Splunk Enterprise 9.2.0 < 9.2.9, 9.3.0 < 9.3.7, 9.4.0 < 9.4.5, 10.0.0 < 10.0.1 (SVD-2025-1101)

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

include('compat.inc');

if (description)
{
  script_id(275170);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/01/21");

  script_cve_id("CVE-2025-20378");
  script_xref(name:"IAVA", value:"2025-A-0858-S");

  script_name(english:"Splunk Enterprise 9.2.0 < 9.2.9, 9.3.0 < 9.3.7, 9.4.0 < 9.4.5, 10.0.0 < 10.0.1 (SVD-2025-1101)");

  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-2025-1101 advisory.

  - In Splunk Enterprise versions below 10.0.1, 9.4.5, 9.3.7, 9.2.9, and Splunk Cloud Platform versions below
    10.0.2503.5, 9.3.2411.111, and 9.3.2408.121, an unauthenticated attacker could craft a malicious URL using
    the return_to parameter of the Splunk Web login endpoint. When an authenticated user visits the malicious
    URL, it could cause an unvalidated redirect to an external malicious site.To be successful, the attacker
    has to trick the victim into initiating a request from their browser. The unauthenticated attacker should
    not be able to exploit the vulnerability at will. (CVE-2025-20378)

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-2025-1101.html");
  script_set_attribute(attribute:"solution", value:
"Upgrade Splunk Enterprise to versions 10.0.1, 9.4.5, 9.3.7, 9.2.9, 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:H/Au:N/C:P/I:N/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2025-20378");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_cwe_id(601);

  script_set_attribute(attribute:"vuln_publication_date", value:"2025/11/12");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/11/12");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/11/12");

  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' : '9.2.0', 'fixed_version' : '9.2.9', 'license' : 'Enterprise' },
  { 'min_version' : '9.3.0', 'fixed_version' : '9.3.7', 'license' : 'Enterprise' },
  { 'min_version' : '9.4.0', 'fixed_version' : '9.4.5', 'license' : 'Enterprise' },
  { 'min_version' : '10.0.0', 'fixed_version' : '10.0.1', 'license' : 'Enterprise' }
];
vcf::splunk::check_version_and_report(
    app_info:app_info,
    constraints:constraints,
    severity:SECURITY_NOTE
);