PostgreSQL 14.x < 14.21 / 15.x < 15.16 / 16.x < 16.12 / 17.x < 17.8 / 18.x < 18.2 Multiple Vulnerabilities

#%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(299758);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/02/24");

  script_cve_id(
    "CVE-2026-2003",
    "CVE-2026-2004",
    "CVE-2026-2005",
    "CVE-2026-2006"
  );
  script_xref(name:"IAVB", value:"2026-B-0047");

  script_name(english:"PostgreSQL 14.x < 14.21 / 15.x < 15.16 / 16.x < 16.12 / 17.x < 17.8 / 18.x < 18.2 Multiple Vulnerabilities");

  script_set_attribute(attribute:"synopsis", value:
"The remote database server is affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The version of PostgreSQL installed on the remote host is 14 prior to 14.21, 15 prior to 15.16, 16 prior to 16.12, 17
prior to 17.8, or 18 prior to 18.2. As such, it is potentially affected by multiple vulnerabilities:

  - Missing validation of multibyte character length in PostgreSQL text manipulation allows a database user to
    issue crafted queries that achieve a buffer overrun. That suffices to execute arbitrary code as the
    operating system user running the database. Versions before PostgreSQL 18.2, 17.8, 16.12, 15.16, and
    14.21 are affected. (CVE-2026-2006)

  - Heap buffer overflow in PostgreSQL pgcrypto allows a ciphertext provider to execute arbitrary code as the
    operating system user running the database. Versions before PostgreSQL 18.2, 17.8, 16.12, 15.16, and
    14.21 are affected. (CVE-2026-2005)

  - Missing validation of type of input in PostgreSQL intarray extension selectivity estimator function allows
    an object creator to execute arbitrary code as the operating system user running the database. Versions
    before PostgreSQL 18.2, 17.8, 16.12, 15.16, and 14.21 are affected. (CVE-2026-2004)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
  # https://www.postgresql.org/about/news/postgresql-182-178-1612-1516-and-1421-released-3235/
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?fbf9397e");
  script_set_attribute(attribute:"see_also", value:"https://www.postgresql.org/support/security/CVE-2026-2003/");
  script_set_attribute(attribute:"see_also", value:"https://www.postgresql.org/support/security/CVE-2026-2004/");
  script_set_attribute(attribute:"see_also", value:"https://www.postgresql.org/support/security/CVE-2026-2005/");
  script_set_attribute(attribute:"see_also", value:"https://www.postgresql.org/support/security/CVE-2026-2006/");
  script_set_attribute(attribute:"solution", value:
"Upgrade to PostgreSQL 14.21 / 15.16 / 16.12 / 17.8 / 18.2 or later.");
  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:N/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-2026-2006");

  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:"2026/02/12");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/02/12");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/02/23");

  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_set_attribute(attribute:"thorough_tests", value:"true");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2026 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");

  exit(0);
}

include('vcf_extras_postgresql.inc');

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:'PostgreSQL', 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' : '14.21' },
  { 'min_version' : '15', 'fixed_version' : '15.16' },
  { 'min_version' : '16', 'fixed_version' : '16.12' },
  { 'min_version' : '17', 'fixed_version' : '17.8' },
  { 'min_version' : '18', 'fixed_version' : '18.2' }
];

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