LYCOS RETRIEVER 
Msn Chat: Msn Chat Control
built 656 days ago
GateKeeper is a SASL Authentication type and is used by the MSN Chat control as a means of Authentication between the MSN Chat Control and the Server. As specified in the IRCX Draft, The client sends a string using the prefix "I" for initial and then the client and server will attempt to authenticate. The GateKeeper mechanism is not publicly documented.
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The MSN Chat Control has some /commands available to it, similar to the ones that mIRC and other chat clients have. It doesn't have nearly as many, but some of the ones it does have can be useful.
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This vulnerability occurs because of an unchecked buffer in the code that handles the input of a parameter in the MSN Chat control. By invoking this parameter in a particular manner, an attacker can overflow the buffer and can cause code to run.
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The legality of sites offering the MSN Chat Control has been in question for some time due to many "Clone Sites" hosting the Chat Control. The Chat Control download is publicly available by Microsoft to download at [1].
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Msn Chat Control