Vulnerabilities > CVE-2020-0696 - Unspecified vulnerability in Microsoft Office, Office 365 Proplus and Outlook

#
# (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');
}