The RPC component in Windows 2000, Windows NT 4.0, and Windows XP allows remote attackers to cause a denial of service (disabled RPC service) via a malformed packet to the RPC Endpoint Mapper at TCP port 135, which triggers a null pointer dereference.
Integer overflow in JsArrayFunctionHeapSort function used by Windows Script Engine for JScript (JScript.dll) on various Windows operating system allows remote attackers to execute arbitrary code via a malicious web page or HTML e-mail that uses a large array index value that enables a heap-based buffer overflow attack.
Cross-site scripting (XSS) vulnerability in Help and Support Center for Microsoft Windows Me allows remote attackers to execute arbitrary script in the Local Computer security context via an hcp:// URL with the malicious script in the topic parameter.
Buffer overflow in the RPC Locator service for Microsoft Windows NT 4.0, Windows NT 4.0 Terminal Server Edition, Windows 2000, and Windows XP allows local users to execute arbitrary code via an RPC call to the service containing certain parameter information.
Microsoft Windows XP Professional upgrade edition overwrites previously installed patches for Internet Explorer 6.0, leaving Internet Explorer unpatched.
Microsoft Windows XP and Windows 2000, when configured to send administrative alerts and the "Do not overwrite events (clear log manually)" option is set, does not notify the administrator when the log reaches its maximum size, which allows local users and remote attackers to avoid detection.
The screensaver on Windows NT 4.0, 2000, XP, and 2002 does not verify if a domain account has already been locked when a valid password is provided, which makes it easier for users with physical access to conduct brute force password guessing.