Re: RPC errors

[Henry Linneweh <hrlinneweh () sbcglobal net>]

This should help some for people who are worried
http://securityresponse.symantec.com/avcenter/FixBlast.exe
 
-Henry

"Steven M. Bellovin" <smb () research att com> wrote:

In message 
, 
"Dominic J. Eidson" writes:
> On Mon, 11 Aug 2003, Jack Bates wrote:
>
> > Sean Donelan wrote:
> >
> > > http://isc.sans.org/diary.html?date=2003-08-11
> > > The worm uses the RPC DCOM vulnerability to propagate. One it finds a
> > > vulnerable system, it will spawn a shell and use it to download the actual
> > > worm via tftp.
> > >
> > > The name of the binary is msblast.exe. It is packed with UPX and will self
> > > extract. The size of the binary is about 11kByte unpacked, and 6kBytes
> > > packed:
>
> Has anyone seen/heard of this virus propagating through email in any way?
>
> We appear to have been infected on a network that is very heavily
> firewalled from the outside, and are trying to track down possibly entry
> methods the worm might have had...

A large number of networks have unknown and unauthorized back doors. 
If it's a decent-sized network and you haven't audited it, don't assume 
that the firewalling is effective. (My co-author on "Firewalls and 
Internet Security" book, Bill Cheswick, is CTO of a startup that maps 
intranets for just this reason.)


--Steve Bellovin, http://www.research.att.com/~smb