Splunk Enterprise 9.1.0 < 9.1.10, 9.2.0 < 9.2.7, 9.3.0 < 9.3.5, 9.4.0 < 9.4.3 (SVD-2025-0704)

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

include('compat.inc');

if (description)
{
  script_id(241435);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/01/21");

  script_cve_id("CVE-2025-20321");
  script_xref(name:"IAVA", value:"2025-A-0502-S");

  script_name(english:"Splunk Enterprise 9.1.0 < 9.1.10, 9.2.0 < 9.2.7, 9.3.0 < 9.3.5, 9.4.0 < 9.4.3 (SVD-2025-0704)");

  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-2025-0704 advisory.

  - In Splunk Enterprise versions below 9.4.3, 9.3.5, 9.2.7, and 9.1.10, and Splunk Cloud Platform versions
    below 9.3.2411.104, 9.3.2408.114, and 9.2.2406.119, an unauthenticated attacker can send a specially-
    crafted SPL search that could change the membership state in a Splunk Search Head Cluster (SHC) through a
    Cross-Site Request Forgery (CSRF), potentially leading to the removal of the captain or a member of the
    SHC.The vulnerability requires the attacker to phish the administrator-level victim by tricking them into
    initiating a request within their browser. The attacker should not be able to exploit the vulnerability at
    will. (CVE-2025-20321)

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-2025-0704.html");
  script_set_attribute(attribute:"solution", value:
"Upgrade Splunk Enterprise to versions 9.4.3, 9.3.5, 9.2.7, 9.1.10, or higher.Splunk is actively monitoring and patching
Splunk Cloud Platform instances.");
  script_set_attribute(attribute:"agent", value:"all");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/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:N/UI:R/S:U/C:N/I:N/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-2025-20321");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_cwe_id(352);

  script_set_attribute(attribute:"vuln_publication_date", value:"2025/07/07");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/07/07");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/07/07");

  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:"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) 2025-2026 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");
  script_require_keys("installed_sw/Splunk", "Settings/ParanoidReport");

  exit(0);
}

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

if (report_paranoia < 2) audit(AUDIT_PARANOID);

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

var constraints = [
  { 'min_version' : '9.1.0', 'fixed_version' : '9.1.10', 'license' : 'Enterprise' },
  { 'min_version' : '9.2.0', 'fixed_version' : '9.2.7', 'license' : 'Enterprise' },
  { 'min_version' : '9.3.0', 'fixed_version' : '9.3.5', 'license' : 'Enterprise' },
  { 'min_version' : '9.4.0', 'fixed_version' : '9.4.3', 'license' : 'Enterprise' }
];
vcf::splunk::check_version_and_report(
    app_info:app_info,
    constraints:constraints,
    severity:SECURITY_HOLE,
    flags:{'xsrf':TRUE}
);