Splunk Universal Forwarder 9.1 < 9.1.9, 9.2 < 9.2.6, 9.3 < 9.3.4, 9.4 < 9.4.2 (SVD-2025-0602)

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

include('compat.inc');

if (description)
{
  script_id(237829);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/06/06");

  script_cve_id("CVE-2025-20298");
  script_xref(name:"IAVA", value:"2025-A-0393");

  script_name(english:"Splunk Universal Forwarder 9.1 < 9.1.9, 9.2 < 9.2.6, 9.3 < 9.3.4, 9.4 < 9.4.2 (SVD-2025-0602)");

  script_set_attribute(attribute:"synopsis", value:
"An application running on a remote web server host is affected by a vulnerability");
  script_set_attribute(attribute:"description", value:
"The version of Splunk installed on the remote host is prior to tested version. It is, therefore, affected by a
vulnerability as referenced in the SVD-2025-0602 advisory.

  - In Universal Forwarder for Windows versions below 9.4.2, 9.3.4, 9.2.6, and 9.1.9, a new installation of or
    an upgrade to an affected version can result in incorrect permissions assignment in the Universal
    Forwarder for Windows Installation directory (by default, C:\Program Files\SplunkUniversalForwarder). This
    lets non-administrator users on the machine access the directory and all its contents. (CVE-2025-20298)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://advisory.splunk.com/advisories/SVD-2025-0602.html");
  script_set_attribute(attribute:"solution", value:
"Upgrade Universal Forwarder for Windows to versions 9.4.2, 9.3.4, 9.2.6, 9.1.9, or higher.");
  script_set_attribute(attribute:"agent", value:"all");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:C");
  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:L/UI:R/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:"cvss_score_source", value:"CVE-2025-20298");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_cwe_id(732);

  script_set_attribute(attribute:"vuln_publication_date", value:"2025/06/02");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/06/02");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/06/05");

  script_set_attribute(attribute:"potential_vulnerability", value:"true");
  script_set_attribute(attribute:"plugin_type", value:"combined");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:splunk:splunk");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:splunk:universal_forwarder");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"CGI abuses");

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

  script_dependencies("splunkd_detect.nasl", "splunk_web_detect.nasl", "macos_splunk_installed.nbin", "splunk_win_installed.nbin", "splunk_nix_installed.nbin", "splunk_universal_forwarder_nix_installed.nbin", "splunk_universal_forwarder_win_installed.nbin");
  script_require_keys("Settings/ParanoidReport");
  script_require_ports("installed_sw/Splunk", "installed_sw/Splunk Universal Forwarder");

  exit(0);
}

include('vcf.inc');
include('vcf_extras_splunk.inc');

get_kb_item_or_exit('SMB/Registry/Enumerated');

if (report_paranoia < 2) audit(AUDIT_PARANOID);

var app_info = vcf::splunk::get_app_info();

var constraints = [
  { 'min_version' : '9.1', 'fixed_version' : '9.1.9', 'license' : 'Forwarder' },
  { 'min_version' : '9.2', 'fixed_version' : '9.2.6', 'license' : 'Forwarder' },
  { 'min_version' : '9.3', 'fixed_version' : '9.3.4', 'license' : 'Forwarder' },
  { 'min_version' : '9.4', 'fixed_version' : '9.4.2', 'license' : 'Forwarder' }
];
vcf::splunk::check_version_and_report(
    app_info:app_info,
    constraints:constraints,
    severity:SECURITY_HOLE
);