Splunk Universal Forwarder < 9.0 Insecure Default Configuration

##
# (C) Tenable, Inc.
##

include('compat.inc');

if (description)
{
  script_id(164077);
  script_version("1.6");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/03/23");

  script_cve_id("CVE-2022-32155");
  script_xref(name:"IAVA", value:"2022-A-0251-S");

  script_name(english:"Splunk Universal Forwarder < 9.0 Insecure Default Configuration");

  script_set_attribute(attribute:"synopsis", value:
"An application running on a remote web server host may be affected by an insecure default configuration.");
  script_set_attribute(attribute:"description", value:
"In universal forwarder versions before 9.0, management services are available remotely by default. When not required,
it introduces a potential exposure, but it is not a vulnerability. If exposed, we recommend each customer assess the
potential severity specific to your environment. In Splunk 9.0, the universal forwarder now binds the management port
to localhost preventing remote logins by default.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  # https://www.splunk.com/en_us/product-security/announcements/svd-2022-0605.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?19a85742");
  script_set_attribute(attribute:"solution", value:
"Upgrade Splunk Universal Forwarder to version 9.0, or later.");
  script_set_attribute(attribute:"agent", value:"all");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/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:L/PR:N/UI:N/S:U/C:H/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-2022-32155");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2022/06/14");
  script_set_attribute(attribute:"patch_publication_date", value:"2022/06/14");
  script_set_attribute(attribute:"plugin_publication_date", value:"2022/08/11");

  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:universal_forwarder");
  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) 2022-2023 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);
}

# Configuration change mentioned as workaround which we can't detect.
if (report_paranoia < 2) audit(AUDIT_PARANOID);

include('vcf_extras_splunk.inc');

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

var constraints = [
  { 'fixed_version' : '9.0', 'license': 'Forwarder' }
];

vcf::splunk::check_version_and_report(app_info:app_info, constraints:constraints, severity:SECURITY_WARNING);