sys/ssl/SslSocket.cpp in qpidd in Apache Qpid, as used in Red Hat Enterprise MRG before 1.2.2 and other products, when SSL is enabled, allows remote attackers to cause a denial of service (daemon outage) by connecting to the SSL port but not participating in an SSL handshake.
https://bugzilla.redhat.com/show_bug.cgi?id=632657
http://www.redhat.com/support/errata/RHSA-2010-0757.html
http://www.redhat.com/support/errata/RHSA-2010-0756.html