Security Basics mailing list archives

Re: RCP open! Yikes! What to do?


From: Ansgar Wiechers <bugtraq () planetcobalt net>
Date: Thu, 19 Sep 2013 21:34:42 +0200

On 2013-09-19 Justin Bowen wrote:
If you are certain you don't need RPC access (which many don't),
simply drop a windows firewall (or a replacement you might have in
place) entry in to block it. Port 139

Port 139 is the NetBIOS session service. The RPC port mapper is
listening on port 135/tcp, the actual RPC connections are established on
ports between 1025 and 5000 (49152 and 65535 on Vista and above). See
MSKB article 832017 [1] for an overview of the port requirements for
Windows.

Like I said: do not mess with it unless you have a clear understanding
of what it does (and how it works). RPC is required for many kinds of
remote management.

[1] http://support.microsoft.com/kb/832017

Regards
Ansgar Wiechers
-- 
"All vulnerabilities deserve a public fear period prior to patches
becoming available."
--Jason Coombs on Bugtraq

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