Free windows denial of service software for windows

There is a denial of service vulnerability in WebTV for Windows that may allow a malicious user to remotely crash either the WebTV for Windows application and/or the computer system running WebTV for Windows. Restarting the application and/or system will return the system to its normal state.Although the WebTV for Windows application ships with Windows 98/98SE, the application is not installed by default, and customers who have not installed it would not be at risk.Note: This vulnerability is not related to the WebTV? service provided by WebTV Networks. WebTV is a service that provides Internet services to users via their television. WebTV for Windows is an unrelated product that enables users to view TV programs on their computer.

Windows NT NNTP Denial of Service Vulnerability Patch MS01-043 has come as a smart tool to remove a denial of service vulnerability in Windows NT 4.0 computers running the Network News Transfer Protocol (NNTP) service. This denial of service vulnerability exists because the NNTP service in computers running Windows NT 4.0 contains a memory leak. If a malicious user sends a large amount of specially malformed data to an affected server, it can deplete the memory that is available to the server, which can cause the server to stop performing.

Windows 2000 LPC Vulnerability Patch is a highly-efficient, high-quality patch which eliminates several security vulnerabilities that could allow a range of effects, from denial of service attacks to, in some cases, privilege elevation. Several vulnerabilities have been identified in the Windows NT 4.0 and Windows 2000 implementations of LPC and LPC ports:

• The Invalid LPC Request vulnerability, which affects only Windows NT 4.0. By levying an invalid LPC request, it would be possible to make the affected system fail.
• The LPC Memory Exhaustion vulnerability, which affects both Windows NT 4.0 and Windows 2000. By levying spurious LPC requests, it could be possible to increase the number of queued LPC messages to the point where kernel memory was depleted.
• The Predictable LPC Message Identifier vulnerability, which affects both Windows NT 4.0 and Windows 2000. Any process that knows the identifier of an LPC message can access it; however, the identifiers can be predicted. In the simplest case, a malicious user could access other process LPC ports and feed them random data as a denial of service attack. In the worst case, it could be possible, under certain conditions, to send bogus requests to a privileged process in order to gain additional local privileges.
• A new variant of the previously-reported Spoofed LPC Port Request vulnerability. This vulnerability affects Windows NT 4.0 and Windows 2000, and could, under a very restricted set of conditions, allow a malicious user to create a process that would run under the security context of an already-running process, potentially including System processes.

Because LPC can only be used on the local machine, none of these vulnerabilities could be exploited remotely. Instead, a malicious user could only exploit them on machines that he/she could log onto interactively. Typically, workstations and terminal servers would be chiefly at risk, because, if normal security practices have been followed, normal users will not be allowed to log onto critical servers interactively. This also means that, even in the worst case, the vulnerability would only confer additional local-'not domain-'privileges on the malicious user.