mysql50-server -- COM_TABLE_DUMP arbitrary code execution

Stefano Di Paola reports:

An authenticated user could remotely execute arbitrary
commands by taking advantage of a stack overflow.
To take advantage of these flaws an attacker should have
direct access to MySQL server communication layer (port
3306 or unix socket). But if used in conjuction with some
web application flaws (i.e. php code injection) an
attacker could use socket programming (i.e. php sockets)
to gain access to that layer.