Microsoft ASP.NET Core Elevation Of Privilege Vulnerability

# SPDX-FileCopyrightText: 2017 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("1.3.6.1.4.1.25623.1.0.812098");
  script_version("2025-01-21T05:37:33+0000");
  script_cve_id("CVE-2017-11879");
  script_tag(name:"cvss_base", value:"4.3");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:N/C:P/I:N/A:N");
  script_tag(name:"last_modification", value:"2025-01-21 05:37:33 +0000 (Tue, 21 Jan 2025)");
  script_tag(name:"severity_vector", value:"CVSS:3.0/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:"2018-02-01 17:06:00 +0000 (Thu, 01 Feb 2018)");
  script_tag(name:"creation_date", value:"2017-11-20 14:14:33 +0530 (Mon, 20 Nov 2017)");
  script_name("Microsoft ASP.NET Core Elevation Of Privilege Vulnerability");

  script_xref(name:"URL", value:"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-11879");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/101713");
  script_xref(name:"URL", value:"https://github.com/aspnet/announcements/issues/277");

  script_tag(name:"summary", value:"This host is missing an important security
  update according to Microsoft advisory (CVE-2017-11879).");

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

  script_tag(name:"insight", value:"The flaw exists due to an open redirect
  vulnerability in ASP.NET Core.");

  script_tag(name:"impact", value:"Successful exploitation will allow remote
  attackers to gain elevated privileges on affected system.");

  script_tag(name:"affected", value:"Microsoft ASP.NET Core 2.0 using packages 'Microsoft.AspNetCore.All' or 'Microsoft.AspNetCore.Mvc.Core' version 2.0.0.");

  script_tag(name:"solution", value:"Upgrade Microsoft ASP.NET Core 2.0 to use
  package 'Microsoft.AspNetCore.All' version 2.0.3 and package
  'Microsoft.AspNetCore.Mvc.Core' version 2.0.1 or latest. Please see the references
  for more info.");

  script_tag(name:"qod_type", value:"executable_version");
  script_tag(name:"solution_type", value:"VendorFix");

  script_copyright("Copyright (C) 2017 Greenbone AG");
  script_category(ACT_GATHER_INFO);
  script_family("Windows");
  script_dependencies("smb_reg_service_pack.nasl", "gb_wmi_access.nasl", "lsc_options.nasl");
  script_mandatory_keys("WMI/access_successful", "SMB/WindowsVersion");
  script_exclude_keys("win/lsc/disable_wmi_search");

  exit(0);
}

include("smb_nt.inc");
include("version_func.inc");
include("wmi_file.inc");
include("list_array_func.inc");

infos = kb_smb_wmi_connectinfo();
if( ! infos ) exit( 0 );

handle = wmi_connect( host:infos["host"], username:infos["username_wmi_smb"], password:infos["password"] );
if( ! handle ) exit( 0 );

# TODO: Limit to a possible known common path
fileList1 = wmi_file_fileversion( handle:handle, fileName:"Microsoft.AspNetCore.All", fileExtn:"dll", includeHeader:FALSE );
fileList2 = wmi_file_fileversion( handle:handle, fileName:"Microsoft.AspNetCore.Mvc.Core", fileExtn:"dll", includeHeader:FALSE );
wmi_close( wmi_handle:handle );
if( ! fileList1 && ! fileList2 ) {
  exit( 0 );
}

report = "";

if( fileList1 && is_array( fileList1 ) ) {

  foreach filePath1( keys( fileList1 ) ) {

    vers1 = fileList1[filePath1];

    if( vers1 && version1 = eregmatch( string:vers1, pattern:"^([0-9.]+)" ) ) {

      if( version1[1] =~ "^2\.0\.0" ) {
        VULN = TRUE;
        report += report_fixed_ver( file_version:version1[1], file_checked:filePath1, fixed_version:"2.0.3" ) + '\n';
      }
    }
  }
}

if( fileList2 && is_array( fileList2 ) ) {

  foreach filePath2( keys( fileList2 ) ) {

    vers2 = fileList2[filePath2];

    if( vers2 && version2 = eregmatch( string:vers2, pattern:"^([0-9.]+)" ) ) {

      if( version2[1] =~ "^2\.0\.0" ) {
        VULN = TRUE;
        report += report_fixed_ver( file_version:version2[1], file_checked:filePath2, fixed_version:"2.0.1" ) + '\n';
      }
    }
  }
}

if( VULN ) {
  security_message( port:0, data:report );
  exit( 0 );
}

exit( 99 );