Siemens CP1604 and CP1616 Cleartext Transmission of Sensitive Information (CVE-2018-13808)

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

include('compat.inc');

if (description)
{
  script_id(502002);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/03/04");

  script_cve_id("CVE-2018-13808");

  script_name(english:"Siemens CP1604 and CP1616 Cleartext Transmission of Sensitive Information (CVE-2018-13808)");

  script_set_attribute(attribute:"synopsis", value:
"The remote OT asset is affected by a vulnerability.");
  script_set_attribute(attribute:"description", value:
"A vulnerability has been identified in CP 1604 (All versions), CP 1616
(All versions). An attacker with network access to port 23/tcp could
extract internal communication data or cause a Denial-of-Service
condition. Successful exploitation requires network access to a
vulnerable device. At the time of advisory publication no public
exploitation of this vulnerability was known.

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:"https://cert-portal.siemens.com/productcert/pdf/ssa-559174.pdf");
  script_set_attribute(attribute:"see_also", value:"https://www.cisa.gov/news-events/ics-advisories/icsa-19-043-06");
  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 recommends users update to version 2.8.

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

- Disable the integrated web server. The web server is disabled in the default settings and its use is optional. Use in
a productive environment is discouraged.
- Restrict access to the device to the internal or VPN network. Further restrict access to the web interface (80/TCP)
and to the telnet port (23/TCP) to trusted IP addresses if possible.
- Do not click on links from unknown sources.

- Fixes for CVE-2018-13808 have also been released in versions v2.5.2.7, v2.6.2.2, and v2.7.2.1.

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
(https://www.siemens.com/cert/operational-guidelines-industrial-security), and following the recommendations in the
product manuals.

Additional information on industrial security by Siemens can be found at: 

https://www.siemens.com/industrialsecurity

For more information on these vulnerabilities and associated software updates, please see Siemens security advisory
SSA-559174 on their website:

https://www.siemens.com/cert/advisories");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/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:H/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-2018-13808");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_cwe_id(200);

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/04/17");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/04/17");
  script_set_attribute(attribute:"plugin_publication_date", value:"2024/02/20");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:cp_1604_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:cp_1616_firmware");
  script_set_attribute(attribute:"generated_plugin", value:"former");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2024 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:cp_1604_firmware" :
        {"versionEndIncluding" : "2.8", "family" : "NETCP1600"},
    "cpe:/o:siemens:cp_1616_firmware" :
        {"versionEndIncluding" : "2.8", "family" : "NETCP1600"}
};

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