Security Updates for Microsoft Office (July 2019) (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(127124);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/05/08");

  script_cve_id("CVE-2019-1084", "CVE-2019-1110", "CVE-2019-1111");
  script_bugtraq_id(108929, 108967, 108974);

  script_name(english:"Security Updates for Microsoft Office (July 2019) (macOS)");

  script_set_attribute(attribute:"synopsis", value:
"An application installed on the remote macOS or Mac OS X host is affected by remote code execution 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 Exchange allows creation of entities with Display Names having
  non-printable characters. An authenticated attacker could exploit this vulnerability by creating entities with
  invalid display names, which, when added to conversations, remain invisible. This security update addresses the
  issue by validating display names upon creation in Microsoft Exchange, and by rendering invalid display names
  correctly in Microsoft Outlook clients. (CVE-2019-1084)

  - A remote code execution vulnerability exists in Microsoft Excel software when the software fails to properly
   handle objects in memory. An attacker who successfully exploited the vulnerability could run arbitrary code in
  the context of the current user. If the current user is logged on with administrative user rights, an attacker
  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. Users whose accounts are configured to have fewer user rights on
  the system could be less impacted than users who operate with administrative user rights. Exploitation of the
  vulnerability requires that a user open a specially crafted file with an affected version of Microsoft Excel.
  In an email attack scenario, an attacker could exploit the vulnerability by sending the specially crafted file
  to the user and convincing the user to open the file. In a web-based attack scenario, an attacker could host a
  website (or leverage a compromised website that accepts or hosts user-provided content) containing a specially
  crafted file designed to exploit the vulnerability. An attacker would have no way to force users to visit the
  website. Instead, an attacker would have to convince users to click a link, typically by way of an enticement
  in an email or instant message, and then convince them to open the specially crafted file. The security update
  addresses the vulnerability by correcting how Microsoft Excel handles objects in memory.
  (CVE-2019-1110, CVE-2019-1111)");
  # https://docs.microsoft.com/en-us/officeupdates/release-notes-office-2016-mac#july-16-2019
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?312464d3");
  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-2019-1111");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/07/09");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/07/16");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/08/05");

  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:outlook");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2019-2024 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 Excel", "installed_sw/Microsoft Outlook");

  exit(0);
}

include('audit.inc');
include('global_settings.inc');
include('misc_func.inc');
include('install_func.inc');
include('vcf.inc');

os = get_kb_item_or_exit('Host/MacOSX/Version');

apps = make_list('Microsoft Excel', 'Microsoft Outlook');

report = '';

#2016
min_ver_16 = '16';
fix_ver_16 = '16.16.12';
fix_disp_16 = '16.16.12 (19071500)';

#2019
min_ver_19 = '16.17.0';
fix_ver_19 = '16.27';
fix_disp_19 = '16.27 (19071500)';

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);