Siemens SICAM A8000 RTU Series Uncaught Exception (CVE-2018-13798)

#%NASL_MIN_LEVEL 70300
##
# (C) Tenable Network Security, Inc.
##

include('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(500226);
  script_version("1.7");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/09/04");

  script_cve_id("CVE-2018-13798");
  script_xref(name:"ICSA", value:"19-038-01");

  script_name(english:"Siemens SICAM A8000 RTU Series Uncaught Exception (CVE-2018-13798)");

  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 SICAM A8000 CP-8000 (All versions < V14), SICAM A8000 CP-802X (All versions <
V14), SICAM A8000 CP-8050 (All versions < V2.00). Specially crafted network packets sent to port 80/TCP or 443/TCP could
allow an unauthenticated remote attacker to cause a Denial-of-Service condition of the web server. The security
vulnerability could be exploited by an attacker with network access to the affected systems on port 80/TCP or 443/TCP.
Successful exploitation requires no system privileges and no user interaction. An attacker could use the vulnerability
to compromise availability of the web server. A system reboot is required to recover the web service of the device. At
the time of advisory update, exploit code for this security vulnerability is public.  

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-579309.pdf");
  script_set_attribute(attribute:"see_also", value:"https://www.cisa.gov/news-events/ics-advisories/icsa-19-038-01");
  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 released updates for all product variants and recommends users update to the new versions:

https://support.industry.siemens.com/cs/search?search=a8000%20cp8000

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

- Limit access to the web server on Ports 80/TCP and 443/TCP with an external firewall.
- Apply a Defense-in-Depth strategy.

For additional information see Siemens’ security advisory SSA-579309 at the following location:

http://www.siemens.com/cert/en/cert-security-advisories.htm");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:POC/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:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2018-13798");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_cwe_id(20);

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/03/21");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/03/21");
  script_set_attribute(attribute:"plugin_publication_date", value:"2022/02/07");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:sicam_a8000_cp-8000_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:sicam_a8000_cp-802x_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:sicam_a8000_cp-8050_firmware");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2022-2024 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:sicam_a8000_cp-8000_firmware" :
        {"versionEndExcluding" : "14", "family" : "SicamA8000CP800"},
    "cpe:/o:siemens:sicam_a8000_cp-802x_firmware" :
        {"versionEndExcluding" : "14", "family" : "SicamA8000CP802"},
    "cpe:/o:siemens:sicam_a8000_cp-8050_firmware" :
        {"versionEndExcluding" : "2.00", "family" : "SicamA8000CP805"}
};

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