This indicates an attack attempt against a Denial of Service vulnerability in Microsoft Secure Channel (Schannel) security package.
The vulnerability is caused by an error when the vulnerable software handles specially crafted packets. A remote attacker A remote attacker may be able to exploit this to cause a denial of service condition on the affected system, by sending specially crafted packets to the target machine.
Microsoft Windows 7
Microsoft Windows 8
Microsoft Windows 8.1
Microsoft Windows RT
Microsoft Windows RT 8.1
Microsoft Windows Vista
Microsoft Windows Server 2003
Microsoft Windows Server 2008
Microsoft Windows Server 2008 R2
Microsoft Windows Server 2012
Microsoft Windows Server 2012 R2
Denial of Service: Remote attackers can crash vulnerable systems.
Apply the most recent upgrade or patch from the vendor.