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RE: Cisco Catalyst 4006 CatOS Password Hash
From: Joey Peloquin <jpelo1 () jcpenney com>
Date: Wed, 10 Dec 2003 12:04:14 -0600

Hey Paul,

According to the crypt(3) man page [1], $2$ is blowfish.  A cursory
search at google located BestCrypt [2], by Jetico, as a possible cracker
for it.

Hope it helps.

Joey Peloquin

[1] http://www.gsp.com/cgi-bin/man.cgi?section=3&topic=crypt
[2] http://www.password-crackers.com/crack3.html

-----Original Message-----
From: Paul Bakker [mailto:bakker () fox-it com] 
Sent: Wednesday, December 10, 2003 5:33 AM
To: pen-test () securityfocus com
Subject: Cisco Catalyst 4006 CatOS Password Hash

During a pentest/audit I received from the client the configurations for
their Cisco Catalyst 4006 and their other Cisco IOS switches.

The passwords in the Cisco IOS configuration file are in in the known
usual format of the FreeBSD MD5 hash... Like $1$xxxx$xxxxxxxxxxxxxxxxxxx

These are easily crackable/recognized by both John the Ripper and

The passwords on the Catalyst are in the same format (for the eye), but
instead of starting with $1$ they start with $2$..... Both John and Cain
do not recognize these hashes.

Can anybody shed some light on the hash function used to create these
and any tools that can be used to eudit the password strenght of these
passwords (Or how John or Cain can be sed for this...)

Paul Bakker


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