Tenable Nessus Agent < 10.8.5 Multiple Vulnerabilities (TNS-2025-11) (Windows)

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

include('compat.inc');

if (description)
{
  script_id(238433);
  script_version("1.6");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/02/24");

  script_cve_id("CVE-2025-36631", "CVE-2025-36632", "CVE-2025-36633");
  script_xref(name:"IAVA", value:"2025-A-0436-S");

  script_name(english:"Tenable Nessus Agent < 10.8.5 Multiple Vulnerabilities (TNS-2025-11) (Windows)");

  script_set_attribute(attribute:"synopsis", value:
"An instance of Nessus Agent installed on the remote Windows system is affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"According to its self-reported version, the Tenable Nessus Agent running on the remote Windows host is prior to 
10.8.5. It is, therefore, affected by multiple vulnerabilities as referenced in the TNS-2025-11 advisory.

  - In Tenable Agent versions prior to 10.8.5 on a Windows host, it was found that a non-administrative
    user could overwrite arbitrary local system files with log content at SYSTEM privilege. -
    CVE-2025-366312. In Tenable Agent versions prior to 10.8.5 on a Windows host, it was found that a non-
    administrative user could execute code with SYSTEM privilege. - CVE-2025-366323. In Tenable Agent versions
    prior to 10.8.5 on a Windows host, it was found that a non-administrative user could arbitrarily delete
    local system files with SYSTEM privilege, potentially leading to local privilege escalation. -
    CVE-2025-36633 Tenable has released Agent 10.8.5 to address these issues. The installation files can be
    obtained from the Tenable Downloads Portal: https://www.tenable.com/downloads/nessus-agents
    (CVE-2025-36631, CVE-2025-366312, CVE-2025-36632, CVE-2025-366323, CVE-2025-36633, CVE-2025-366331)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://www.tenable.com/security/TNS-2025-11");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Tenable Nessus Agent 10.8.5, 10.9.0 or later.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:S/C:C/I:C/A:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2025-36633");

  script_set_attribute(attribute:"vuln_publication_date", value:"2025/06/12");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/06/12");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/06/13");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:tenable:nessus_agent");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_set_attribute(attribute:"thorough_tests", value:"true");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2025-2026 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("tenable_nessus_agent_installed_win.nbin");
  script_require_keys("installed_sw/Tenable Nessus Agent");

  exit(0);
}

include('vdf.inc');

# @tvdl-content
var vuln_data = {
  'metadata': {'spec_version': '1.0'},
  'requires': [
    {'scope': 'target', 'match': {'os': 'windows'}}
  ],
  'checks': [
    {
      'product': {'name': 'Tenable Nessus Agent', 'type': 'app'},
      'check_algorithm': 'default',
      'constraints' : [
        {'fixed_version': '10.8.5', 'fixed_display': '10.8.5 / 10.9.0'}
      ]
    }
  ]
};

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