Zscaler Client Connector < 4.2.0.190 Multiple Vulnerabilities

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

include('compat.inc');

if (description)
{
  script_id(265426);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/09/19");

  script_cve_id("CVE-2023-28806", "CVE-2024-23456", "CVE-2024-23458");
  script_xref(name:"IAVB", value:"2024-B-0102");

  script_name(english:" Zscaler Client Connector < 4.2.0.190 Multiple Vulnerabilities");

  script_set_attribute(attribute:"synopsis", value:
"Zscaler Client Connector installed on remote Windows host is affected by multiple vulnerabilities");
  script_set_attribute(attribute:"description", value:
"The version of Zscaler Client Connector installed on the remote Windows host is prior to 4.2.0.190. It is, therefore,
affected by multiple vulnerabilities.

  - An Improper Validation of signature in Zscaler Client Connector on Windows allows an authenticated user to disable
    anti-tampering. This issue affects Client Connector on Windows < 4.2.0.190. (CVE-2023-28806)

  - Anti-tampering can be disabled under certain conditions without signature validation. This affects Zscaler Client
    Connector < 4.2.0.190 with anti-tampering enabled. (CVE-2024-23456)

  - While copying individual autoupdater log files, reparse point check was missing which could result into crafted
    attacks, potentially leading to a local privilege escalation. This issue affects Zscaler Client Connector on Windows
    < 4.2.0.190. (CVE-2024-23458)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
  # https://help.zscaler.com/zscaler-client-connector/client-connector-app-release-summary-2023?applicable_category=windows&applicable_version=4.2.0.190
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?70a8c00b");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Zscaler Client Connector version 4.2.0.190 or later.");
  script_set_attribute(attribute:"agent", value:"windows");
  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:U/C:H/I:H/A:H");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2024-23458");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2024-23458");

  script_set_attribute(attribute:"vuln_publication_date", value:"2024/08/06");
  script_set_attribute(attribute:"patch_publication_date", value:"2024/08/06");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/09/19");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:zscaler:client_connector");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

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

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

  script_dependencies("zscaler_client_connector_win_installed.nbin");
  script_require_keys("installed_sw/Zscaler Client Connector", "SMB/Registry/Enumerated");

  exit(0);
}

include('vcf.inc');

get_kb_item_or_exit('SMB/Registry/Enumerated');

var app_info = vcf::get_app_info(app:'Zscaler Client Connector', win_local:TRUE);

var constraints = [
  { 'fixed_version' : '4.2.0.190' }
];

vcf::check_version_and_report(
    app_info:app_info,
    constraints:constraints,
    severity:SECURITY_WARNING
);