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This script is Copyright (C) 2020-2024 and is owned by Tenable, Inc. or an Affiliate thereof.REDHAT-RHSA-2020-3545.NASL
HistoryAug 26, 2020 - 12:00 a.m.

RHEL 7 : kernel-alt (RHSA-2020:3545)

2020-08-2600:00:00
This script is Copyright (C) 2020-2024 and is owned by Tenable, Inc. or an Affiliate thereof.
www.tenable.com
10

7.5 High

AI Score

Confidence

High

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2020:3545 advisory.

  • kernel: Denial Of Service in the __ipmi_bmc_register() function in drivers/char/ipmi/ipmi_msghandler.c (CVE-2019-19046)

  • kernel: Buffer over-read in crypto_authenc_extractkeys() when a payload longer than 4 bytes is not aligned. (CVE-2020-10769)

  • kernel: sync of excessive duration via an XFS v5 image with crafted metadata (CVE-2020-12655)

Note that Nessus has not tested for these issues 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-2020:3545. The text
# itself is copyright (C) Red Hat, Inc.
##

include('compat.inc');

if (description)
{
  script_id(139809);
  script_version("1.9");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/02/07");

  script_cve_id("CVE-2019-19046", "CVE-2020-10769", "CVE-2020-12655");
  script_xref(name:"RHSA", value:"2020:3545");

  script_name(english:"RHEL 7 : kernel-alt (RHSA-2020:3545)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Red Hat host is missing one or more security updates for kernel-alt.");
  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-2020:3545 advisory.

  - kernel: Denial Of Service in the __ipmi_bmc_register() function in drivers/char/ipmi/ipmi_msghandler.c
    (CVE-2019-19046)

  - kernel: Buffer over-read in crypto_authenc_extractkeys() when a payload longer than 4 bytes is not
    aligned. (CVE-2020-10769)

  - kernel: sync of excessive duration via an XFS v5 image with crafted metadata (CVE-2020-12655)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/CVE-2019-19046");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/CVE-2020-10769");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/CVE-2020-12655");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/errata/RHSA-2020:3545");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/1708775");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/1774988");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/1832543");
  script_set_attribute(attribute:"solution", value:
"Update the RHEL kernel-alt package based on the guidance in RHSA-2020:3545.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:N/I:N/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/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-2019-19046");

  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, 400, 401, 835);
  script_set_attribute(attribute:"vendor_severity", value:"Moderate");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/11/18");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/08/25");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/08/26");

  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");
  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-kdump");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-kdump-devel");
  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) 2020-2024 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: '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 && '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-2019-19046', 'CVE-2020-10769', 'CVE-2020-12655');
  if (ksplice_cves_check(cve_list))
  {
    audit(AUDIT_PATCH_INSTALLED, 'KSplice hotfix for RHSA-2020:3545');
  }
  else
  {
    __rpm_report = ksplice_reporting_text();
  }
}

var constraints = [
  {
    'repo_relative_urls': [
      'content/dist/rhel-alt/server/7/7Server/armv8-a/aarch64/debug',
      'content/dist/rhel-alt/server/7/7Server/armv8-a/aarch64/optional/debug',
      'content/dist/rhel-alt/server/7/7Server/armv8-a/aarch64/optional/os',
      'content/dist/rhel-alt/server/7/7Server/armv8-a/aarch64/optional/source/SRPMS',
      'content/dist/rhel-alt/server/7/7Server/armv8-a/aarch64/os',
      'content/dist/rhel-alt/server/7/7Server/armv8-a/aarch64/source/SRPMS',
      'content/dist/rhel-alt/server/7/7Server/power9/ppc64le/debug',
      'content/dist/rhel-alt/server/7/7Server/power9/ppc64le/optional/debug',
      'content/dist/rhel-alt/server/7/7Server/power9/ppc64le/optional/os',
      'content/dist/rhel-alt/server/7/7Server/power9/ppc64le/optional/source/SRPMS',
      'content/dist/rhel-alt/server/7/7Server/power9/ppc64le/os',
      'content/dist/rhel-alt/server/7/7Server/power9/ppc64le/source/SRPMS',
      'content/dist/rhel-alt/server/7/7Server/power9/ppc64le/supplementary/debug',
      'content/dist/rhel-alt/server/7/7Server/power9/ppc64le/supplementary/source/SRPMS',
      'content/dist/rhel-alt/server/7/7Server/system-z-a/s390x/debug',
      'content/dist/rhel-alt/server/7/7Server/system-z-a/s390x/optional/debug',
      'content/dist/rhel-alt/server/7/7Server/system-z-a/s390x/optional/os',
      'content/dist/rhel-alt/server/7/7Server/system-z-a/s390x/optional/source/SRPMS',
      'content/dist/rhel-alt/server/7/7Server/system-z-a/s390x/os',
      'content/dist/rhel-alt/server/7/7Server/system-z-a/s390x/source/SRPMS',
      'content/dist/rhel/power-le/7/7Server/ppc64le/debug',
      'content/dist/rhel/power-le/7/7Server/ppc64le/highavailability/debug',
      'content/dist/rhel/power-le/7/7Server/ppc64le/highavailability/os',
      'content/dist/rhel/power-le/7/7Server/ppc64le/highavailability/source/SRPMS',
      'content/dist/rhel/power-le/7/7Server/ppc64le/optional/debug',
      'content/dist/rhel/power-le/7/7Server/ppc64le/optional/os',
      'content/dist/rhel/power-le/7/7Server/ppc64le/optional/source/SRPMS',
      'content/dist/rhel/power-le/7/7Server/ppc64le/os',
      'content/dist/rhel/power-le/7/7Server/ppc64le/resilientstorage/debug',
      'content/dist/rhel/power-le/7/7Server/ppc64le/resilientstorage/os',
      'content/dist/rhel/power-le/7/7Server/ppc64le/resilientstorage/source/SRPMS',
      'content/dist/rhel/power-le/7/7Server/ppc64le/sap-hana/debug',
      'content/dist/rhel/power-le/7/7Server/ppc64le/sap-hana/os',
      'content/dist/rhel/power-le/7/7Server/ppc64le/sap-hana/source/SRPMS',
      'content/dist/rhel/power-le/7/7Server/ppc64le/sap/debug',
      'content/dist/rhel/power-le/7/7Server/ppc64le/sap/os',
      'content/dist/rhel/power-le/7/7Server/ppc64le/sap/source/SRPMS',
      'content/dist/rhel/power-le/7/7Server/ppc64le/source/SRPMS',
      'content/dist/rhel/power-le/7/7Server/ppc64le/supplementary/debug',
      'content/dist/rhel/power-le/7/7Server/ppc64le/supplementary/os',
      'content/dist/rhel/power-le/7/7Server/ppc64le/supplementary/source/SRPMS',
      'content/dist/rhel/power/7/7Server/ppc64/debug',
      'content/dist/rhel/power/7/7Server/ppc64/optional/debug',
      'content/dist/rhel/power/7/7Server/ppc64/optional/os',
      'content/dist/rhel/power/7/7Server/ppc64/optional/source/SRPMS',
      'content/dist/rhel/power/7/7Server/ppc64/os',
      'content/dist/rhel/power/7/7Server/ppc64/sap/debug',
      'content/dist/rhel/power/7/7Server/ppc64/sap/os',
      'content/dist/rhel/power/7/7Server/ppc64/sap/source/SRPMS',
      'content/dist/rhel/power/7/7Server/ppc64/source/SRPMS',
      'content/dist/rhel/power/7/7Server/ppc64/supplementary/debug',
      'content/dist/rhel/power/7/7Server/ppc64/supplementary/os',
      'content/dist/rhel/power/7/7Server/ppc64/supplementary/source/SRPMS',
      'content/dist/rhel/system-z/7/7Server/s390x/debug',
      'content/dist/rhel/system-z/7/7Server/s390x/highavailability/debug',
      'content/dist/rhel/system-z/7/7Server/s390x/highavailability/os',
      'content/dist/rhel/system-z/7/7Server/s390x/highavailability/source/SRPMS',
      'content/dist/rhel/system-z/7/7Server/s390x/optional/debug',
      'content/dist/rhel/system-z/7/7Server/s390x/optional/os',
      'content/dist/rhel/system-z/7/7Server/s390x/optional/source/SRPMS',
      'content/dist/rhel/system-z/7/7Server/s390x/os',
      'content/dist/rhel/system-z/7/7Server/s390x/resilientstorage/debug',
      'content/dist/rhel/system-z/7/7Server/s390x/resilientstorage/os',
      'content/dist/rhel/system-z/7/7Server/s390x/resilientstorage/source/SRPMS',
      'content/dist/rhel/system-z/7/7Server/s390x/sap/debug',
      'content/dist/rhel/system-z/7/7Server/s390x/sap/os',
      'content/dist/rhel/system-z/7/7Server/s390x/sap/source/SRPMS',
      'content/dist/rhel/system-z/7/7Server/s390x/source/SRPMS',
      'content/dist/rhel/system-z/7/7Server/s390x/supplementary/debug',
      'content/dist/rhel/system-z/7/7Server/s390x/supplementary/os',
      'content/dist/rhel/system-z/7/7Server/s390x/supplementary/source/SRPMS',
      'content/fastrack/rhel/power/7/ppc64/debug',
      'content/fastrack/rhel/power/7/ppc64/optional/debug',
      'content/fastrack/rhel/power/7/ppc64/optional/os',
      'content/fastrack/rhel/power/7/ppc64/optional/source/SRPMS',
      'content/fastrack/rhel/power/7/ppc64/os',
      'content/fastrack/rhel/power/7/ppc64/source/SRPMS',
      'content/fastrack/rhel/system-z/7/s390x/debug',
      'content/fastrack/rhel/system-z/7/s390x/optional/debug',
      'content/fastrack/rhel/system-z/7/s390x/optional/os',
      'content/fastrack/rhel/system-z/7/s390x/optional/source/SRPMS',
      'content/fastrack/rhel/system-z/7/s390x/os',
      'content/fastrack/rhel/system-z/7/s390x/source/SRPMS'
    ],
    'pkgs': [
      {'reference':'kernel-4.14.0-115.29.1.el7a', 'cpu':'aarch64', 'release':'7', 'el_string':'el7a', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-4.14.0-115.29.1.el7a', 'cpu':'ppc64le', 'release':'7', 'el_string':'el7a', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-4.14.0-115.29.1.el7a', 'cpu':'s390x', 'release':'7', 'el_string':'el7a', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-bootwrapper-4.14.0-115.29.1.el7a', 'cpu':'ppc64le', 'release':'7', 'el_string':'el7a', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-debug-4.14.0-115.29.1.el7a', 'cpu':'aarch64', 'release':'7', 'el_string':'el7a', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-debug-4.14.0-115.29.1.el7a', 'cpu':'ppc64le', 'release':'7', 'el_string':'el7a', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-debug-4.14.0-115.29.1.el7a', 'cpu':'s390x', 'release':'7', 'el_string':'el7a', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-debug-devel-4.14.0-115.29.1.el7a', 'cpu':'aarch64', 'release':'7', 'el_string':'el7a', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-debug-devel-4.14.0-115.29.1.el7a', 'cpu':'ppc64le', 'release':'7', 'el_string':'el7a', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-debug-devel-4.14.0-115.29.1.el7a', 'cpu':'s390x', 'release':'7', 'el_string':'el7a', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-devel-4.14.0-115.29.1.el7a', 'cpu':'aarch64', 'release':'7', 'el_string':'el7a', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-devel-4.14.0-115.29.1.el7a', 'cpu':'ppc64le', 'release':'7', 'el_string':'el7a', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-devel-4.14.0-115.29.1.el7a', 'cpu':'s390x', 'release':'7', 'el_string':'el7a', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-headers-4.14.0-115.29.1.el7a', 'cpu':'aarch64', 'release':'7', 'el_string':'el7a', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-headers-4.14.0-115.29.1.el7a', 'cpu':'ppc64le', 'release':'7', 'el_string':'el7a', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-headers-4.14.0-115.29.1.el7a', 'cpu':'s390x', 'release':'7', 'el_string':'el7a', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-kdump-4.14.0-115.29.1.el7a', 'cpu':'s390x', 'release':'7', 'el_string':'el7a', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-kdump-devel-4.14.0-115.29.1.el7a', 'cpu':'s390x', 'release':'7', 'el_string':'el7a', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-tools-4.14.0-115.29.1.el7a', 'cpu':'aarch64', 'release':'7', 'el_string':'el7a', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-tools-4.14.0-115.29.1.el7a', 'cpu':'ppc64le', 'release':'7', 'el_string':'el7a', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-tools-libs-4.14.0-115.29.1.el7a', 'cpu':'aarch64', 'release':'7', 'el_string':'el7a', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-tools-libs-4.14.0-115.29.1.el7a', 'cpu':'ppc64le', 'release':'7', 'el_string':'el7a', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-tools-libs-devel-4.14.0-115.29.1.el7a', 'cpu':'aarch64', 'release':'7', 'el_string':'el7a', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-tools-libs-devel-4.14.0-115.29.1.el7a', 'cpu':'ppc64le', 'release':'7', 'el_string':'el7a', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'perf-4.14.0-115.29.1.el7a', 'cpu':'aarch64', 'release':'7', 'el_string':'el7a', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'perf-4.14.0-115.29.1.el7a', 'cpu':'ppc64le', 'release':'7', 'el_string':'el7a', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'perf-4.14.0-115.29.1.el7a', 'cpu':'s390x', 'release':'7', 'el_string':'el7a', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'python-perf-4.14.0-115.29.1.el7a', 'cpu':'aarch64', 'release':'7', 'el_string':'el7a', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'python-perf-4.14.0-115.29.1.el7a', 'cpu':'ppc64le', 'release':'7', 'el_string':'el7a', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'python-perf-4.14.0-115.29.1.el7a', 'cpu':'s390x', 'release':'7', 'el_string':'el7a', '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;
    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 (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)) flag++;
  }
}

if (flag)
{
  var extra = NULL;
  if (isnull(applicable_repo_urls) || !applicable_repo_urls) extra = rpm_report_get() + redhat_report_repo_caveat();
  else extra = rpm_report_get();
  security_report_v4(
      port       : 0,
      severity   : SECURITY_WARNING,
      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 / kernel-bootwrapper / kernel-debug / kernel-debug-devel / etc');
}
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