Microsoft .NET Framework Multiple Vulnerabilities (KB5029653)

# SPDX-FileCopyrightText: 2023 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("1.3.6.1.4.1.25623.1.0.832247");
  script_version("2023-10-13T05:06:10+0000");
  script_cve_id("CVE-2023-36899", "CVE-2023-36873");
  script_tag(name:"cvss_base", value:"9.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:S/C:C/I:C/A:C");
  script_tag(name:"last_modification", value:"2023-10-13 05:06:10 +0000 (Fri, 13 Oct 2023)");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2023-08-11 17:56:00 +0000 (Fri, 11 Aug 2023)");
  script_tag(name:"creation_date", value:"2023-08-10 11:13:25 +0530 (Thu, 10 Aug 2023)");
  script_name("Microsoft .NET Framework Multiple Vulnerabilities (KB5029653)");

  script_tag(name:"summary", value:"This host is missing an important security
  update according to Microsoft KB5029653");

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

  script_tag(name:"insight", value:"Multiple flaws exist due to,

  - ASP.NET Elevation of Privilege Vulnerability.

  - .NET Framework Spoofing Vulnerability.

  For more information about the vulnerabilities refer to Reference links.");

  script_tag(name:"impact", value:"Successful exploitation will allow an attacker
  to conduct privilege escalation or spoofing on an affected system.");

  script_tag(name:"affected", value:"Microsoft .NET Framework 3.5, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8 for Microsoft Windows Server 2012 R2.");

  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/5029653");

  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2023 Greenbone AG");
  script_family("Windows : Microsoft Bulletins");
  script_dependencies("smb_reg_service_pack.nasl");
  script_require_ports(139, 445);
  script_mandatory_keys("SMB/WindowsVersion");
  exit(0);
}

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


if(hotfix_check_sp(win2012R2:1) <= 0) {
  exit(0);
}

if(!registry_key_exists(key:"SOFTWARE\Microsoft\.NETFramework")) {
  if(!registry_key_exists(key:"SOFTWARE\Microsoft\ASP.NET")) {
    if(!registry_key_exists(key:"SOFTWARE\Microsoft\NET Framework Setup\NDP\v4\Full\")) {
      exit(0);
    }
  }
}

key_list = make_list("SOFTWARE\Microsoft\.NETFramework\", "SOFTWARE\Microsoft\ASP.NET\", "SOFTWARE\Microsoft\NET Framework Setup\NDP\v4\Full\");

foreach key(key_list) {
  if(".NETFramework" >< key) {
    foreach item (registry_enum_keys(key:key)) {
      NetPath = registry_get_sz(key:key, item:"InstallRoot");
      if(NetPath && "\Microsoft.NET\Framework" >< NetPath) {
        foreach item (registry_enum_keys(key:key)) {
          dotPath = NetPath + item;
          dllVer = fetch_file_version(sysPath:dotPath, file_name:"Mscorlib.dll");

          if(dllVer) {
            if(version_in_range(version:dllVer, test_version:"2.0.50727.5700", test_version2:"2.0.50727.8973")) {
              VULN = TRUE ;
              vulnerable_range = "2.0.50727.5700 - 2.0.50727.8973";
              break;
            }
            else if(version_in_range(version:dllVer, test_version:"4.7", test_version2:"4.7.4050.0")) {
              VULN = TRUE ;
              vulnerable_range = "4.7 - 4.7.4050.0" ;
              break;
            }

            else if(version_in_range(version:dllVer, test_version:"4.8", test_version2:"4.8.4644.0")) {
              VULN = TRUE ;
              vulnerable_range = "4.8 - 4.8.4644.0" ;
              break;
            }
          }
        }
        if(vulnerable_range){
          break;
        }
      }
    }

  }

  if((!vulnerable_range) && "ASP.NET" >< key) {
    foreach item (registry_enum_keys(key:key)){
      dotPath = registry_get_sz(key:key, item:"Path");
      if(dotPath && "\Microsoft.NET\Framework" >< dotPath) {
        dllVer = fetch_file_version(sysPath:dotPath, file_name:"Mscorlib.dll");

        if(dllVer) {
          if(version_in_range(version:dllVer, test_version:"2.0.50727.5700", test_version2:"2.0.50727.8973")) {
            VULN = TRUE ;
            vulnerable_range = "2.0.50727.5700 - 2.0.50727.8973";
            break;
          }
          else if(version_in_range(version:dllVer, test_version:"4.7", test_version2:"4.7.4050.0")) {
            VULN = TRUE ;
            vulnerable_range = "4.7 - 4.7.4050.0" ;
            break;
          }
          else if(version_in_range(version:dllVer, test_version:"4.8", test_version2:"4.8.4644")) {
            VULN = TRUE ;
            vulnerable_range = "4.8 - 4.8.4644" ;
            break;
          }
        }
      }
    }
  }

  ## For versions greater than 4.5 (https://docs.microsoft.com/en-us/dotnet/framework/migration-guide/how-to-determine-which-versions-are-installed#net_b)
  if((!vulnerable_range) && "NET Framework Setup" >< key) {
    dotPath = registry_get_sz(key:key, item:"InstallPath");
    if(dotPath && "\Microsoft.NET\Framework" >< dotPath) {
      dllVer = fetch_file_version(sysPath:dotPath, file_name:"Mscorlib.dll");

      if(dllVer) {
        if(version_in_range(version:dllVer, test_version:"2.0.50727.5700", test_version2:"2.0.50727.8973")) {
          VULN = TRUE ;
          vulnerable_range = "2.0.50727.5700 - 2.0.50727.8973";
          break;
        }
        else if(version_in_range(version:dllVer, test_version:"4.7", test_version2:"4.7.4050.0")) {
          VULN = TRUE ;
          vulnerable_range = "4.7 - 4.7.4050.0" ;
          break;
        }

        else if(version_in_range(version:dllVer, test_version:"4.8", test_version2:"4.8.4644")) {
          VULN = TRUE ;
          vulnerable_range = "4.8 - 4.8.4644" ;
          break;
        }
      }
    }
  }

  if(VULN) {
    report = report_fixed_ver(file_checked:dotPath + "\mscorlib.dll",
                              file_version:dllVer, vulnerable_range:vulnerable_range);
    security_message(data:report);
    exit(0);
  }
}
exit(99);