PostgreSQL < 9.5.23, 9.6.x < 9.6.19, 10.x < 10.14, 11.x < 11.9, 12.x < 12.4 Search Path Vulnerability - Linux

# SPDX-FileCopyrightText: 2020 Greenbone AG
# Some text descriptions might be excerpted from (a) referenced
# source(s), and are Copyright (C) by the respective right holder(s).
#
# SPDX-License-Identifier: GPL-2.0-only

CPE = "cpe:/a:postgresql:postgresql";

if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.144709");
  script_version("2024-07-19T05:05:32+0000");
  script_tag(name:"last_modification", value:"2024-07-19 05:05:32 +0000 (Fri, 19 Jul 2024)");
  script_tag(name:"creation_date", value:"2020-10-07 07:08:37 +0000 (Wed, 07 Oct 2020)");
  script_tag(name:"cvss_base", value:"4.4");
  script_tag(name:"cvss_base_vector", value:"AV:L/AC:M/Au:N/C:P/I:P/A:P");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2020-09-18 12:15:00 +0000 (Fri, 18 Sep 2020)");

  script_cve_id("CVE-2020-14350");

  script_tag(name:"qod_type", value:"remote_banner_unreliable");

  script_tag(name:"solution_type", value:"VendorFix");

  script_name("PostgreSQL < 9.5.23, 9.6.x < 9.6.19, 10.x < 10.14, 11.x < 11.9, 12.x < 12.4 Search Path Vulnerability - Linux");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2020 Greenbone AG");
  script_family("Databases");
  script_dependencies("gb_postgresql_consolidation.nasl", "os_detection.nasl");
  script_mandatory_keys("postgresql/detected", "Host/runs_unixoide");

  script_tag(name:"summary", value:"PostgreSQL is prone to an uncontrolled search path element vulnerability in
  CREATE EXTENSION.");

  script_tag(name:"vuldetect", value:"Checks if a vulnerable version is present on the target host.");

  script_tag(name:"impact", value:"When a superuser runs certain CREATE EXTENSION statements, users may be able to
  execute arbitrary SQL functions under the identity of that superuser. The attacker must have permission to
  create objects in the new extension's schema or a schema of a prerequisite extension. Not all extensions are
  vulnerable.");

  script_tag(name:"affected", value:"PostgreSQL versions prior to 9.5.23, 9.6.x prior to 9.6.19, 10.x prior to
  10.14, 11.x prior to 11.9 and 12.x prior to 12.4.");

  script_tag(name:"solution", value:"Update to version 9.5.23, 9.6.19, 10.14, 11.9, 12.4 or later.");

  script_xref(name:"URL", value:"https://www.postgresql.org/about/news/postgresql-124-119-1014-9619-9523-and-13-beta-3-released-2060/");

  exit(0);
}

include("host_details.inc");
include("version_func.inc");

if (isnull(port = get_app_port(cpe: CPE)))
  exit(0);

if (!infos = get_app_version_and_location(cpe: CPE, port: port, exit_no_version: TRUE))
  exit(0);

version = infos["version"];
location = infos["location"];

if (version_is_less(version: version, test_version: "9.5.23")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "9.5.23", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

if (version_in_range(version: version, test_version: "9.6.0", test_version2: "9.6.18")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "9.6.19", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

if (version_in_range(version: version, test_version: "10.0", test_version2: "10.13")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "10.14", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

if (version_in_range(version: version, test_version: "11.0", test_version2: "11.8")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "11.9", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

if (version_in_range(version: version, test_version: "12.0", test_version2: "12.3")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "12.4", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

exit(99);