Re: [NSE] mysql-enum user enumeration script

[Patrik Karlsson <patrik () cqure net>]

Alexandar,

I tried this script and didn't get it to show any users even though they
existed.
I tracked the problem down to the server returning the following message;
"hostname is blocked because of many connection errors; unblock with
'mysqladmin flush-hosts'"

I think the script needs to handle this error message and report back to
avoid false negatives.
There were also some indentation cleanup that needed to be done.

Thanks,
Patrik


On Sat, Dec 8, 2012 at 10:20 AM, Aleksandar Nikolic
<nikolic.alek () gmail com>wrote:

> Resending this as i didn't get any comments , and I guess it might
> not have got attention due to list changing ...
>
>
> -------- Original Message --------
> Subject:        [NSE] mysql-enum user enumeration script
> Date:   Mon, 03 Dec 2012 21:38:59 +0100
> From:   Aleksandar Nikolic <nikolic.alek () gmail com>
> To:     nmap-dev () insecure org
>
>
>
> Hi all ,
>
> been a long time since I contributed something :)
>
> As you might have noticed, kingcope released quite a number of mysql
> vulns over the
> weekend, one of them being an user enumeration vulnerability which sounded
> like a perfect candidate for a NSE script (original release :
> http://seclists.org/fulldisclosure/2012/Dec/9 ).
> So here is my rough draft for it.
>
> The vuln lies in the fact that MySQL server, when it gets connection
> from a client using old authentication
> mechanism, responds in different ways when user does and does not exist.
> Basically , when
> user does not exist, the server replies with "Access denied for user..."
> immediately, else it waits for a
> password.
>
> I might be a little rusty with Lua and nmap dev , so do point out your
> ideas
> and suggestions for improvements.
>
> Aleksandar
>
>
>
>
>
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-- 
Patrik Karlsson
http://www.cqure.net
http://twitter.com/nevdull77
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