Vulnerable Systems:
*.Windows Vista Service Pack 2 and prior
* Windows Server 2008 for 32-bit Systems SP2 and prior
* Windows 7 for x64-based Systems and prior
* Windows Server 2008 R2 for Itanium-based Systems and prior
* Windows 8 for 64-bit Systems and prior
* Windows Server 2012
* Windows RT
The issue is triggered when an unspecified error occurs. With specially crafted SSL or TSL traffic, a man-in-the-middle attacker can downgrade SSL to version 2, weakening security.