This indicates an attack attempt against an Integer Underflow Vulnerability in OpenSSL.
The vulnerability is caused by an error when vulnerable application is handling a CBC ciphersuites on platforms that support the AES-NI instruction set. It allows a remote attacker to cause a denial-of-service condition via a crafted TLS Encrypted Handshake Message.
OpenSSL Project OpenSSL 1.0.0x prior to 1.0.0k
OpenSSL Project OpenSSL 1.0.1x prior to 1.0.0d
OpenSSL Project OpenSSL 0.9.8x prior to 0.9.8y
Denial of Service: Remote attackers can crash vulnerable systems.
Refer to the vendor's website for suggested workaround.