Re: nmap smb-brute questions

On 2013-09-16 ToddAndMargo wrote:
> When I look at my /etc/services, I get the following smb
> services:
> 
>       netbios-ns      137/tcp  # NETBIOS Name Service
>       netbios-ns      137/udp
>       netbios-dgm     138/tcp  # NETBIOS Datagram Service
>       netbios-dgm     138/udp
>       netbios-ssn     139/tcp  # NETBIOS session service
>       netbios-ssn     139/udp
>       microsoft-ds    445/tcp
>       microsoft-ds    445/udp
> 
> Question 1):  Why is the example only checking UDP:137,
> and TCP:139?  Ports 137,138,139,445 are all using both
> UDP and TCP according to /etc/services.  Is the example
> not meant to be a good example?

AFAIK was IANA practice to assign UDP and TCP port number for a service,
regardless of which of the two protocols it actually used. NetBIOS does
not use 137/tcp and 139/udp, so it'd be pointless to scan those ports.

[...]
> On the following command, I also get back:
>    # nmap --script smb-brute.nse  -p 137,138,139,445 192.168.255.116
>    ...
>    Host script results:
>    | smb-brute:
>    |   administrator:<blank> => Valid credentials, account disabled
>    |_  guest:<blank> => Valid credentials, account disabled
> 
> Question 4): does the "Valid credentials, account disabled" mean
> the script could not break in?

Yes.

Regards
Ansgar Wiechers
-- 
"All vulnerabilities deserve a public fear period prior to patches
becoming available."
--Jason Coombs on Bugtraq

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