This indicates an attack attempt to exploit a Buffer Overflow vulnerability in the MySQL yaSSL module.
The vulnerability is due to improper handling of specially crafted packets, which could lead to the execution of arbitrary code or a Denial of Service.
MySQL yaSSL version 1.7.5 and earlier.
System Compromise: Remote attackers can gain control of vulnerable systems.
Denial of Service: Remote attackers can crash vulnerable systems.
Allow access by trusted users only to SSL servers using yaSSL.