Several vulnerabilities have been discovered in the MySQL database server.
Lukasz Wojtow discovered a potential buffer overflow in the function mysql_real_connect(). A malicious name server could send specially crafted DNS packages which might result in execution of arbitrary code with the database server’s privileges. However, it is believed that this bug cannot be exploited with the C Standard library (glibc) that Ubuntu uses. (CAN-2004-0836).
25 November 2004
A security issue affects these releases of Ubuntu and its derivatives:
Several vulnerabilities have been discovered in the MySQL database server.
Lukasz Wojtow discovered a potential buffer overflow in the function mysql_real_connect(). A malicious name server could send specially crafted DNS packages which might result in execution of arbitrary code with the database server’s privileges. However, it is believed that this bug cannot be exploited with the C Standard library (glibc) that Ubuntu uses. (CAN-2004-0836).
Dean Ellis noticed a flaw that allows an authorized MySQL user to cause a denial of service (crash or hang) via concurrent execution of certain statements (ALTER TABLE … UNION=, FLUSH TABLES) on tables of type MERGE (CAN-2004-0837)
Some query strings containing a double quote (like MATCH … AGAINST (’ some “ query’ IN BOOLEAN MODE) ) that did not have a matching closing double quote caused a denial of service (server crash). Again, this is only exploitable by authorized mysql users. (CAN-2004-0956)
If a user was granted privileges to a database with a name containing an underscore (”_“), the user also gained the ability to grant privileges to other databases with similar names. (CAN-2004-0957)
The problem can be corrected by updating your system to the following package versions:
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
Vulmon