Rockwell Automation RSLinx Classic < 4.60 Multiple Vulnerabilities (SD1794)

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

include('compat.inc');

if (description)
{
  script_id(342353);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/09/03");

  script_cve_id(
    "CVE-2026-9621",
    "CVE-2026-9622",
    "CVE-2026-9624",
    "CVE-2026-9625"
  );
  script_xref(name:"ICSA", value:"26-244-01");

  script_name(english:"Rockwell Automation RSLinx Classic < 4.60 Multiple Vulnerabilities (SD1794)");

  script_set_attribute(attribute:"synopsis", value:
"An application installed on the remote Windows host is affected by multiple denial of service
vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The version of Rockwell Automation RSLinx Classic installed on the remote Windows host is 4.50 or prior. It is,
therefore, affected by multiple denial of service vulnerabilities:

  - A denial-of-service security issue exists within RSLinx Classic. The security issue stems from improper handling
    of a malformed packet. A crafted CIP packet can cause the RSLinx Classic service to crash, requiring a restart of
    the service to recover. (CVE-2026-9621)

  - A denial-of-service security issue exists within RSLinx Classic. A crafted CIP packet targeting the Forward Close
    service can cause the RSLinx Classic service to crash, requiring a restart of the service to recover.
    (CVE-2026-9622)

  - A denial-of-service security issue exists within RSLinx Classic. A crafted CIP packet can cause the RSLinx Classic
    service to crash due to insufficient data length validation, requiring a restart of the service to recover.
    (CVE-2026-9624)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  # https://www.rockwellautomation.com/en-us/trust-center/security-advisories/advisory.SD1794.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?26912f52");
  script_set_attribute(attribute:"see_also", value:"https://www.cisa.gov/news-events/ics-advisories/icsa-26-244-01");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Rockwell Automation RSLinx Classic version 4.60 or later.");
  script_set_attribute(attribute:"agent", value:"windows");
  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:"cvss4_vector", value:"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H");
  script_set_attribute(attribute:"cvss4_threat_vector", value:"CVSS:4.0/E:U");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-9621");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/09/01");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/09/01");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/09/02");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:rockwellautomation:rslinx_classic");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2026 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("scada_app_rslinx_classic_detect.nbin");
  script_require_keys("installed_sw/Rockwell Automation RSLinx Classic", "SMB/Registry/Enumerated");

  exit(0);
}

include('vdf.inc');

# @tvdl-content
var vuln_data = {
  'metadata': {'spec_version': '1.0'},
  'requires': [
    {'scope': 'target', 'match': {'os': 'windows'}}
  ],
  'checks': [
    {
      'product': {'name': 'Rockwell Automation RSLinx Classic', 'type': 'app'},
      'check_algorithm': 'default',
      'constraints': [
        {'fixed_version': '4.60'}
      ]
    }
  ]
};

var result = vdf::check_and_report(vuln_data:vuln_data, severity:SECURITY_WARNING);
vdf::handle_check_and_report_errors(vdf_result:result);