Security Updates for Microsoft Office Online Server (July 2023)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##

include('compat.inc');

if (description)
{
  script_id(178244);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/08/11");

  script_cve_id("CVE-2023-33162");
  script_xref(name:"MSKB", value:"5002421");
  script_xref(name:"IAVA", value:"2023-A-0341-S");
  script_xref(name:"IAVA", value:"2023-A-0349-S");

  script_name(english:"Security Updates for Microsoft Office Online Server (July 2023)");

  script_set_attribute(attribute:"synopsis", value:
"The Microsoft Office Web Apps installation on the remote host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"An information disclosure vulnerability exists in Microsoft Office Online Server. An unauthenticated, local attacker
can exploit this to disclose potentially sensitive information.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  # https://support.microsoft.com/en-us/topic/description-of-the-security-update-for-office-online-server-july-11-2023-kb5002421-4e51a171-8a64-4d6b-886e-1cc66191cb32
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?697cd43c");
  script_set_attribute(attribute:"solution", value:
"Microsoft has released KB5002401 to address this issue.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:N/A:N");
  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:N/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2023-33162");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2023/07/11");
  script_set_attribute(attribute:"patch_publication_date", value:"2023/07/11");
  script_set_attribute(attribute:"plugin_publication_date", value:"2023/07/13");

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

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

  script_copyright(english:"This script is Copyright (C) 2023 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('smb_func.inc');
include('smb_hotfixes.inc');
include('smb_hotfixes_fcheck.inc');
include('install_func.inc');

get_kb_item_or_exit('SMB/MS_Bulletin_Checks/Possible');

var path, vuln;

var bulletin = 'MS23-07';
var kbs = make_list('5002421');


if (get_kb_item('Host/patch_management_checks')) 
  hotfix_check_3rd_party(bulletin:bulletin, kbs:kbs, severity:SECURITY_WARNING);

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

var port = kb_smb_transport();

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

if (!empty_or_null(owa_installs))
{
  var owa_install;
  foreach owa_install (owa_installs[1])
  {
    if (owa_install['Product'] == '2016')
    {
      var oos_path = owa_install['path'];
      var oos_sp = owa_install['SP'];
    }
  }
}
vuln = FALSE;

####################################################################
# Office Online Server
####################################################################
if (oos_path && (!isnull(oos_sp) && oos_sp == '0'))
{
  path = hotfix_append_path(path:oos_path, value:'WordConversionService\\bin\\Converter');
  if (hotfix_check_fversion(file:'absblobstore.dll', version:'16.0.10400.20000', min_version:'16.0.10000.0', path:path, kb:'5002421', product:'Office Online Server') == HCF_OLDER)
    vuln = TRUE;
}


if (vuln)
{
  replace_kb_item(name:'SMB/Missing/'+bulletin, value:TRUE);
  hotfix_security_warning();
  hotfix_check_fversion_end();
  exit(0);
}
else
{
  hotfix_check_fversion_end();
  audit(AUDIT_HOST_NOT, 'affected');
}