A memory leak flaw was found in the way the dtls1_buffer_record() function of OpenSSL parsed certain DTLS messages. A remote attacker could send multiple specially crafted DTLS messages to exhaust all available memory of a DTLS server.
OpenSSL released security advisory  which fixes the below issue:
A memory leak can occur in the dtls1_buffer_record function under certain
conditions. In particular this could occur if an attacker sent repeated DTLS
records with the same sequence number but for the next epoch. The memory leak
could be exploited by an attacker in a Denial of Service attack through memory
Upstream commit that looks to fix the problem:
Created openssl tracking bugs for this issue:
Affects: fedora-all [bug 1181013]
openssl-1.0.1k-1.fc21 has been pushed to the Fedora 21 stable repository. If problems still persist, please make note of it in this bug report.
This issue does not affect the version of openssl and openssl097a as shipped with Red Hat Enterprise Linux 5. This issue does not affect the version of openssl098e as shipped with Red Hat Enterprise Linux 6 and 7.
openssl-1.0.1e-41.fc20 has been pushed to the Fedora 20 stable repository. If problems still persist, please make note of it in this bug report.
This issue has been addressed in the following products:
Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Via RHSA-2015:0066 https://rhn.redhat.com/errata/RHSA-2015-0066.html