Vulnerabilities > CVE-2020-0759 - Unspecified vulnerability in Microsoft Excel and Office 365 Proplus

#
# (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(133650);
  script_version("1.5");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/03/13");

  script_cve_id("CVE-2020-0759");

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

  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 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 due to Microsoft Excel improperly handling objects in 
memory. An attacker who successfully exploited the vulnerability could run arbitrary code in the context of the current
user. To exploit the vulnerability, an attacker has to entice the logged on user to click a link or open a specially 
crafted file to gain control of the system with the privileges of the logged on user.");
  # 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-2016-mac
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?dae26676");
  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-2020-0759");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/01/14");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/01/14");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/02/12");

  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_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: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) 2020 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('audit.inc');
include('global_settings.inc');
include('misc_func.inc');
include('install_func.inc');

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

#2016
min_ver_16 = '16';
fix_ver_16 = '16.16.19';
fix_disp_16 = '16.16.19 (20021000)';

#2019
min_ver_19 = '16.17.0';
fix_ver_19 = '16.34';
fix_disp_19 = '16.34 (20020900)';

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);

#
# (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(133716);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/02/14");

  script_cve_id("CVE-2020-0696", "CVE-2020-0697", "CVE-2020-0759");

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

  script_set_attribute(attribute:"synopsis", value:
"The Microsoft Office Products are affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The Microsoft Office Products are missing security updates. It is, therefore, affected by multiple vulnerabilities:

  - 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. (CVE-2020-0759)

  - A security feature bypass vulnerability exists in Microsoft Outlook software when it improperly handles
    the parsing of URI formats. The security feature bypass by itself does not allow arbitrary code execution.
    However, to successfully exploit the vulnerability, an attacker would have to use it in conjunction with
    another vulnerability, such as a remote code execution vulnerability, to take advantage of the security
    feature bypass vulnerability and run arbitrary code. (CVE-2020-0696)

  - An elevation of privilege vulnerability exists in Microsoft Office OLicenseHeartbeat task, where an
    attacker who successfully exploited this vulnerability could run this task as SYSTEM. (CVE-2020-0697)");
  # https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0696
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?3c75b3fb");
  # https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0697
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?097c5011");
  # https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0759
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?002d43eb");
  script_set_attribute(attribute:"solution", value:
"Microsoft has released a security update to address this issue.

For Office 365, Office 2016 C2R, or Office 2019, ensure automatic updates are enabled or open any office app and 
manually perform an update.");
  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-2020-0759");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/02/11");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/02/11");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/02/14");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:office");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Windows : Microsoft Bulletins");

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

  script_dependencies("office_installed.nasl", "smb_hotfixes.nasl", "ms_bulletin_checks_possible.nasl");
  script_require_keys("SMB/MS_Bulletin_Checks/Possible");
  script_require_ports(139, 445, "Host/patch_management_checks");

  exit(0);
}

include('audit.inc');
include('smb_func.inc');
include('smb_hotfixes.inc');
include('smb_hotfixes_fcheck.inc');
include('smb_reg_query.inc');
include('misc_func.inc');
include('install_func.inc');

bulletin = 'MS20-02';
get_kb_item_or_exit('SMB/MS_Bulletin_Checks/Possible');
get_kb_item_or_exit('SMB/Registry/Enumerated', exit_code:1);

vuln = FALSE;
port = kb_smb_transport();
office_vers = hotfix_check_office_version();

# Office 2016 / 2019 / C2R
if (office_vers['16.0'])
{
  office_sp = get_kb_item('SMB/Office/2016/SP');
  if (!isnull(office_sp) && office_sp == 0)
  {
    path = hotfix_get_officeprogramfilesdir(officever:'16.0');
    prod = 'Microsoft Office 2016';
    prod2019 = 'Microsoft Office 2019';
    mso_dll_path = hotfix_append_path(path:path, value:'Microsoft Office\\root\\Office16');
    c2r_path = mso_dll_path;
    if (
      hotfix_check_fversion(file:'graph.exe', version:'16.0.10730.20438', channel:'Deferred', channel_product:'Office', path:c2r_path, bulletin:bulletin, product:prod) == HCF_OLDER ||
      hotfix_check_fversion(file:'graph.exe', version:'16.0.11328.20526', channel:'Deferred', channel_version:'1902', channel_product:'Office', path:c2r_path, bulletin:bulletin, product:prod) == HCF_OLDER ||
      hotfix_check_fversion(file:'graph.exe', version:'16.0.11929.20606', channel:'First Release for Deferred', channel_product:'Office', path:c2r_path, bulletin:bulletin, product:prod) == HCF_OLDER ||
      hotfix_check_fversion(file:'graph.exe', version:'16.0.12430.20264', channel:'Current', channel_product:'Office', path:c2r_path, bulletin:bulletin, product:prod) == HCF_OLDER ||
      # 2019
      hotfix_check_fversion(file:'graph.exe', version:'16.0.12430.20264', channel:'2019 Retail', channel_product:'Office', path:c2r_path, bulletin:bulletin, product:prod2019) == HCF_OLDER ||
      hotfix_check_fversion(file:'graph.exe', version:'16.0.10356.20006', channel:'2019 Volume', channel_product:'Office', path:c2r_path, bulletin:bulletin, product:prod2019) == HCF_OLDER
    )
    vuln = TRUE;
  }
}
if (vuln)
{
  replace_kb_item(name:'SMB/Missing/'+bulletin, value:TRUE);
  hotfix_security_hole();
  hotfix_check_fversion_end();
  exit(0);
}
else
{
  hotfix_check_fversion_end();
  audit(AUDIT_HOST_NOT, 'affected');
}