Citrix Workspace App for Windows Multiple Vulnerabilities (CTX697034)

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

include('compat.inc');

if (description)
{
  script_id(349718);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/09/25");

  script_cve_id("CVE-2026-78546", "CVE-2026-78547");
  script_xref(name:"IAVA", value:"2026-A-1040");

  script_name(english:"Citrix Workspace App for Windows Multiple Vulnerabilities (CTX697034)");

  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 App installed on the remote Windows host is 2507 / 2507.1 LTSR prior to 2507.1 LTSR
CU3, or a Current Release prior to 2603.11. It is, therefore, affected by multiple vulnerabilities:

  - An out-of-bounds read vulnerability exists in Citrix Workspace app for Windows. An attacker with local
    access to the target system can exploit this to disclose sensitive information. (CVE-2026-78546)

  - An out-of-bounds write vulnerability exists in Citrix Workspace app for Windows. An attacker with physical
    access to the target system can exploit this to impact integrity and availability. (CVE-2026-78547)");
  # https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX697034
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?cbea1ed3");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Citrix Workspace App for Windows 2603.11 CR, 2507.1 LTSR CU3, 2607 LTSR or later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss4_vector", value:"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:L/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-2026-78547");
  script_set_attribute(attribute:"cvss4_score_source", value:"CVE-2026-78546");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/09/08");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/09/08");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/09/24");

  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) 2026 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' : '25.7.0.0', 'fixed_version' : '25.7.3000.3034', 'fixed_display' : '2507.1 LTSR CU3 or 2607 LTSR' },
        { 'min_version' : '25.8.0.0', 'fixed_version' : '26.3.11.10', 'fixed_display' : '2603.11 CR or 2607 LTSR' }
      ]
    }
  ]
};

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