Siemens TIM 4R-IE Devices Improper Authentication (CVE-2016-4953)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##

include('compat.inc');

if (description)
{
  script_id(501103);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/07/24");

  script_cve_id("CVE-2016-4953");
  script_xref(name:"SuSE", value:"openSUSE-SU-2016:1583");
  script_xref(name:"SuSE", value:"SUSE-SU-2016:1563");
  script_xref(name:"SuSE", value:"SUSE-SU-2016:1584");
  script_xref(name:"SuSE", value:"SUSE-SU-2016:1602");
  script_xref(name:"SuSE", value:"openSUSE-SU-2016:1636");
  script_xref(name:"GLSA", value:"GLSA-201607-15");
  script_xref(name:"FREEBSD", value:"FreeBSD-SA-16:24");

  script_name(english:"Siemens TIM 4R-IE Devices Improper Authentication (CVE-2016-4953)");

  script_set_attribute(attribute:"synopsis", value:
"The remote OT asset is affected by a vulnerability.");
  script_set_attribute(attribute:"description", value:
"ntpd in NTP 4.x before 4.2.8p8 allows remote attackers to cause a
denial of service (ephemeral-association demobilization) by sending a
spoofed crypto-NAK packet with incorrect authentication data at a
certain time.

This plugin only works with Tenable.ot.
Please visit https://www.tenable.com/products/tenable-ot for more information.");
  script_set_attribute(attribute:"see_also", value:"http://www.kb.cert.org/vuls/id/321640");
  script_set_attribute(attribute:"see_also", value:"http://support.ntp.org/bin/view/Main/NtpBug3045");
  script_set_attribute(attribute:"see_also", value:"http://bugs.ntp.org/3045");
  script_set_attribute(attribute:"see_also", value:"http://support.ntp.org/bin/view/Main/SecurityNotice");
  # http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00023.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?cb7c151d");
  # http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00018.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?f03b0a18");
  # http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00024.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?cebdff21");
  # http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00028.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?acf30d43");
  # http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00040.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?7bcd4367");
  # http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?eb5f426b");
  script_set_attribute(attribute:"see_also", value:"http://www.securityfocus.com/bid/91010");
  # https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03757en_us
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?14258ed1");
  script_set_attribute(attribute:"see_also", value:"https://security.gentoo.org/glsa/201607-15");
  script_set_attribute(attribute:"see_also", value:"http://www.securitytracker.com/id/1036037");
  script_set_attribute(attribute:"see_also", value:"https://security.FreeBSD.org/advisories/FreeBSD-SA-16:24.ntp.asc");
  script_set_attribute(attribute:"see_also", value:"https://cert-portal.siemens.com/productcert/pdf/ssa-497656.pdf");
  script_set_attribute(attribute:"see_also", value:"https://us-cert.cisa.gov/ics/advisories/icsa-21-103-11");
  script_set_attribute(attribute:"see_also", value:"https://cert-portal.siemens.com/productcert/pdf/ssa-211752.pdf");
  script_set_attribute(attribute:"solution", value:
"The following text was originally created by the Cybersecurity and Infrastructure Security Agency (CISA). The original
can be found at CISA.gov.

Siemens has identified the following specific workarounds and mitigations users can apply to reduce the risk:

- Deactivate NTP-based time synchronization of the device, if enabled. The feature is disabled by default.
- Configure an additional firewall to prevent communication to the Port UDP/123 of an affected device.
- Migrate to a successor product.

As a general security measure, Siemens strongly recommends protecting network access to devices with appropriate
mechanisms. In order to operate the devices in a protected IT environment, Siemens recommends configuring the
environment according to Siemens operational guidelines for Industrial Security and following the recommendations in the
product manuals.

For additional information, please refer to Siemens Security Advisory SSA-497656");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2016-4953");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_cwe_id(287);

  script_set_attribute(attribute:"vuln_publication_date", value:"2016/07/05");
  script_set_attribute(attribute:"patch_publication_date", value:"2016/07/05");
  script_set_attribute(attribute:"plugin_publication_date", value:"2023/05/02");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:simatic_net_cp_443-1_opc_ua_firmware");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Tenable.ot");

  script_copyright(english:"This script is Copyright (C) 2023 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("tenable_ot_api_integration.nasl");
  script_require_keys("Tenable.ot/Siemens");

  exit(0);
}


include('tenable_ot_cve_funcs.inc');

get_kb_item_or_exit('Tenable.ot/Siemens');

var asset = tenable_ot::assets::get(vendor:'Siemens');

var vuln_cpes = {
    "cpe:/o:siemens:simatic_net_cp_443-1_opc_ua_firmware" :
        {"family" : "S7400"}
};

tenable_ot::cve::compare_and_report(asset:asset, cpes:vuln_cpes, severity:SECURITY_WARNING);