full-disclosure - Re: 0trace - traceroute on established connections

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Date: Mon, 8 Jan 2007 23:10:32 -0500
From: "Brendan Dolan-Gavitt" <mooyix@...il.com>
To: "Matthew Flaschen" <matthew.flaschen@...ech.edu>
Cc: full-disclosure <full-disclosure@...ts.grok.org.uk>
Subject: Re: 0trace - traceroute on established connections

A much easier way is to write your own usleep and drop it in /bin:

---usleep.c---
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

int main (int argc, char **argv) {
    usleep(atoi(argv[1]));
    return 0;
}
---usleep.c---

[note: doesn't check error conditions]

0trace worked brilliantly on my debian system after putting this
usleep in place, so Kubuntu should be basically the same.

On 1/8/07, Matthew Flaschen <matthew.flaschen@...ech.edu> wrote:
> Michal Zalewski wrote:
> > I'd like to announce the availability of a free security reconnaissance /
> > firewall bypassing tool called 0trace.
>
> Good work.  Are you going to put it under a free license?
>
> > Enough chatter - the tool is available here (Linux version):
> >
> >   http://lcamtuf.coredump.cx/soft/0trace.tgz
> >
> > Note: this is a 30-minute hack that involves C code coupled with a cheesy
> > shellscript. It may not work on non-Linux systems, and may fail on some
> > Linuxes, too. It could be improved in a number of ways - so if you like
> > it, rewrite it.
>
> I've been trying to get it to work on Ubuntu Edgy.  That system doesn't
> have usleep, so I made the following kludge:
> -------------------------------------------------------------------------
> if [[ ! -x /bin/usleep && ! -x /bin/sleep ]]; then
>   echo "[-] Neither /bin/sleep nor /bin/usleep are found on this system,
> sorry." 1>&2
>   exit 1
> fi
>
> usleep()
> {
>   if [ -x /bin/usleep ]; then
>     /bin/usleep $1
>   elif [ -x /bin/sleep ]; then
>     /bin/sleep $(echo ".000001 * $1" | bc)
>   fi
> }
> -------------------------------------------------------------------------
>
> However, that leaves me with other problems:
>
> [+] Waiting for traffic from target on eth0...
> [+] Traffic acquired, waiting for a gap...
> ./0trace.sh: line 85: printf: 0x: invalid number
> ./0trace.sh: line 86: printf: 0x: invalid number
> [+] Target acquired: : -> : (0/0).
> [+] Setting up a sniffer...
> [+] Sending probes...
> Usage: ./sendprobe src_ip dst_ip sport dport seq ack
>
> I'm using Kubuntu Edgy.  The bash version is 3.1.17(1)-release
> (i486-pc-linux-gnu).  Anyone have tips?
>
> Thanks,
>
> Matthew Flaschen
>
>
>
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Full-Disclosure - We believe in it.
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