Re: infinite loop error of nmap versions > 4.20

["DePriest, Jason R." <jrdepriest () gmail com>]

On 8/21/07, edward.henke#basf-it-services.com  wrote:
> Hello,
>
> about 5 weeks ago i checked NMAP 4.22RC0 with parameters given below and
> made following notes:
>
> > i checked the new nmap version 4.22RC and got an error such that
> > after about 20 seconds CPU util. raised to 100%, no nmap-traffic was
> > generated and nmap loops infinitely.
> > I used this nmap line: nmap -sP 10.82.2,3,5,7,11.31-254
> > (some address segments within our intranet)
>
> the newest release 4.22S0C5 also shows the same effect.
> after a short time (> 20s) : 100% CPU utilization with no network traffic
> generated by NMAP
>
> kind regards
> Edward Henke

I cannot reproduce this problem.

I picked some random subnets that probably exist on my network and did
the same scan you did with 4.22SOC5 on a Debian GNU/Linux system and
4.21APLHA4 on a Windows XP system.  It worked just fine in both cases.

For more insight into what is really happening, check these
command-line options:
-v: Increase verbosity level (use twice for more effect)
-d[level]: Set or increase debugging level (Up to 9 is meaningful)
--packet-trace: Show all packets sent and received

and see if you get anything that provides any sort of insight.  You
can use them all at once and get tons of info.

-Jason

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