Malformed Request to RPC Endpoint Mapper can Cause RPC ....

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Malformed Request to RPC Endpoint Mapper can Cause RPC ....

#1 Philipp

Pooh-Bah

Group: Administrators
Posts: 1964
Joined: 15-July 99

Posted 11 September 2001 - 11:16 AM

.... Service to Fail

The RPC endpoint mapper allows RPC clients to determine the port number currently assigned to a particular RPC service. The Windows NT 4.0 endpoint mapper contains a flaw that causes it to fail upon receipt of a request that contains a particular type of malformed data.

Because the endpoint mapper runs within the RPC service itself, exploiting this vulnerability would cause the RPC service itself to fail, with the attendant loss of any RPC-based services the server offers, as well as potential loss of some COM functions. Normal service could be restored by rebooting the server.

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