[原文]The local and remote desktop login screens in Microsoft Windows XP before SP2 and 2003 allow remote attackers to cause a denial of service (CPU and memory consumption) by repeatedly using the WinKey+"U" key combination, which causes multiple copies of Windows Utility Manager to be loaded more quickly than they can be closed when the copies detect that another instance is running.
Microsoft Windows XP/2003 Login Screen Consumption DoS
Physical Access Required,
Remote / Network Access
Denial of Service
Loss of Availability
Microsoft Windows contains a flaw that may allow an attacker to cause the system to hard lock. The issue is triggered when the WinKey and the "U" are held down at the login screen. The system does not properly handle the input causing the system to slow down and eventually use CPU and/or memory before locking up. If the "remote desktop" feature is enabled, this can be used to affect a system remotely.
Upgrade to version XP SP2 or higher, as it has been reported to fix this vulnerability. An upgrade is required as there are no known workarounds.