This indicates an attack attempt against a Denial of Service Vulnerability in GnuTLS.
The vulnerability is caused by an error when vulnerable application handles a handshake message with the large OCSP Status Request extension. A remote attacker may be able to exploit this to cause a denial of service condition on affected systems.
GnuTLS prior to 3.5.13
Denial of Service: Remote attackers can crash vulnerable systems.
Apply the most recent upgrade or patch from the vendor.