Vigil@nce: MySQL, denial of service via bit-string
September 2008 by Vigil@nce
A local attacker can use an invalid bit-string query in order to stop MySQL.
Consequences: denial of service of service
Provenance: user account
Means of attack: 1 attack
Ability of attacker: technician (2/4)
Confidence: confirmed by the editor (5/5)
Diffusion of the vulnerable configuration: high (3/3)
Creation date: 10/09/2008
MySQL Community Server [confidential versions]
MySQL Enterprise Server [confidential versions]
A SQL query can contain a bit-string (number represented as a string of bits): SELECT * FROM table WHERE v=b’10101’; Hexadecimal values can also be represented as strings: SELECT * FROM table WHERE v=x’1234567890abcdef’; SELECT * FROM table WHERE v=X’1234567890ABCDEF’;
However, if the indicated string is empty (b’’), a logic error occurs and stops MySQL.
An attacker allowed to send queries can therefore create a denial of service.
Identifiers: 35658, BID-31081, CVE-2008-3963, VIGILANCE-VUL-8103