Re: Re: ICMP Destination Unreachable Port Unreachable

["Adriel T. Desautels" <simon () snosoft com>]

Well,
    There's something to the traffic that I am seeing. The payloads are
always changing and contain significantly different data. One of the
payloads was packed full of X'es, the other was packed full of |'s.
Check it out.

Event: ICMP Destination Unreachable Port Unreachable
Category: misc-activity
Level: 3

Sensor: IDS-1 (1)
Date / Time: 08/15/2006 14:14:41

Module: xxx

Event ID: 5907
Original Event ID: 5864

Source: 82.246.252.214 : 0
Destination: xx.xx.xx.50 : 0

--
Payload Length: 152

000 : 00 00 00 00 45 00 00 9C 46 64 40 00 EE 11 2C 92   ....E...Fd@...,.
010 : 46 5B 83 32 52 F6 FC D6 00 35 A4 10 00 88 2B 28   F[.2R....5....+(
020 : 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58   XXXXXXXXXXXXXXXX
030 : 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58   XXXXXXXXXXXXXXXX
040 : 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58   XXXXXXXXXXXXXXXX
050 : 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58   XXXXXXXXXXXXXXXX
060 : 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58   XXXXXXXXXXXXXXXX
070 : 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58   XXXXXXXXXXXXXXXX
080 : 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58   XXXXXXXXXXXXXXXX
090 : 58 58 58 58 58 58 58 58                           XXXXXXXX
--



Dude VanWinkle wrote:
> On 8/15/06, Julio Cesar Fort <julio () rfdslabs com br> wrote:
> > Dude VanWinkle,
> >
> > > <snip>
> > > -----------------------------
> > > Looks to me like they are using port 0.
> > > http://www.grc.com/port_0.htm
> > > -JP
> >
> > *NEVER TRUST* Steve Gibson. I bet he smokes crack. See
> > http://attrition.org/errata/charlatan.html#gibson for more details.
>
>
> thanks for the tip!
>
> Still, I cant seem to help but think there is something to this port 0
> thingy
>
> http://www.networkpenetration.com/port0.html
>
> <snip>
>
> 3. Port 0 OS Fingerprinting
> ---------------------------
> As port 0 is reserverd for special use as stated in RFC 1700. Coupled
> with the fact that this port number is reassigned by the OS, no
> traffic should flow over the internet using this port. As the
> specifics are not clear different OS's have differnet ways of handling
> traffic using port 0 thus they can be fingerprinted.
>
> --------------------------------------------
>
> I guess that is just a reaction to traffic and not actual traffic via
> port 0, but still nifty info
>
> -JP
>
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-- 

Regards, 
    Adriel T. Desautels
    SNOsoft Research Team
    Office: 617-924-4510 || Mobile : 857-636-8882

    ----------------------------------------------
    Vulnerability Research and Exploit Development





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