Security Update for Microsoft Office (April 2018) (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(109016);
  script_version("1.3");
  script_cvs_date("Date: 2019/11/08");

  script_cve_id("CVE-2018-1029");

  script_name(english:"Security Update for Microsoft Office (April 2018) (macOS)");
  script_summary(english:"Checks the version of Microsoft Office.");

  script_set_attribute(attribute:"synopsis", value:
"An application installed on the remote macOS or Mac OS X host is
affected by a remote code execution vulnerability.");
  script_set_attribute(attribute:"description", value:
"The Microsoft Office 2016 application installed on the remote macOS
or Mac OS X host is missing a security update. It is, therefore,
affected by a remote code execution vulnerability 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. The security update
addresses the vulnerability by correcting how Microsoft Excel handles
objects in memory.");
  # https://support.office.com/en-us/article/release-notes-for-office-2016-for-mac-ed2da564-6d53-4542-9954-7e3209681a41?ui=en-US&rs=en-US&ad=US
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?f07d9218");
  # https://portal.msrc.microsoft.com/en-us/security-guidance/advisory/CVE-2018-1029
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?6c1e305a");
  script_set_attribute(attribute:"solution", value:
"Microsoft has released a set of patches for Microsoft Office 2016 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:L/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-2018-1029");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2018/04/10");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/04/10");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/04/12");

  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_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2018-2019 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/Office for Mac 2016 ", "installed_sw/Microsoft Excel");

  exit(0);
}

include("audit.inc");
include("global_settings.inc");
include("misc_func.inc");
include("install_func.inc");

os = get_kb_item("Host/MacOSX/Version");
if (!os) audit(AUDIT_OS_NOT, "Mac OS X");

apps = make_list(
  "Office for Mac 2016",
  "Microsoft Excel"
);

report = "";

foreach app (apps)
{
  installs = get_installs(app_name:app);
  if (isnull(installs[1])) continue;
  foreach install (installs[1])
  {
    version = install['version'];
    app_label = app;
    fix = NULL;
    fix_disp = NULL;

    if (version =~ "^16\.")
    {
      app_label += " for Mac 2016";
      fix = '16.12.0';
      fix_disp = '16.12 (18041000)';
    }

    if (fix && ver_compare(ver:version, fix:fix, strict:FALSE) < 0)
    {
      report +=
        '\n  Product           : ' + app_label +
        '\n  Installed version : ' + version +
        '\n  Fixed version     : ' + fix_disp;

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

# Report findings.
if (!empty(report))
  security_report_v4(severity:SECURITY_HOLE, port:0, extra:report);
else
  audit(AUDIT_HOST_NOT, "affected");