Re: Old traceroute error within latest nmap

[Sebastián García <sgarcia () citefa gov ar>]

Hi list and Eddie, I'm sending this just for de record.

The patch works like a charm!
See below for details.

Thanks a lot!

cheers

Sebas

El Monday 07 January 2008 09:14:30 escribió:
> Hi Sebastián,
>
> Thanks for the great bug report. The problem is that I don't have the
> right network conditions to reproduce the bug. I think I have fixed it
> now could you please try out this patch? If it works I'll add it to
> svn
>
> 'cat trace-ref-fix.patch | patch -p0' in the nmap source directory
>
> thanks
>  - eddie
>
> On 07/01/2008, Sebastián García <sgarcia () citefa gov ar> wrote:
> > Hi list, I accidentally found we still have an old traceroute error into
> > the latest svn nmap.
> >
> >
> >
> > They discuss it on September 2007, and back then noctech say:
> >
> > ---------------------------------------------------------
> >
> > whenever I run the command:
> >
> >
> >
> > nmap -v -F -O -traceroute
> >
> >
> >
> > with multiple destinations on my local network (haven't tried remote
> >
> > sites) I get the following error:
> >
> >
> >
> > nmap: traceroute.cc:939: void
> >
> > Traceroute::addConsolidationMessage(NmapOutputTable*, short
> > unsigned
> >
> > int, short unsigned int): Assertion `ref_ipaddr.s_addr' failed.
> >
> > ---------------------------------------------------------
> >
> >
> >
> > And Eddie Bell quickly fix it, saying:
> >
> > ---------------------------------------------------------
> >
> > Hopefully fixed now. The bug was introduced in a recent change to the
> >
> > reference trace consolidation messages and was caused by timed out
> >
> > hops at the start of the reference trace
> >
> >
> >
> > It would be great if you could test the latest svn version and see if
> >
> > it fixes the error
> >
> > ---------------------------------------------------------
> >
> >
> >
> >
> >
> > Perhaps the patch that Eddie developed wasn't fully merged into the
> > mainstream nmap trunk. I couldn't see it.
> >
> >
> >
> > I should have checked it before, but under svn revision 6671 (6-1-2008) I
> > have still the same problem (note that the command is Eddie suggestion)
> >
> >
> >
> > ---------------------------------------------------------
> >
> > nmap -v -F -O -traceroute --packet-trace -v xx.xx.xx.64/27
> >
> > ...
> >
> > ...
> >
> > nmap: traceroute.cc:944: void
> > Traceroute::addConsolidationMessage(NmapOutputTable*, short
> > unsigned int, short unsigned int): Assertion `ref_ipaddr.s_addr' failed.
> >
> > Abort
> >
> > ---------------------------------------------------------
> >
> >
> >
> > I tried these versions available from insecure.org and they have the
> > problem:
> >
> > - 4.21ALPHA4
> >
> > - 4.22SOC8
> >
> > - 4.23RC3
> >
> > - 4.50
> >
> > - 4.52 (svn revision 6671)
> >
> >
> >
> > The issue is that I couldn't find an nmap version without this problem!
> >
> >
> >
> >
> >
> > A tiny analysis of the problem shows me that if you use -d1 or -d2 or
> > -d3, the problem disappears! Strange isn't it?
> >
> >
> >
> >
> >
> >
> >
> > I'm attaching the output from Eddie's suggested command using his latest
> > svn version. (sorry but the inconvenience but I obfuscated every IP, if
> > this is a problem to trace down the bug tell me so) It's "
> > complete-output-4.52-fails.txt"
> >
> > It's 2MB because of the --packet-trace
> >
> >
> >
> > I'm also attaching an nmap output with -d2, so you can see it doesn't
> > fail. It's "complete-output-4.52-d2-not-fail.txt"
> >
> >
> >
> > cheers!
> >
> >
> >
> > --
> >
> > Ing. Sebastián García
> >
> > SI6 - DINFO - CITEFA
> >
> > San Juan B. de La Salle 4397
> >
> > B1603ALO Villa Martelli - Pcia. Bs. As.
> >
> > Tel: (54-11) 4709-8285
> >
> > e-mail: sgarcia () citefa gov ar - www.citefa.gov.ar/si6/
> >
> > http://pgpkeys.mit.edu:11371/pks/lookup?op=get&search=0x4305E810



-- 
Ing. Sebastián García
SI6 - DINFO - CITEFA
San Juan B. de La Salle 4397
B1603ALO Villa Martelli - Pcia. Bs. As.
Tel: (54-11) 4709-8285
e-mail: sgarcia () citefa gov ar - www.citefa.gov.ar/si6/
http://pgpkeys.mit.edu:11371/pks/lookup?op=get&search=0x4305E810

_______________________________________________
Sent through the nmap-dev mailing list
http://cgi.insecure.org/mailman/listinfo/nmap-dev
Archived at http://SecLists.Org