PostgreSQL 14.x < 14.12 / 15.x < 15.7 / 16.x < 16.3 Missing Authorization Check

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# Portions Copyright (C) 1996-2019, The PostgreSQL Global Development Group
# Portions Copyright (C) 1994, The Regents of the University of California
# Permission to use, copy, modify, and distribute this software and its documentation for any purpose, without fee, and without a written agreement is hereby granted, provided that the above copyright notice and this paragraph and the following two paragraphs appear in all copies.
# IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING LOST PROFITS, ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE UNIVERSITY OF CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
# THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATIONS TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
##

include('compat.inc');

if (description)
{
  script_id(197741);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/05/24");

  script_cve_id("CVE-2024-4317");
  script_xref(name:"IAVB", value:"2024-B-0062");

  script_name(english:"PostgreSQL 14.x < 14.12 / 15.x < 15.7 / 16.x < 16.3 Missing Authorization Check");

  script_set_attribute(attribute:"synopsis", value:
"The remote database server is affected by a vulnerability");
  script_set_attribute(attribute:"description", value:
"The version of PostgreSQL installed on the remote host is 14 prior to 14.12, 15 prior to 15.7, or 16 prior to 16.3. As
such, it is potentially affected by a vulnerability :

  - Missing authorization in PostgreSQL built-in views pg_stats_ext and pg_stats_ext_exprs allows an 
    unprivileged database user to read most common values and other statistics from CREATE STATISTICS 
    commands of other users. The most common values may reveal column values the eavesdropper could not 
    otherwise read or results of functions they cannot execute. Installing an unaffected version only fixes 
    fresh PostgreSQL installations, namely those that are created with the initdb utility after installing 
    that version. Current PostgreSQL installations will remain vulnerable until they follow the instructions 
    in the release notes. Within major versions 14-16, minor versions before PostgreSQL 16.3, 15.7, and 
    14.12 are affected. Versions before PostgreSQL 14 are unaffected. (CVE-2024-4317)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  # https://www.postgresql.org/about/news/postgresql-163-157-1412-1315-and-1219-released-2858/
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?07fc5d58");
  # https://www.postgresql.org/support/security/CVE-2024-4317/
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?1940556a");
  script_set_attribute(attribute:"solution", value:
"Upgrade to PostgreSQL 14.12 / 15.7 / 16.3 or later");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:H/Au:S/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:L/UI:N/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-2024-4317");

  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:"2024/05/09");
  script_set_attribute(attribute:"patch_publication_date", value:"2024/05/09");
  script_set_attribute(attribute:"plugin_publication_date", value:"2024/05/23");

  script_set_attribute(attribute:"plugin_type", value:"combined");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:postgresql:postgresql");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Databases");

  script_copyright(english:"This script is Copyright (C) 2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("postgres_installed_windows.nbin", "postgres_installed_nix.nbin", "postgresql_version.nbin");
  script_require_ports("Services/postgresql", 5432, "installed_sw/PostgreSQL", "Settings/ParanoidReport");

  exit(0);
}

include('vcf_extras_postgresql.inc');

var app = 'PostgreSQL';
var win_local = TRUE;

if (!get_kb_item('SMB/Registry/Enumerated'))
  win_local = FALSE;

var port = get_service(svc:'postgresql', default:5432);
var kb_base = 'database/' + port + '/postgresql/';
var kb_ver = NULL;
var kb_path = kb_base + 'version';
var ver = get_kb_item(kb_path);
if (!empty_or_null(ver)) kb_ver = kb_path;

var app_info = vcf::postgresql::get_app_info(app:app, port:port, kb_ver:kb_ver, kb_base:kb_base, win_local:win_local);
vcf::check_granularity(app_info:app_info, sig_segments:2);

var constraints = [
  { 'min_version' : '14', 'fixed_version' : '14.12' },
  { 'min_version' : '15', 'fixed_version' : '15.7' },
  { 'min_version' : '16', 'fixed_version' : '16.3' }
];

vcf::postgresql::check_version_and_report(app_info:app_info, constraints:constraints, severity:SECURITY_NOTE);