Siemens LOGO! 8 BM Devices Buffer Copy Without Checking Size of Input (CVE-2025-40815)

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

include('compat.inc');

if (description)
{
  script_id(504867);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/02/20");

  script_cve_id("CVE-2025-40815");
  script_xref(name:"ICSA", value:"25-317-13");

  script_name(english:"Siemens LOGO! 8 BM Devices Buffer Copy Without Checking Size of Input (CVE-2025-40815)");

  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
- LOGO! 12/24RCE (6ED1052-1MD08-0BA2) (All versions)
- LOGO! 12/24RCEo (6ED1052-2MD08-0BA2) (All versions)
- LOGO! 230RCE (6ED1052-1FB08-0BA2) (All versions)
- LOGO! 230RCEo (6ED1052-2FB08-0BA2) (All versions)
- LOGO! 24CE (6ED1052-1CC08-0BA2) (All versions)
- LOGO! 24CEo (6ED1052-2CC08-0BA2) (All versions)
- LOGO! 24RCE (6ED1052-1HB08-0BA2) (All versions)
- LOGO! 24RCEo (6ED1052-2HB08-0BA2) (All versions)
- SIPLUS LOGO! 12/24RCE (6AG1052-1MD08-7BA2) (All versions)
- SIPLUS LOGO! 12/24RCEo (6AG1052-2MD08-7BA2) (All versions)
- SIPLUS LOGO! 230RCE (6AG1052-1FB08-7BA2) (All versions)
- SIPLUS LOGO! 230RCEo (6AG1052-2FB08-7BA2) (All versions)
- SIPLUS LOGO! 24CE (6AG1052-1CC08-7BA2) (All versions)
- SIPLUS LOGO! 24CEo (6AG1052-2CC08-7BA2) (All versions)
- SIPLUS LOGO! 24RCE (6AG1052-1HB08-7BA2) (All versions)
- SIPLUS LOGO! 24RCEo (6AG1052-2HB08-7BA2) (All versions).

Affected devices do not conduct certain validations when interacting with them.
This could allow an unauthenticated remote attacker to manipulate the devices
IP address, which means the device would not be reachable.

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/html/ssa-267056.html");
  script_set_attribute(attribute:"see_also", value:"https://www.cisa.gov/news-events/ics-advisories/icsa-25-317-13");
  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 is preparing fixed versions and recommends specific countermeasures for products where fixes are not available
or not yet available. Siemens has identified the following specific workarounds and mitigations users can apply to
reduce risk:

- (CVE-2025-40815) Protect the LSC access to the device with a strong password. Currently no fix is available.
- (CVE-2025-40816, CVE-2025-40817) Restrict network access to port 10006/udp to trusted IP addresses. Currently no fix
is planned.

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

Additional information on industrial security by Siemens can be found on the Siemens industrial security webpage

For more information see the associated Siemens security advisory SSA-267056 in HTML and CSAF.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:M/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:H/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-2025-40815");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_cwe_id(306);

  script_set_attribute(attribute:"vuln_publication_date", value:"2025/11/11");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/11/11");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/12/19");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:logo%21_12%2f24rce");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:logo%21_12%2f24rceo");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:logo%21_230rce");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:logo%21_230rceo");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:logo%21_24ce");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:logo%21_24ceo");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:logo%21_24rce");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:logo%21_24rceo");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:siplus_logo%21_12%2f24rce");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:siplus_logo%21_12%2f24rceo");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:siplus_logo%21_230rce");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:siplus_logo%21_230rceo");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:siplus_logo%21_24ce");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:siplus_logo%21_24ceo");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:siplus_logo%21_24rce");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:siplus_logo%21_24rceo");
  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) 2025-2026 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:logo%218_bm_firmware" :
        {"versionEndIncluding" : "8.4", "family" : "LOGO!BM", orderNumbers: ['6ED1052-1MD08-0BA2','6ED1052-2MD08-0BA2','6ED1052-1FB08-0BA2','6ED1052-2FB08-0BA2','6ED1052-1CC08-0BA2','6ED1052-2CC08-0BA2','6ED1052-1HB08-0BA2','6ED1052-2HB08-0BA2']},
      "cpe:/o:siemens:siplus_logo%218_bm_firmware":
        {"versionEndIncluding" : "8.4", "family" : "LOGO!BM", orderNumbers: ['6AG1052-1MD08-7BA2','6AG1052-2MD08-7BA2','6AG1052-1FB08-7BA2','6AG1052-2FB08-7BA2','6AG1052-1CC08-7BA2','6AG1052-2CC08-7BA2','6AG1052-1HB08-7BA2','6AG1052-2HB08-7BA2']}
};

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