Security Updates for Microsoft Office Web Apps (January 2019)

#
# (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(121026);
  script_version("1.2");
  script_cvs_date("Date: 2019/10/31 15:18:52");

  script_cve_id("CVE-2019-0561", "CVE-2019-0585");
  script_xref(name:"MSKB", value:"4461620");
  script_xref(name:"MSKB", value:"4461633");
  script_xref(name:"MSFT", value:"MS19-4461620");
  script_xref(name:"MSFT", value:"MS19-4461633");

  script_name(english:"Security Updates for Microsoft Office Web Apps (January 2019)");
  script_summary(english:"Checks for Microsoft security updates.");

  script_set_attribute(attribute:"synopsis", value:
"The Microsoft Office Web Apps installation on the remote host is affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The Microsoft Office Web Apps installation on the remote
host is missing security updates. It is, therefore, affected
by multiple vulnerabilities :

  - 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-2019-0585)

  - An information disclosure vulnerability exists when
    Microsoft Word macro buttons are used improperly. An
    attacker who successfully exploited this vulnerability
    could read arbitrary files from a targeted system.
    (CVE-2019-0561)");
  # https://support.microsoft.com/en-us/help/4461620/description-of-the-security-update-for-sharepoint-server-2010-office
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?10cef958");
  # https://support.microsoft.com/en-us/help/4461633/description-of-the-security-update-for-office-online-server-january
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?e9b52ea3");
  script_set_attribute(attribute:"solution", value:
"Microsoft has released the following security updates to address this issue:  
  -KB4461620
  -KB4461633");
  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-2019-0585");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/01/08");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/01/08");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/01/08");

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

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

  script_copyright(english:"This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("office_installed.nasl", "microsoft_owa_installed.nbin", "microsoft_office_compatibility_pack_installed.nbin", "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");

get_kb_item_or_exit("SMB/MS_Bulletin_Checks/Possible");

bulletin = "MS19-01";
kbs = make_list(
  "4461620",
  "4461633"
);
if (get_kb_item("Host/patch_management_checks")) hotfix_check_3rd_party(bulletin:bulletin, kbs:kbs, severity:SECURITY_HOLE);

get_kb_item_or_exit("SMB/Registry/Enumerated", exit_code:1);

port = kb_smb_transport();

# Get installs of Office Web Apps
owa_installs = get_installs(app_name:"Microsoft Office Web Apps");

if (!empty_or_null(owa_installs))
{
  foreach owa_install (owa_installs[1])
  {
    if (owa_install["Product"] == "2010")
    {
      owa_2010_path = owa_install['path'];
      owa_2010_sp = owa_install['SP'];
    }
    else if (owa_install["Product"] == "2019")
    {
      owa_2019_path = owa_install["path"];
      owa_2019_sp = owa_install["SP"];
    }
  }
}
vuln = FALSE;

####################################################################
# Office Web Apps 2010 SP2
####################################################################
if (owa_2010_path && (!isnull(owa_2010_sp) && owa_2010_sp == "2"))
{
  path = hotfix_append_path(path:owa_2010_path, value:"14.0\WebServices\ConversionService\Bin\Converter");
  if (hotfix_check_fversion(file:"msoserver.dll", version:"14.0.7227.5000", min_version:"14.0.0.0", path:path, kb:"4461620", product:"Office Web Apps 2010") == HCF_OLDER)
    vuln = TRUE;
}

####################################################################
# Office Web Apps 2019
####################################################################
#if (owa_2019_path && (!isnull(owa_2019_sp) && owa_2019_sp == "0"))
#{
#  path = hotfix_append_path(path:owa_2019_path, value:"");
#  if (hotfix_check_fversion(file:"msoserver.dll", version:"16.0.10340.20006", min_version:"16.0.0.0", path:path, kb:"4461633", product:"Office Web Apps 2019") == 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');
}