/os',
      'content/e4s/rhel/server/7/7.7/x86_64/source/SRPMS',
      'content/tus/rhel/server/7/7.7/x86_64/debug',
      'content/tus/rhel/server/7/7.7/x86_64/optional/debug',
      'content/tus/rhel/server/7/7.7/x86_64/optional/os',
      'content/tus/rhel/server/7/7.7/x86_64/optional/source/SRPMS',
      'content/tus/rhel/server/7/7.7/x86_64/os',
      'content/tus/rhel/server/7/7.7/x86_64/source/SRPMS'
    ],
    'pkgs': [
      {'reference':'kernel-bootwrapper-3.10.0-1062.68.1.el7', 'sp':'7', 'cpu':'ppc64le', 'release':'7', 'rpm_spec_vers_cmp':TRUE}
    ]
  }
];

var applicable_repo_urls = rhel_determine_applicable_repository_urls(constraints:constraints);
if(applicable_repo_urls == RHEL_REPOS_NO_OVERLAP_MESSAGE) exit(0, RHEL_REPO_NOT_ENABLED);

var flag = 0;
foreach var constraint_array ( constraints ) {
  var repo_relative_urls = NULL;
  if (!empty_or_null(constraint_array['repo_relative_urls'])) repo_relative_urls = constraint_array['repo_relative_urls'];
  foreach var pkg ( constraint_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 cves = NULL;
    if (!empty_or_null(pkg['reference'])) reference = pkg['reference'];
    if (!empty_or_null(pkg['release'])) _release = 'RHEL' + pkg['release'];
    if (!empty_or_null(pkg['sp'])) sp = pkg['sp'];
    if (!empty_or_null(pkg['cpu'])) _cpu = pkg['cpu'];
    if (!empty_or_null(pkg['el_string'])) el_string = pkg['el_string'];
    if (!empty_or_null(pkg['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = pkg['rpm_spec_vers_cmp'];
    if (!empty_or_null(pkg['epoch'])) epoch = pkg['epoch'];
    if (!empty_or_null(pkg['allowmaj'])) allowmaj = pkg['allowmaj'];
    if (!empty_or_null(pkg['exists_check'])) exists_check = pkg['exists_check'];
    if (!empty_or_null(pkg['cves'])) cves = pkg['cves'];
    if (reference &&
        _release &&
        rhel_decide_repo_relative_url_check(required_repo_url_list:repo_relative_urls) &&
        (applicable_repo_urls || (!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, cves:cves)) flag++;
  }
}

if (flag)
{
  var subscription_caveat = '\n' +
    'NOTE: This vulnerability check contains fixes that apply to\n' +
    'packages only available in the Red Hat Enterprise Linux\n' +
    'Advanced Update Support, Telco Extended Update Support or Update Services for SAP Solutions repositories.\n' +
    'Access to these repositories requires a paid RHEL subscription.\n';
  var extra = NULL;
  if (isnull(applicable_repo_urls) || !applicable_repo_urls) extra = subscription_caveat + rpm_report_get() + redhat_report_repo_caveat();
  else extra = subscription_caveat + rpm_report_get();
  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, 'bpftool / kernel / kernel-bootwrapper / kernel-debug / etc');
}
VendorProductVersionCPE
redhatrhel_aus7.7cpe:/o:redhat:rhel_aus:7.7
redhatrhel_e4s7.7cpe:/o:redhat:rhel_e4s:7.7
redhatrhel_tus7.7cpe:/o:redhat:rhel_tus:7.7
redhatenterprise_linuxbpftoolp-cpe:/a:redhat:enterprise_linux:bpftool
redhatenterprise_linuxkernelp-cpe:/a:redhat:enterprise_linux:kernel
redhatenterprise_linuxkernel-bootwrapperp-cpe:/a:redhat:enterprise_linux:kernel-bootwrapper
redhatenterprise_linuxkernel-debugp-cpe:/a:redhat:enterprise_linux:kernel-debug
redhatenterprise_linuxkernel-debug-develp-cpe:/a:redhat:enterprise_linux:kernel-debug-devel
redhatenterprise_linuxkernel-develp-cpe:/a:redhat:enterprise_linux:kernel-devel
redhatenterprise_linuxkernel-headersp-cpe:/a:redhat:enterprise_linux:kernel-headers
Rows per page:
1-10 of 151

7.8 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

8.4 High

AI Score

Confidence

High

7.2 High

CVSS2

Access Vector

Access Complexity

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:L/AC:L/Au:N/C:C/I:C/A:C

0.001 Low

EPSS

Percentile

50.7%