RE: Craking Serv-u passwords stored in .ini file.

["Ferruh Mavituna" <ferruh () mavituna com>]

Previous version of Serv-u was keep passwords in plain text format.

Now it's MD5(length+2). To get access password file of Serv-u you should
access files on server. You need read permissions to access that file.

I think it's pretty secure for a FTP Server.

Ferruh Mavituna
http://ferruh.mavituna.com
PGP Key: http://ferruh.mavituna.com/pgpkey.asc 

> -----Original Message-----
> From: Scovetta, Michael V [mailto:Michael.Scovetta () ca com]
> Sent: Thursday, September 02, 2004 8:21 PM
> To: M. D.; pen-test () securityfocus com
> Subject: RE: Craking Serv-u passwords stored in .ini file.
>
> Nekro--
>
> Maybe I'm just ignorant here, but if you are referring to the recent
> collision attacks on MD5, how does such an attack compromise serv-u
> security? Being able to create two strings that hash to the same value
> is orders of magnitude easier than finding a string that hashes to some
> particular hash value.
>
> From what I see, the serv-u hash security is weak not because of the
> weakness of MD5 or any other hashing algorithm, but rather because a
> simple dictionary attack (performaed 26^2 times) would be more effective
> than attempting a preimage attack on the final hashed value.
>
> If there's something here that I'm not getting, please let me know.
>
> Regards,
>
> Michael Scovetta
>
> -----Original Message-----
> From: M. D. [mailto:nekromancer () lycos com]
> Sent: Wednesday, September 01, 2004 11:37 AM
> To: pen-test () securityfocus com
> Subject: RE: Craking Serv-u passwords stored in .ini file.
>
> Dear colleagues,
>
> Googling around shows THIS:
>
> http://www.cat-soft.com/serv-u-list/08%2014-Apr-99%20To%2005-Aug-02/msg0
> 9499.html
>
> With that information and any good MD5 hash cracker (Lepton's Crack
> comes to mind, but feel free to chose any other, I'm a bit biased being
> one of the authors ;-) I think that you can try to bruteforce these
> passwords.
> Hope this info helps.
> Cheers,
>
> Nekromancer
>
> --
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learn to write exploits and attack security infrastructure. Attend a course
taught by an expert instructor with years of in-the-field pen testing
experience in our state of the art hacking lab. Master the skills of an
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