Security Updates for Microsoft Office Products (July 2020) (macOS)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from the Microsoft Security Updates API. The text
# itself is copyright (C) Microsoft Corporation.
#

include('compat.inc');

if (description)
{
  script_id(138503);
  script_version("1.5");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/05/12");

  script_cve_id(
    "CVE-2020-1342",
    "CVE-2020-1409",
    "CVE-2020-1445",
    "CVE-2020-1446",
    "CVE-2020-1447"
  );
  script_xref(name:"IAVA", value:"2020-A-0307-S");
  script_xref(name:"IAVA", value:"2020-A-0312-S");

  script_name(english:"Security Updates for Microsoft Office Products (July 2020) (macOS)");

  script_set_attribute(attribute:"synopsis", value:
"An application installed on the remote macOS or Mac OS X host is affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The Microsoft Office application installed on the remote macOS or Mac OS X host is missing a security update. It is,
therefore, affected by multiple vulnerabilities:

  - An information disclosure vulnerability exists when Microsoft Office software reads out of bound memory
    due to an uninitialized variable, which could disclose the contents of memory. An attacker who
    successfully exploited the vulnerability could view out of bound memory. (CVE-2020-1342)
  
  - A remote code execution vulnerability exists in the way that DirectWrite handles objects in memory. An
    attacker who successfully exploited this vulnerability could take control of the affected system. An
    attacker could then install programs; view, change, or delete data; or create new accounts with full user
    rights. (CVE-2020-1409)
  
  - An information disclosure vulnerability exists when Microsoft Office improperly discloses the contents of
    its memory. An attacker who exploited the vulnerability could use the information to compromise the user’s
    computer or data. (CVE-2020-1445)
  
  - A remote code execution vulnerability exists in Microsoft Word software when it fails to properly handle
    objects in memory. An attacker who successfully exploited the vulnerability could use a specially crafted
    file to perform actions in the security context of the current user. For example, the file could then take
    actions on behalf of the logged-on user with the same permissions as the current user. (CVE-2020-1446,
    CVE-2020-1447)");
  # https://docs.microsoft.com/en-us/officeupdates/update-history-office-for-mac
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?43ed1b90");
  # https://docs.microsoft.com/en-us/officeupdates/release-notes-office-for-mac#july-14-2020
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?7e189d9e");
  # https://docs.microsoft.com/en-us/officeupdates/release-notes-office-2016-mac#july-2020-release
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?4dc744c6");
  script_set_attribute(attribute:"solution", value:
"Microsoft has released a set of patches for Microsoft Office for Mac.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:C/I:C/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:N/UI:R/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-2020-1409");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2020-1447");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/07/14");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/07/14");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/07/15");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:apple:mac_os_x");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:office");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:excel");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:word");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:powerpoint");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:onenote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:outlook");
  script_set_attribute(attribute:"stig_severity", value:"II");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"MacOS X Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2020-2022 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("macosx_office_installed.nbin");
  script_require_keys("Host/MacOSX/Version");
  script_require_ports("installed_sw/Microsoft Word", "installed_sw/Microsoft Excel", "installed_sw/Microsoft PowerPoint", "installed_sw/Microsoft OneNote", "installed_sw/Microsoft Outlook");

  exit(0);
}

include('vcf.inc');

os = get_kb_item_or_exit('Host/MacOSX/Version');
apps = make_list(
  'Microsoft Word',
  'Microsoft Excel',
  'Microsoft PowerPoint',
  'Microsoft OneNote',
  'Microsoft Outlook'
);
report = '';

#2016
min_ver_16 = '16';
fix_ver_16 = '16.16.24';
fix_disp_16 = '16.16.24 (20071300)';

#2019
min_ver_19 = '16.17.0';
fix_ver_19 = '16.39';
fix_disp_19 = '16.39 (20071300)';

foreach app (apps)
{
  installs = get_installs(app_name:app);
  if (isnull(installs[1]))
    continue;

  foreach install (installs[1])
  {
    version = install['version'];

    if (ver_compare(ver:version, minver:min_ver_19, fix:fix_ver_19, strict:FALSE) < 0)
    {
      app_label = app + ' for Mac 2019';
      report +=
        '\n\n  Product           : ' + app_label +
        '\n  Installed version : ' + version +
        '\n  Fixed version     : ' + fix_disp_19;
    }
    else if (ver_compare(ver:version, minver:min_ver_16, fix:fix_ver_16, strict:FALSE) < 0)
    {
      app_label = app + ' for Mac 2016';
      report +=
        '\n\n  Product           : ' + app_label +
        '\n  Installed version : ' + version +
        '\n  Fixed version     : ' + fix_disp_16;
    }
  }
}
if (empty(report))
  audit(AUDIT_HOST_NOT, 'affected');

if (os =~ "^Mac OS X 10\.[0-9](\.|$)")
  report += '\n  Note              : Update will require Mac OS X 10.10.0 or later.\n';

security_report_v4(severity:SECURITY_HOLE, port:0, extra:report);