mysql is vulnerable to denial of service. A flaw in the way MySQL processed statements that assign a value to a user-defined variable and that also contain a logical value evaluation could allow a remote, authenticated attacker to crash mysqld.
bugs.mysql.com/bug.php?id=55564
dev.mysql.com/doc/refman/5.1/en/news-5-1-51.html
dev.mysql.com/doc/refman/5.1/en/news-5-1-52.html
dev.mysql.com/doc/refman/5.5/en/news-5-5-6.html
lists.apple.com/archives/security-announce/2011//Jun/msg00000.html
secunia.com/advisories/42875
secunia.com/advisories/42936
support.apple.com/kb/HT4723
www.debian.org/security/2011/dsa-2143
www.mandriva.com/security/advisories?name=MDVSA-2010:222
www.mandriva.com/security/advisories?name=MDVSA-2010:223
www.redhat.com/support/errata/RHSA-2010-0825.html
www.redhat.com/support/errata/RHSA-2011-0164.html
www.securityfocus.com/bid/43676
www.turbolinux.co.jp/security/2011/TLSA-2011-3j.txt
www.ubuntu.com/usn/USN-1017-1
www.ubuntu.com/usn/USN-1397-1
www.vupen.com/english/advisories/2011/0105
www.vupen.com/english/advisories/2011/0170
www.vupen.com/english/advisories/2011/0345
access.redhat.com/errata/RHSA-2011:0164
access.redhat.com/security/updates/classification/#moderate
bugzilla.redhat.com/show_bug.cgi?id=640819
exchange.xforce.ibmcloud.com/vulnerabilities/64843