CVE-2012-1734
Unspecified vulnerability in Oracle MySQL Server 5.1.62 and earlier, and 5.5.23 and earlier, allows remote authenticated users to affect availability via unknown vectors related to Server Optimizer.
Date published : 2012-07-17
http://www.securityfocus.com/bid/54540
http://www.oracle.com/technetwork/topics/security/cpujul2012-392727.html