Microsoft today shipped a one-click fix-it workaround to help users avoid malicious hacker attacks. The fix-it package effectively disables SMBv2 and then stops and starts the Server service. It provides temporary mitigation from remote code execution attacks targeting the known and still unpatched vulnerability. Microsoft cautioned that disabling SMB v2 may slow down SMB connections between Windows Vista and Windows Server 2008 machines. The company also confirmed that the exploit code released into Immunity s Canvas pen-testing platform works as advertised.
Source: https://threatpost.com/microsoft-ships-temporary-fix-it-critical-vista-flaw-092309/72219/