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Microsoft Security Bulletin MS03-010: Flaw in RPC Endpoint Mapper Could Allow Denial of Service Attacks (331953) | |
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| Time: 17:50 EST/22:50 GMT | News Source: ActiveWin.com | Posted By: Robert Stein | ||
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Remote Procedure Call (RPC) is a protocol used by the Windows operating system. RPC provides an inter-process communication mechanism that allows a program running on one computer to seamlessly execute code on a remote system. The protocol itself is derived from the OSF (Open Software Foundation) RPC protocol, but with the addition of some Microsoft specific extensions. There is a vulnerability in the part of RPC that deals with message exchange over TCP/IP. The failure results because of incorrect handling of malformed messages. This particular vulnerabilty affects the RPC Endpoint Mapper process, which listens on TCP/IP port 135. The RPC endpoint mapper allows RPC clients to determine the port number currently assigned to a particular RPC service. | ||
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