Re: Current NSE script errors

[Ron <ron () skullsecurity net>]

On 01/22/2010 12:34 PM, Brandon Enright wrote:
> Saw this once.  Ron, I'll get you more detail on this shortly:
>
> NSE: smb-os-discovery against a.b.17.24 threw an error!
> /home/bmenrigh/flexmap/nmap/svn/nmap//nselib/smb.lua:253: bad argument #2 to 'format' (number expected, got nil)
> stack traceback:
>         [C]: in function 'format'
>         /home/bmenrigh/flexmap/nmap/svn/nmap//nselib/smb.lua:253: in function 'get_status_name'
>         /home/bmenrigh/flexmap/nmap/svn/nmap//nselib/smb.lua:1278: in function 
> </home/bmenrigh/flexmap/nmap/svn/nmap//nselib/smb.lua:1142>
>         (tail call): ?
>         /home/bmenrigh/flexmap/nmap/svn/nmap//nselib/smb.lua:421: in function 'start_ex'
>         /home/bmenrigh/flexmap/nmap/svn/nmap//nselib/smb.lua:2865: in function 'get_os'
>         .../flexmap/nmap/svn/nmap//scripts/smb-os-discovery.nse:67: in function 
> <.../flexmap/nmap/svn/nmap//scripts/smb-os-discovery.nse:65>
>         (tail call): ?
>
>
> The same host returned this too:
>
> NSE: smb-enum-processes against a.b.17.24 threw an error!
> ...lexmap/nmap/svn/nmap//scripts/smb-enum-processes.nse:212: attempt to concatenate local 'result' (a nil value)
> stack traceback:
>         ...lexmap/nmap/svn/nmap//scripts/smb-enum-processes.nse:212: in function 
> <...lexmap/nmap/svn/nmap//scripts/smb-enum-processes.nse:205>
>         (tail call): ?
>
>
> And it returned this too:
>
> NSE: smb-check-vulns against a.b.17.24 threw an error!
> /home/bmenrigh/flexmap/nmap/svn/nmap//nselib/smb.lua:253: bad argument #2 to 'format' (number expected, got nil)
> stack traceback:
>         [C]: in function 'format'
>         /home/bmenrigh/flexmap/nmap/svn/nmap//nselib/smb.lua:253: in function 'get_status_name'
>         /home/bmenrigh/flexmap/nmap/svn/nmap//nselib/smb.lua:1278: in function 
> </home/bmenrigh/flexmap/nmap/svn/nmap//nselib/smb.lua:1142>
>         (tail call): ?
>         /home/bmenrigh/flexmap/nmap/svn/nmap//nselib/smb.lua:421: in function 
> </home/bmenrigh/flexmap/nmap/svn/nmap//nselib/smb.lua:393>
>         (tail call): ?
>         ...h/flexmap/nmap/svn/nmap//scripts/smb-check-vulns.nse:223: in function 'check_conficker'
>         ...h/flexmap/nmap/svn/nmap//scripts/smb-check-vulns.nse:449: in function 
> <...h/flexmap/nmap/svn/nmap//scripts/smb-check-vulns.nse:425>
>         (tail call): ?
>
>
> More details to follow (hopefully later today).
>
> Brandon

I fixed all of those in r16555, but I'd like more information on what
caused them.

By the looks of it, the packets were missing a significant number of
fields (previously, I was only checking if the last field was missing..
now I'm checking if the first and last are missing, therefore covering
everything between.

Ron

-- 
Ron Bowes
http://www.skullsecurity.org/
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