IGEL OS < 11.0.0 Secure Boot bypass (CVE-2025-47827)

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

include('compat.inc');

if (description)
{
  script_id(282474);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/02/18");

  script_cve_id("CVE-2025-47827");
  script_xref(name:"CISA-KNOWN-EXPLOITED", value:"2025/11/04");

  script_name(english:"IGEL OS < 11.0.0 Secure Boot bypass (CVE-2025-47827)");

  script_set_attribute(attribute:"synopsis", value:
"The remote IGEL OS host is affected by a Secure Boot bypass vulnerability..");
  script_set_attribute(attribute:"description", value:
"The version of IGEL OS running on the remote host is prior to version 11. It is, therefore, affected by a 
cryptographic signature verification vulnerability in the igel-flash-driver module. 

An attacker could exploit this flaw to bypass Secure Boot protections. By leveraging the improper verification, 
a crafted root filesystem can be mounted from an unverified SquashFS image, leading to a complete compromise 
of the system's chain of trust.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  # https://kb.igel.com/en/security-safety/current/isn-2025-22-statement-on-cve-2025-47827-in-igel-os
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?83aa905c");
  script_set_attribute(attribute:"solution", value:
"Upgrade to 11.0 or later");
  script_set_cvss3_base_vector("CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:F/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2025-47827");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2025/05/06");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/05/06");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/01/08");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:igel:igel_os");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Misc.");

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

  script_dependencies("igel_os_detect.nbin");
  script_require_keys("installed_sw/IGEL OS", "Host/IGEL OS");

  exit(0);
}
include('vdf.inc');

# @tvdl-content
var vuln_data = {
  'metadata': {'spec_version': '1.0'},
  'checks': [
    {
      'product': {'name': 'IGEL OS', 'type': 'app'},
      'check_algorithm': 'default',
      'constraints': [
        { 'fixed_version' : '11.0.0'}
      ]
    }
  ]
};
var result = vdf::check_and_report(vuln_data:vuln_data, severity:SECURITY_WARNING);
vdf::handle_check_and_report_errors(vdf_result:result);