PostgreSQL 9.2.x < 9.2.22 / 9.3.x < 9.3.18 / 9.4.x < 9.4.13 / 9.5.x < 9.5.8 / 9.6.x < 9.6.4 Multiple Vulnerabilities

#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc
#

include('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(102527);
  script_version("1.18");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/04/04");

  script_cve_id("CVE-2017-7546", "CVE-2017-7547", "CVE-2017-7548");

  script_name(english:"PostgreSQL 9.2.x < 9.2.22 / 9.3.x < 9.3.18 / 9.4.x < 9.4.13 / 9.5.x < 9.5.8 / 9.6.x < 9.6.4 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 9.2.x prior
to 9.2.22, 9.3.x prior to 9.3.18, 9.4.x prior to 9.4.13, 9.5.x prior
to 9.5.8, or 9.6.x prior to 9.6.4. It is, therefore, affected by
multiple vulnerabilities :

  - An authentication bypass flaw exists in that an empty password is
    accepted in some authentication methods. (CVE-2017-7546)

  - An information disclosure vulnerability exists in the
    'pg_user_mappings' catalog view that can disclose passwords to
    users lacking server privileges. (CVE-2017-7547)

    Note: The 'pg_user_mappings' update will only fix the behavior in
    newly created clusters utilizing initdb. To fix this issue on
    existing systems you will need to follow the steps in the release
    notes.

  - A flaw exists in the lo_put() function due to improper checking of
    permissions that leads to ignoring of ACLs. (CVE-2017-7548)");
  script_set_attribute(attribute:"see_also", value:"https://www.postgresql.org/about/news/1772/");
  script_set_attribute(attribute:"see_also", value:"https://www.postgresql.org/docs/current/static/release-9-2-22.html");
  script_set_attribute(attribute:"see_also", value:"https://www.postgresql.org/docs/current/release-9-3-18.html");
  script_set_attribute(attribute:"see_also", value:"https://www.postgresql.org/docs/current/release-9-4-13.html");
  script_set_attribute(attribute:"see_also", value:"https://www.postgresql.org/docs/current/release-9-5-8.html");
  script_set_attribute(attribute:"see_also", value:"https://www.postgresql.org/docs/current/release-9-6-4.html");
  script_set_attribute(attribute:"solution", value:
"Upgrade to PostgreSQL version 9.2.22 / 9.3.18 / 9.4.13 / 9.5.8 / 9.6.4
or later.");
  script_set_attribute(attribute:"agent", value:"all");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  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: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-2017-7546");

  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:"2017/08/10");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/08/10");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/08/16");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:postgresql:postgresql");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2017-2023 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 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;

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);

#  9.2.22 / 9.3.18 / 9.4.13 / 9.5.8 / 9.6.4
constraints = [
  { "min_version" : "9.2", "fixed_version" : "9.2.22" },
  { "min_version" : "9.3", "fixed_version" : "9.3.18" },
  { "min_version" : "9.4", "fixed_version" : "9.4.13" },
  { "min_version" : "9.5", "fixed_version" : "9.5.8" },
  { "min_version" : "9.6", "fixed_version" : "9.6.4" }
];

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