.NET Core Multiple Vulnerabilities (KB5029688, KB5029689) - Windows

# 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

CPE = "cpe:/a:microsoft:asp.net_core";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.832386");
  script_version("2023-10-13T05:06:10+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-2023-35390", "CVE-2023-38180", "CVE-2023-35391", "CVE-2023-38178");
  script_tag(name:"cvss_base", value:"7.2");
  script_tag(name:"cvss_base_vector", value:"AV:L/AC:L/Au:N/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:L/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:"2023-08-08 18:33:00 +0000 (Tue, 08 Aug 2023)");
  script_tag(name:"creation_date", value:"2023-08-09 10:40:13 +0530 (Wed, 09 Aug 2023)");
  script_name(".NET Core Multiple Vulnerabilities (KB5029688, KB5029689) - Windows");

  script_tag(name:"summary", value:".NET Core prone to security feature bypass
  and elevation of privilege vulnerabilities.");

  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,

  - A vulnerability exists when some dotnet commands are used in
    directories with weaker permissions which can result in remote code execution.

  - A vulnerability exists in Kestrel where, on detecting a potentially malicious
    client, Kestrel will sometimes fail to disconnect it, resulting in denial of service.");

  script_tag(name:"impact", value:"Successful exploitation would allow an attacker
  to bypass security restrictions, achieve cross-session/cross-user elevation of
  privilege (EoP) and code execution.");

  script_tag(name:"affected", value:".NET Core runtime 6.0 before 6.0.21, 7.0 before
  7.0.10 and .NET Core SDK before 6.0.121, 6.0.316, 7.0.400.");

  script_tag(name:"solution", value:"Upgrade to versions 6.0.21 or 7.0.10 or later or
  upgrade .NET Core SDK to versions 6.0.121 or 6.0.316 or
  7.0.400 or later.");

  script_tag(name:"solution_type", value:"VendorFix");
  script_tag(name:"qod_type", value:"registry");
  script_xref(name:"URL", value:"https://github.com/dotnet/core/blob/main/release-notes/6.0/6.0.21/6.0.21.md");
  script_xref(name:"URL", value:"https://github.com/dotnet/core/blob/main/release-notes/7.0/7.0.10/7.0.10.md");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2023 Greenbone AG");
  script_family("Windows");
  script_dependencies("gb_asp_dotnet_core_detect_win.nasl");
  script_mandatory_keys("ASP.NET/Core/Ver");
  exit(0);
}

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

if(!infos = get_app_version_and_location(cpe:CPE, exit_no_version:TRUE))
  exit(0);

vers = infos["version"];
path = infos["location"];

if(!vers || vers !~ "^[6|7]\.0")
  exit(0);

if(!corerunVer = get_kb_item(".NET/Core/Runtime/Ver")) {
  if(!codesdkVer = get_kb_item(".NET/Core/SDK/Ver")) {
    exit(0);
  }
}

if(corerunVer) {
  if(version_in_range(version:corerunVer, test_version:"6.0", test_version2:"6.0.20")) {
    fix = "6.0.21 or later";
  } else if(version_in_range(version:corerunVer, test_version:"7.0", test_version2:"7.0.10")) {
      fix = "7.0.9 or later";
  }
}

else if(codesdkVer) {
  if(version_in_range(version:codesdkVer, test_version:"6.0", test_version2:"6.0.120") ||
     version_in_range(version:codesdkVer, test_version:"6.0.300", test_version2:"6.0.315")) {
    fix1 = "6.0.121 or 6.0.316 or later";
  }
  else if(version_in_range(version:codesdkVer, test_version:"7.0.300", test_version2:"7.0.399")) {
    fix1 = "7.0.400 or later";
  }
}

if(fix) {
  report = report_fixed_ver(installed_version:"ASP .NET Core With Microsoft .NET Core runtimes " + corerunVer,
               fixed_version:"ASP .NET Core With Microsoft .NET Core runtimes version " + fix, install_path:path);
  security_message(port:0, data:report);
  exit(0);
}
else if(fix1) {
  report = report_fixed_ver(installed_version:"ASP .NET Core With Microsoft .NET Core SDK " + codesdkVer,
               fixed_version:"ASP .NET Core With Microsoft .NET Core SDK version " + fix1, install_path:path);
  security_message(port:0, data:report);
  exit(0);
}

exit(99);