Citrix Workspace App for Windows Privilege Escalation (CTX694718)

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

include('compat.inc');

if (description)
{
  script_id(240642);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/07/08");

  script_cve_id("CVE-2025-4879");
  script_xref(name:"IAVA", value:"2025-A-0450");

  script_name(english:"Citrix Workspace App for Windows Privilege Escalation (CTX694718)");

  script_set_attribute(attribute:"synopsis", value:
"The remote host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"The version of Citrix Workspace installed on the remote host is affected by a privilege escalation vulnerability as 
referenced in the CTX694718 advisory.

  - Local Privilege escalation allows a low-privileged user to gain SYSTEM privileges in Citrix Workspace app 
    for Windows (CVE-2025-4879)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  # https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX694718
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?5bda166b");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Citrix Workspace version 2409 CR, 2402 LTSR CU3 Hotfix 1. 2402 LTSR CU2 Hotfix 1 or later.");
  script_set_attribute(attribute:"cvss4_vector", value:"CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N");
  script_set_attribute(attribute:"cvss4_threat_vector", value:"CVSS:4.0/E:U");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2025-4879");

  script_set_attribute(attribute:"vuln_publication_date", value:"2025/06/17");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/06/17");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/06/26");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:citrix:workspace");
  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("citrix_workspace_win_installed.nbin");
  script_require_keys("installed_sw/Citrix Workspace", "SMB/Registry/Enumerated");

  exit(0);
}


include('vdf.inc');

# @tvdl-content
var vuln_data = {
  'metadata': {'spec_version': '1.0'},
  'requires': [
    {'scope': 'target', 'match': {'os': 'windows'}}
  ],
  'checks': [
    {
      'product': {'name': 'Citrix Workspace', 'type': 'app'},
      'check_algorithm': 'default',
      'constraints' : [
          { 'min_version' : '24.2.0.0', 'fixed_version' : '24.2.2001.3', 'fixed_display' : '2402 LTSR CU2 Hotfix 1 / 2402 LTSR CU3 Hotfix 1' },
          { 'min_version' : '24.3.0.0', 'fixed_version' : '24.9.0.201', 'fixed_display' : '2409 CR' }
      ]
    }
  ]
};

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