This indicates an attack attempt against a Buffer Overflow vulnerability in OpenSSL.
The vulnerability is caused by an error when the vulnerable application handles a maliciously crafted TLS certificate record. A remote attacker may be able to exploit this to cause a denial of service condition or execute arbitrary code on affected systems.
OpenSSL Project OpenSSL prior to 1.0.2l-git
OpenSSL Project OpenSSL prior to 1.1.0f-git
System Compromise: Remote attackers can gain control of vulnerable systems.
Apply the most recent upgrade or patch from the vendor.