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nessusThis script is Copyright (C) 2020-2023 and is owned by Tenable, Inc. or an Affiliate thereof.MYSQL_CVE-2020-14567.NASL
HistoryJul 16, 2020 - 12:00 a.m.

MySQL Denial of Service (Jul 2020 CPU)

2020-07-1600:00:00
This script is Copyright (C) 2020-2023 and is owned by Tenable, Inc. or an Affiliate thereof.
www.tenable.com
39
mysql
denial of service
vulnerability
remote host
oracle mysql
network access
high privileged attacker
dos
nessus

CVSS2

4

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

SINGLE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:L/Au:S/C:N/I:N/A:P

CVSS3

4.9

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

AI Score

5.5

Confidence

High

EPSS

0.001

Percentile

35.3%

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.

#
# (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);

CVSS2

4

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

SINGLE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:L/Au:S/C:N/I:N/A:P

CVSS3

4.9

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

AI Score

5.5

Confidence

High

EPSS

0.001

Percentile

35.3%