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Enable and Enable Secret password on CISCO Switch. March 8, 2016 by virdih Leave a Comment. ENABLE SECRET PASSWORD. Enable password uses a weak encryption algorithm. To overcome this situation, we use enable secret password on the device. When both enable password and enable secret password are configured, enable secret password is used to. If wpa-psk ascii 0 is used then the ascii text that follows is clear text and its not encrypted. Encryption Methods That Cannot be Decrypted. As opposed to Type 7 Passwords which can easily be decrypted, Secret 5 passwords cannot be decrypted as the password has ben hashed with MD5.This is also the recommened way of creating and storing passwords on your Cisco devices. HiAny have a Cisco Router password decryption tool or url. enable secret level 5 not 7! I really need it. Unfortunately, it is impossible to reverse level 5 passwords.
Update #2: This article has been updated over at https://retrorabble.wordpress.com/2013/10/12/cracking-cisco-password-hashes-part-2/
UPDATE: See bottom of post for a way to run MD5 cracking on Linux
Well, I managed to find this information out by phoning Cisco directly, and since most of the information on this subject seems to be either plain wrong or incomprehensible rubbish spouted by people with no idea what checking up on facts or cross referencing is, I’ve decided to share my knowledge here:
Cisco type 5 passwords are based on FREEBSD’s MD5 function with a SALT included to make life harder; however, as a typical type 5 password also includes the SALT, it does tend to defeat the purpose of SALTing values. For example:
Decrypt Cisco Secret 4 Cd
enable secret 5 $1$mERr$hx5rVt7rPNoS4wqbXKX7m0
Let’s break that down:
enable secret 5 This tells us that the password is an MD5 SALTed password.
$1$ Tells us that yes, it really is a SALTed MD5 password
mERr This is our SALT. From here, we can use a program to crack the MD5 hash I have used http://www.darknet.org.uk/2009/07/crack-pl-sha1-md5-hash-cracking-tool/
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hx5rVt7rPNoS4wqbXKX7m0 And this is our MD5 hash
PS: I found that password hash using the Googledork: inurl:startup-config “enable secret 5”
Update: After some discussion with another member of my local LUG, we managed to get BarsWF MD5 (http://3.14.by/en/md5) cracker running under Wine. This is a 3 stage process
1.) Grab a copy of BarsWF (if you have CUDA, yuo will need to run it under Windows, unless you want to port it to Linux. I couldn’t get the 64 bit binary running under Wine, so ran with the x86 edition.
2.) You need a cisco type 5 password hash, of course, you already own a cisco device and have generated a SALTed MD5 hash for educational purposes, right..? Let’s assume mine is hx5rVt7rPNoS4wqbXKX7m0
Next, we have to convert the password string into a base64 encoded string. I use http://www.motobit.com/util/base64-decoder-encoder.asp But had to change the character set to windows-1250 which gave me the string aHg1clZ0N3JQTm9TNHdxYlhLWDdtMA now, we can attempt a brute force on it.
3.) Now, all we need to do is force the issue:
retrorabble@Lisa[~]$ BarsWF_SSE2_x32.exe -c 0aA~ -h aHg1clZ0N3JQTm9TNHdxYlhLWDdtMA
4.) If you are on Linux and use CUDA (or whatever ATI calls it) have a look at http://www.networkworld.com/community/node/43721or if you realy want to push the envelope: http://hashcat.net/hashcat/expect hashcat to feature in a future posting as it seems to be what I am looking for (i.e. a multi-threaded, multi core, non GPU, bruteforcer for salted MD5 passwords).
Decrypt Cisco Secret 4 Piece
I will update this post as and when new information is added.