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Re: [NSE] sip-extensions.nse
From: Hani Benhabiles <kroosec () gmail com>
Date: Sat, 30 Jun 2012 11:14:41 +0100

On 06/29/2012 09:07 PM, Patrik Karlsson wrote:


On Fri, Jun 29, 2012 at 9:41 PM, Hani Benhabiles <kroosec () gmail com <mailto:kroosec () gmail com>> wrote:

    Hi list,

    description = [[
    Scans a numeric range of SIP extensions to find valid ones.

    The script works by sending REGISTER SIP requests to the server
    with the
    specified extension number and checking for the response status
    code in order
    to know if an extension is valid. If a response status code is 401 or
    407, it means that the extension is valid and requires
    authentication. If the
    response status code is 200, it means that the extension exists
    and doesn't
    require any authentication while a 403 response status code means that
    extension exists but access is forbidden. To skip false positives,
    the script
    begins by sending a REGISTER request for a random extension and
    checking for
    response status code.
    ]]

    ---
    -- () args sip-extensions.minext Extension value to start enumeration
    from.
    --  Defaults to <code>0</code>.
-- -- () args sip-extensions.maxext Extension value to end enumeration at.
    --  Defaults to <code>999</code>.
    --
    -- () args sip-extensions.padding Number of digits to pad zeroes up to.
    --  Defaults to <code>0</code>. No padding if this is set to zero.
    --
    -- () args sip-extensions.threads Number of threads to use.
    --  Defaults to <code>1</code>.
-- -- () usage
    -- nmap --script=sip-extensions -sU -p 5060 <targets>
    --
    -- nmap --script=sip-extensions -sU -p 5060 <targets>
    -- script-args sip-extensions.padding=4, sip-extensions.minext=1000,
    -- sip-extensions.maxext=9999
    --
    -- () output
    -- 5060/udp open sip
    -- | sip-extensions:
    -- |   101 : Authentication required.
    -- |   112 : Authentication required.
    -- |_  150 : No authentication.


-- Hani Benhabiles

    Twitter: https://twitter.com/#!/kroosec
    <https://twitter.com/#%21/kroosec>
    Blog: http://kroosec.blogspot.com


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Hi Hani,
There seems to be some overlap here with sip-enum-users?
Or am I missing something?

Cheers,
//Patrik

--
Patrik Karlsson
http://www.cqure.net
http://twitter.com/nevdull77


Hi Patrik,

SIP servers in the wild use usually either usernames or numbers as extensions. The later seems to be more common as I came across it more often and given how many testing tools and suites (i.e sipvicious, metasploit aux etc...) focus on scanning ranges of numbers (with things such as padding 0's) rather than on usernames from a dictionnary list. I believe having two separates scripts that do simple and effective work depending on the situation is better than one bloated script with many options and requiring the user to supply many script-arguments.

Though, I believe that the name sip-extensions which is not very clear should be changed to something more descriptive such as sip-enum-numbers.

Cheers,
Hani.

--
Hani Benhabiles

Twitter: https://twitter.com/#!/kroosec
Blog: http://kroosec.blogspot.com

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