MySQL Denial of Service (Jul 2020 CPU)

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

include('compat.inc');

if (description)
{
  script_id(138561);
  script_version("1.6");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/11/01");

  script_cve_id("CVE-2020-14567");
  script_xref(name:"IAVA", value:"2020-A-0321-S");

  script_name(english:"MySQL Denial of Service (Jul 2020 CPU)");

  script_set_attribute(attribute:"synopsis", value:
"The remote database server is affected by a denial of service vulnerability.");
  script_set_attribute(attribute:"description", value:
"The version of MySQL running on the remote host is 5.7.29 and prior or 8.0.19 and prior. It is, therefore, affected by
a vulnerability, as noted in the July 2020 Critical Patch Update advisory:

A Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Replication). Supported
versions that are affected are 5.7.29 and prior and 8.0.19 and prior. Easily exploitable vulnerability allows high
privileged attacker with network access via multiple protocols to compromise MySQL Server. Successful attacks
of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash
(complete DOS) of MySQL Server.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
  # https://www.oracle.com/security-alerts/cpujul2020.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?dc7b9bd1");
  script_set_attribute(attribute:"solution", value:
"Refer to the vendor advisory.");
  script_set_attribute(attribute:"agent", value:"all");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:N/I:N/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:H/UI:N/S:U/C:N/I:N/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-2020-14567");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/07/14");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/07/14");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/07/16");

  script_set_attribute(attribute:"plugin_type", value:"combined");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:oracle:mysql");
  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) 2020-2023 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("mysql_version.nasl", "mysql_login.nasl", "mysql_version_local.nasl", "mysql_win_installed.nbin", "macosx_mysql_installed.nbin");
  script_require_keys("installed_sw/MySQL Server");

  exit(0);
}

include('vcf_extras_mysql.inc');

var app_info = vcf::mysql::combined_get_app_info();

var constraints = [
  { 'min_version' : '5.0.0', 'fixed_version' : '5.7.30'},
  { 'min_version' : '8.0.0', 'fixed_version' : '8.0.20'}
];

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