This indicates an attack attempt against a Denial Of Service vulnerability in OpenSSL.
The vulnerability is due to an error in the application when reassembling crafted DTLS messages. A remote attacker can exploit this to cause a denial-of-service condition via crafted packets.
OpenSSL Project OpenSSL prior to 1.0.1i
Denial of Service: Remote attackers can crash vulnerable systems.
Apply the most recent upgrade or patch from the vendor