Siemens RUGGEDCOM RST2428P Improper Input Validation (CVE-2026-23032)

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

include('compat.inc');

if (description)
{
  script_id(505408);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/07/17");

  script_cve_id("CVE-2026-23032");
  script_xref(name:"ICSA", value:"26-188-05");

  script_name(english:"Siemens RUGGEDCOM RST2428P Improper Input Validation (CVE-2026-23032)");

  script_set_attribute(attribute:"synopsis", value:
"The remote OT asset is affected by a vulnerability.");
  script_set_attribute(attribute:"description", value:
"In the Linux kernel, the following vulnerability has been resolved:
null_blk: fix kmemleak by releasing references to fault configfs items
When CONFIG_BLK_DEV_NULL_BLK_FAULT_INJECTION is enabled, the null-blk
driver sets up fault injection support by creating the timeout_inject,
requeue_inject, and init_hctx_fault_inject configfs items as children
of the top-level nullbX configfs group.    However, when the nullbX
device is removed, the references taken to  these fault-config
configfs items are not released. As a result,  kmemleak reports a
memory leak, for example:    unreferenced object 0xc00000021ff25c40
(size 32):    comm mkdir, pid 10665, jiffies 4322121578    hex dump
(first 32 bytes):      69 6e 69 74 5f 68 63 74 78 5f 66 61 75 6c 74 5f
init_hctx_fault_      69 6e 6a 65 63 74 00 88 00 00 00 00 00 00 00 00
inject..........    backtrace (crc 1a018c86):
__kmalloc_node_track_caller_noprof+0x494/0xbd8
kvasprintf+0x74/0xf4      config_item_set_name+0xf0/0x104
config_group_init_type_name+0x48/0xfc      fault_config_init+0x48/0xf0
0xc0080000180559e4      configfs_mkdir+0x304/0x814
vfs_mkdir+0x49c/0x604      do_mkdirat+0x314/0x3d0
sys_mkdir+0xa0/0xd8      system_call_exception+0x1b0/0x4f0
system_call_vectored_common+0x15c/0x2ec    Fix this by explicitly
releasing the references to the fault-config  configfs items when
dropping the reference to the top-level nullbX  configfs group.

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-253495.html");
  script_set_attribute(attribute:"see_also", value:"https://support.industry.siemens.com/cs/ww/en/view/110002573/");
  script_set_attribute(attribute:"see_also", value:"https://www.cisa.gov/news-events/ics-advisories/ICSA-26-188-05");
  script_set_attribute(attribute:"solution", value:
"Refer to the vendor advisory.");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/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:"cvss_score_source", value:"CVE-2026-23032");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_cwe_id(20);

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/01/31");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/06/02");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/06/18");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:ruggedcom_rst2428p_firmware");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 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:ruggedcom_rst2428p_firmware" :
        {"family" : "RuggedCom", "orderNumbers" : ['6GK6242-6PA00'], "versionEndExcluding" : "4.0"}
};

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