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Message-ID: <200308101727.h7AHRlfa018562@ns2.mmicman.com>
From: support at mmicman.com (Edward W. Ray)
Subject: TCP ports 1025-1030 and DCOM exploit
I have found that the RPC service in Windows also uses TCP ports 1025-1030
for communication with domain controllers (DCs). I found this out by
accident by blocking ports in my Windows 2003 domain and observing failed
RPC connectivity using netdiag command on clients. I also observed attempts
at connection on TCP port 1025.
Once I added TCP port 1025 to my list of allowed ports and ran netdiag, a
connection on the DC port 1025 and the client (higher port number) was
established.
Is this another possible attack vector? I have not had time to test it
myself, which is why I am asking.
Regards,
Edward W. Ray
SANS GCIA, GCIH
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