Schneider Electric Relative Path Traversal in embedded Rockwell Automation ISaGRAF5 Runtime (CVE-2020-25176)

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

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

if (description)
{
  script_id(500638);
  script_version("1.5");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/10/31");

  script_cve_id("CVE-2020-25176");

  script_name(english:"Schneider Electric Relative Path Traversal in embedded Rockwell Automation ISaGRAF5 Runtime (CVE-2020-25176)");

  script_set_attribute(attribute:"synopsis", value:
"The remote OT asset is affected by a vulnerability.");
  script_set_attribute(attribute:"description", value:
"Some commands used by the Rockwell Automation ISaGRAF Runtime Versions
4.x and 5.x eXchange Layer (IXL) protocol perform various file
operations in the file system. Since the parameter pointing to the
file name is not checked for reserved characters, it is possible for a
remote, unauthenticated attacker to traverse an application's
directory, which could lead to remote code execution.

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://www.cisa.gov/uscert/ics/advisories/icsa-20-280-01");
  # https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2021-159-04
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?92e65ec9");
  # https://rockwellautomation.custhelp.com/app/answers/answer_view/a_id/1131699
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?4dce6d5b");
  # https://www.xylem.com/siteassets/about-xylem/cybersecurity/advisories/xylem-multismart-rockwell-isagraf.pdf
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?659f30cf");
  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.

Rockwell Automation recommends users update to ISaGRAF Runtime 5 Version 5.72.00. End users are encouraged to restrict
or block access on TCP 1131 and TCP 1132 from outside the industrial control system. Confirm the least-privilege user
principle is followed and user/service account access to Runtime's folder location is granted with a minimum amount of
rights needed.

Rockwell Automation recommends users of affected versions evaluate the mitigations provided and apply the appropriate
mitigations to deployed products. Users are encouraged to combine this guidance with the general security guidelines for
a comprehensive defense-in-depth strategy.

To reduce risk, Rockwell Automation recommends users:

- Employ proper network segmentation and security controls.
- Minimize network exposure for all control system devices.
- Locate control systems behind firewalls.
- Isolate control systems from other networks when possible.
- Refer to the Converged Plantwide Ethernet (CPwE) Design and Implementation Guide for best practices deploying network
segmentation and broader defense-in-depth strategies.
- Consider using proper network infrastructure controls, such as firewalls, UTM devices, VPN, or other security
appliances.
- Ensure the least-privilege user principle is followed, and user/service account access to Runtime’s folder location is
granted with a minimum amount of rights, as needed.

Please see publications from Rockwell Automation and Schneider Electric, Xylem, or contact GE for further information
about how to mitigate these vulnerabilities in additional affected products.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:C/I:C/A:C");
  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:H/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-2020-25176");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_cwe_id(22);

  script_set_attribute(attribute:"vuln_publication_date", value:"2022/03/18");
  script_set_attribute(attribute:"patch_publication_date", value:"2022/03/18");
  script_set_attribute(attribute:"plugin_publication_date", value:"2022/04/28");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:schneider-electric:micom_c264_firmware");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2022-2023 and is owned by Tenable, Inc. or an Affiliate thereof.");

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

  exit(0);
}


include('tenable_ot_cve_funcs.inc');

get_kb_item_or_exit('Tenable.ot/Schneider');

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

var vuln_cpes = {
    "cpe:/o:schneider-electric:micom_c264_firmware" :
        {"versionEndExcluding" : "d6.1", "family" : "Micom"}
};

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