Security Updates for Microsoft .NET Core (August 2022)

##
# (C) Tenable, Inc. 
##

include('compat.inc');

if (description)
{
  script_id(163974);
  script_version("1.8");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/01/16");

  script_cve_id("CVE-2022-34716");
  script_xref(name:"MSKB", value:"5016987");
  script_xref(name:"MSKB", value:"5016990");
  script_xref(name:"MSFT", value:"MS22-5016987");
  script_xref(name:"MSFT", value:"MS22-5016990");
  script_xref(name:"IAVA", value:"2022-A-0313-S");

  script_name(english:"Security Updates for Microsoft .NET Core (August 2022)");

  script_set_attribute(attribute:"synopsis", value:
"The Microsoft .NET core installations on the remote host are affected by a spoofing vulnerability.");
  script_set_attribute(attribute:"description", value:
"A spoofing vulnerability exists in .NET core 6.0 < 6.0.8 and .NET Core 3.1 < 3.1.28. An unauthenticated, remote
attacker can exploit this, to perform actions with the privileges of another user.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://support.microsoft.com/help/5016987");
  script_set_attribute(attribute:"see_also", value:"https://support.microsoft.com/help/5016990");
  script_set_attribute(attribute:"see_also", value:"https://dotnet.microsoft.com/download/dotnet/3.1");
  script_set_attribute(attribute:"see_also", value:"https://dotnet.microsoft.com/download/dotnet/6.0");
  # https://github.com/dotnet/core/blob/main/release-notes/3.1/3.1.28/3.1.28.md
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?327bb1fb");
  # https://github.com/dotnet/core/blob/main/release-notes/6.0/6.0.8/6.0.8.md
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?7ce182ee");
  script_set_attribute(attribute:"see_also", value:"https://github.com/dotnet/core/issues/7682");
  script_set_attribute(attribute:"solution", value:
"Update .NET Core Runtime to version 3.1.28 or 6.0.8.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:H/Au:N/C:C/I:N/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2022-34716");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2022/08/09");
  script_set_attribute(attribute:"patch_publication_date", value:"2022/08/09");
  script_set_attribute(attribute:"plugin_publication_date", value:"2022/08/10");

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

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

  script_copyright(english:"This script is Copyright (C) 2022-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("microsoft_dotnet_core_win.nbin", "macosx_dotnet_core_installed.nbin");
  script_require_ports("installed_sw/.NET Core Windows", "installed_sw/.NET Core MacOS");

  exit(0);
}

include('vcf.inc');

var app;
var win_local;

if (!empty_or_null(get_kb_item('SMB/Registry/Enumerated')))
{
  app = '.NET Core Windows';
  win_local = TRUE;
}
else if (!empty_or_null(get_kb_item('Host/MacOSX/Version')))
{
  app = '.NET Core MacOS';
  win_local = FALSE;
}
else
  audit(AUDIT_HOST_NOT, 'Windows or macOS');

var app_info = vcf::get_app_info(app:app, win_local:win_local);
var constraints = [
  {'min_version': '3.1', 'fixed_version': '3.1.28'},
  {'min_version': '6.0', 'fixed_version': '6.0.8'}
];

vcf::check_version_and_report(app_info:app_info, constraints:constraints, severity:SECURITY_WARNING);