MySQL Community Server 5.0 < 5.0.51 RENAME TABLE Symlink System Table Overwrite

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

include("compat.inc");

if (description)
{
  script_id(29251);
  script_version("1.18");
  script_cvs_date("Date: 2018/11/15 20:50:21");

  script_cve_id("CVE-2007-5969");
  script_bugtraq_id(26765);

  script_name(english:"MySQL Community Server 5.0 < 5.0.51 RENAME TABLE Symlink System Table Overwrite");
  script_summary(english:"Checks version of MySQL Community Server");

  script_set_attribute(attribute:"synopsis", value:
"The remote database server is susceptible to a local symlink attack.");
  script_set_attribute(attribute:"description", value:
"The version of MySQL Community Server installed on the remote host
reportedly fails to check whether a file to which a symlink points
exists when using RENAME TABLE against a table with explicit DATA
DIRECTORY and INDEX DIRECTORY options.  A local attacker may be able
to leverage this issue to overwrite system table information by
replacing the file to which the symlink points.");
  script_set_attribute(attribute:"see_also", value:"http://dev.mysql.com/doc/refman/5.0/en/news-5-0-51.html");
  script_set_attribute(attribute:"see_also", value:"https://forums.mysql.com/read.php?3,186931,186931");
  script_set_attribute(attribute:"solution", value:
"Upgrade to MySQL Community Server version 5.0.51 or later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:H/Au:S/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_cwe_id(264);

  script_set_attribute(attribute:"plugin_publication_date", value:"2007/12/10");

  script_set_attribute(attribute:"plugin_type", value: "remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:mysql:mysql");
  script_end_attributes();
 
  script_category(ACT_GATHER_INFO);
  script_family(english:"Databases");

  script_copyright(english:"This script is Copyright (C) 2007-2018 and is owned by Tenable, Inc. or an Affiliate thereof.");

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

  exit(0);
}


include("global_settings.inc");
include("misc_func.inc");
include("mysql_func.inc");


# nb: banner checks of open source software are prone to false-
#     positives so only run the check if reporting is paranoid.
if (report_paranoia < 2)
  exit(1, "This plugin only runs if 'Report paranoia' is set to 'Paranoid'.");

port = get_service(svc:"mysql", default:3306, exit_on_fail:TRUE);

if (mysql_init(port:port, exit_on_fail:TRUE) == 1)
{
  variant = mysql_get_variant();
  ver = mysql_get_version();

  if ("Community" >< variant && ver =~ "^5\.0\.([0-9]|[1-4][0-9]|50)($|[^0-9])")
  {
    report = 'The remote MySQL Community Server\'s version is :\n\n  '+ver+'\n';
    datadir = get_kb_item('mysql/' + port + '/datadir');
    if (!empty_or_null(datadir))
    {
      report += '  Data Dir          : ' + datadir + '\n';
    }
    databases = get_kb_item('mysql/' + port + '/databases');
    if (!empty_or_null(databases))
    { 
      report += '  Databases         :\n' + databases;
    }
    security_hole(port:port, extra:report);
  }
}
mysql_close();