Some security issues have been reported in MySQL, where one has unknown impacts while others can be exploited by malicious users to cause a DoS (Denial of Service).

1) An error within the handling of DDL statements after having changed the "innodb_file_per_table" or "innodb_file_format" configuration parameters can be exploited to crash the server.

2) An error when handling joins involving a unique "SET" column can be exploited to crash the server.

3) An error when handling NULL arguments passed to "IN()" or "CASE" operations can be exploited to crash the server.

4) An error when processing certain malformed arguments passed to the "BINLOG" statement can be exploited to crash the server.

5) An error when processing "TEMPORARY" InnoDB tables featuring nullable columns can be exploited to crash the server.

6) An error when performing alternating reads from two indexes on tables using the "HANDLER" interface can be exploited to crash the server.

7) An error when handling "EXPLAIN" statements on certain queries can be exploited to crash the server.

8) An error when handling "LOAD DATA INFILE" statements can lead to the return of an "OK" packet although errors have been encountered.

Solution
Update to version 5.1.49.

Provided and/or discovered by
Reported in MySQL bug reports by:
1, 8) Elena Stepanova
2, 3, 4) Shane Bester
5) Boris Reisig
6) Matthias Leich
7) Bjorn Munch

Changelog
Further details available in Customer Area

Original Advisory
http://dev.mysql.com/doc/refman/5.1/en/news-5-1-49.html

Deep Links
Links available in Customer Area