MariaDB 10.1.x < 10.1.5 wait_for_workers_idle() Function Worker Thread Handling DoS

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

include("compat.inc");

if (description)
{
  script_id(84797);
  script_version("1.8");
  script_cvs_date("Date: 2018/11/15 20:50:21");


  script_name(english:"MariaDB 10.1.x < 10.1.5 wait_for_workers_idle() Function Worker Thread Handling DoS");
  script_summary(english:"Checks the MariaDB version.");

  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 MariaDB running on the remote host is 10.1.x prior to
10.1.5. It is, therefore, affected by a denial of service
vulnerability due to a flaw in the wait_for_workers_idle() function 
that occurs when handling worker threads. An authenticated, remote
attacker can exploit this to crash the database.");
  script_set_attribute(attribute:"see_also", value:"https://mariadb.org/mariadb-10-1-5-now-available/");
  script_set_attribute(attribute:"see_also", value:"https://mariadb.atlassian.net/browse/MDEV-8147");
  script_set_attribute(attribute:"solution", value:"Upgrade to MariaDB version 10.1.5 or later.");
  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_attribute(attribute:"vuln_publication_date", value:"2015/05/12");
  script_set_attribute(attribute:"patch_publication_date", value:"2015/06/04");
  script_set_attribute(attribute:"plugin_publication_date", value:"2015/07/16");

  script_set_attribute(attribute:"potential_vulnerability", value:"true");
  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:mariadb:mariadb");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2015-2018 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("mysql_version.nasl", "mysql_login.nasl");
  script_require_keys("Settings/ParanoidReport");
  script_require_ports("Services/mysql", 3306);

  exit(0);
}

include("mysql_version.inc");

mysql_check_version(variant:'MariaDB', fixed:'10.1.5-MariaDB', min:'10.1', severity:SECURITY_WARNING);