This indicates an attack attempt to exploit a Denial of Service vulnerability in OpenSSL.
The vulnerability is due to an error in the application when it handles maliciously crafted SSL/TLS messages. A remote attacker can exploit this to cause memory leakage leading to a denial of service condition.
OpenSSL prior to 1.0.1j
OpenSSL prior to 1.0.0o
OpenSSL prior to 0.9.8zc
Denial of Service: Remote attackers can crash vulnerable systems
Apply the most recent upgrade or patch from the vendor.