Microsoft Excel Viewer 2007 Service Pack 3 Remote Code Execution Vulnerability (KB2596760)

# SPDX-FileCopyrightText: 2019 Greenbone AG
# Some text descriptions might be excerpted from (a) referenced
# source(s), and are Copyright (C) by the respective right holder(s).
#
# SPDX-License-Identifier: GPL-2.0-only

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.814598");
  script_version("2025-04-11T05:40:28+0000");
  script_xref(name:"CISA", value:"Known Exploited Vulnerability (KEV) catalog");
  script_xref(name:"URL", value:"https://www.cisa.gov/known-exploited-vulnerabilities-catalog");
  script_cve_id("CVE-2019-0541");
  script_tag(name:"cvss_base", value:"9.3");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:N/C:C/I:C/A:C");
  script_tag(name:"last_modification", value:"2025-04-11 05:40:28 +0000 (Fri, 11 Apr 2025)");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2025-04-10 16:56:24 +0000 (Thu, 10 Apr 2025)");
  script_tag(name:"creation_date", value:"2019-01-09 15:37:10 +0530 (Wed, 09 Jan 2019)");
  script_name("Microsoft Excel Viewer 2007 Service Pack 3 Remote Code Execution Vulnerability (KB2596760)");

  script_tag(name:"summary", value:"This host is missing an important security
  update according to Microsoft KB2596760");

  script_tag(name:"vuldetect", value:"Checks if a vulnerable version is present on the target host.");

  script_tag(name:"insight", value:"The flaw exists in the way that
  the MSHTML engine improperly validates input.");

  script_tag(name:"impact", value:"Successful exploitation will allow an
  attacker could execute arbitrary code in the context of the current user.");

  script_tag(name:"affected", value:"Microsoft Excel Viewer 2007 Service Pack 3.");

  script_tag(name:"solution", value:"The vendor has released updates. Please see the references for more information.");

  script_tag(name:"solution_type", value:"VendorFix");
  script_tag(name:"qod_type", value:"executable_version");
  script_xref(name:"URL", value:"https://support.microsoft.com/en-us/help/2596760");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2019 Greenbone AG");
  script_family("Windows : Microsoft Bulletins");
  script_dependencies("secpod_office_products_version_900032.nasl");
  script_mandatory_keys("SMB/Office/XLView/Version");
  script_require_ports(139, 445);
  exit(0);
}

include("smb_nt.inc");
include("host_details.inc");
include("version_func.inc");
include("secpod_smb_func.inc");

exeVer = get_kb_item("SMB/Office/XLView/Version");
if(!exeVer){
  exit(0);
}

if(!os_arch = get_kb_item("SMB/Windows/Arch")){
  exit(0);
}

if("x86" >< os_arch){
  key_list = make_list("SOFTWARE\Microsoft\Windows\CurrentVersion");
}
else if("x64" >< os_arch){
  key_list =  make_list("SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion",
                        "SOFTWARE\Microsoft\Windows\CurrentVersion");
}

foreach key(key_list)
{
  path = registry_get_sz(key:key, item:"ProgramFilesDir");

  if(!path){
    exit(0);
  }

  offPath = path + "\Microsoft Office\Office12";
  offexeVer = fetch_file_version(sysPath:offPath, file_name:"msohev.dll");
  if(!offexeVer){
    continue;
  }
  if(offexeVer =~ "^12\." && version_is_less(version:offexeVer, test_version:"12.0.6806.5000"))
  {
    report = report_fixed_ver( file_checked:offPath + "\msohev.dll",
                               file_version:offexeVer, vulnerable_range:"12.0 - 12.0.6802.4999");
    security_message(data:report);
    exit(0);
  }
}
exit(99);