MySQL is vulnerable to denial of service (DoS). It allows remote authenticated users to affect availability via unknown vectors related to Server Optimizer.
dev.mysql.com/doc/refman/5.1/en/news-5-1-62.html
dev.mysql.com/doc/refman/5.1/en/news-5-1-63.html
dev.mysql.com/doc/refman/5.1/en/news-5-1-64.html
dev.mysql.com/doc/refman/5.1/en/news-5-1-65.html
dev.mysql.com/doc/refman/5.1/en/news-5-1-66.html
osvdb.org/83979
rhn.redhat.com/errata/RHSA-2012-1462.html
secunia.com/advisories/51309
secunia.com/advisories/53372
security.gentoo.org/glsa/glsa-201308-06.xml
www.mandriva.com/security/advisories?name=MDVSA-2013:150
www.oracle.com/technetwork/topics/security/cpuapr2012-366314.html#AppendixMSQL
www.oracle.com/technetwork/topics/security/cpujul2012-392727.html
www.oracle.com/technetwork/topics/security/cpujul2012-392727.html#AppendixMSQL
www.oracle.com/technetwork/topics/security/cpuoct2012-1515893.html#AppendixMSQL
www.securityfocus.com/bid/54540
www.securitytracker.com/id?1027263
access.redhat.com/security/updates/classification/#important
exchange.xforce.ibmcloud.com/vulnerabilities/77064
rhn.redhat.com/errata/RHSA-2012-1462.html