Cisco password 5 decrypt

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A non-Cisco source has released a program to decrypt user passwords and other passwords in Cisco configuration files. The program will not decrypt passwords set with the enable secret command. The unexpected concern that this program has caused among Cisco customers has led us to suspect that many customers are relying on Cisco password encryption for more security than it was designed to provide. This document explains the security model behind Cisco password encryption, and the security limitations of that encryption. For more information on document conventions, refer to the Cisco Technical Tips Conventions. User passwords and most other passwords not enable secret s in Cisco IOS configuration files are encrypted using a scheme that is very weak by modern cryptographic standards. Although Cisco does not distribute a decryption program, at least two different decryption programs for Cisco IOS passwords are available to the public on the Internet; the first public release of such a program of which Cisco is aware was in early We would expect any amateur cryptographer to be able to create a new program with little effort. The scheme used by Cisco IOS for user passwords was never intended to resist a determined, intelligent attack. The encryption scheme was designed to avoid password theft via simple snooping or sniffing. It was never intended to protect against someone conducting a password-cracking effort on the configuration file. Because of the weak encryption algorithm, it has always been Cisco's position that customers should treat any configuration file containing passwords as sensitive information, the same way they would treat a cleartext list of passwords. The enable password command should no longer be used. Use the enable secret command for better security. The only instance in which the enable password command might be tested is when the device is running in a boot mode that does not support the enable secret command. Enable secrets are hashed using the MD5 algorithm. As far as anyone at Cisco knows, it is impossible to recover an enable secret based on the contents of a configuration file other than by obvious dictionary attacks. Indeed, the strength of the encryption used is the only significant difference between the two commands. Look at your boot image using the show version command from your normal operating mode Full Cisco IOS image to see whether the boot image supports the enable secret command. If it does, remove enable password. If the boot image does not support enable secretnote the following caveats:. Setting an enable password might be unnecessary if you have physical security so that no one can reload the device to the boot image. If someone has physical access to the device, he can easily subvert the device security without needing to access the boot image. If you set the enable password to the same as the enable secretyou have made the enable secret as prone to attack as the enable password. If you set enable password to a different value because the boot image doesn't support enable secretyour router administrators must remember a new password that is used infrequently on ROMs that don't support the enable secret command. By having a separate enable password, administrators may not remember the password when they are forcing downtime for a software upgrade, which is the only reason to log in to boot mode. Almost all passwords and other authentication strings in Cisco IOS configuration files are encrypted using the weak, reversible scheme used for user passwords. To determine which scheme has been used to encrypt a specific password, check the digit preceding the encrypted string in the configuration file. If that digit is a 7, the password has been encrypted using the weak algorithm. If the digit is a 5, the password has been hashed using the stronger MD5 algorithm. When you send configuration information in e-mail, you should sanitize the configuration from type 7 passwords. You can use the show tech-support command, which sanitizes the information by default. Sample show tech-support command output is shown below. When saving your configuration files on a Trivial File Transfer Protocol TFTP server, change the privileges on that file when it is not in use or put it behind a firewall.

Cisco Type 7 Password Decrypt / Decoder / Cracker Tool


GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together. If nothing happens, download GitHub Desktop and try again. If nothing happens, download Xcode and try again. If nothing happens, download the GitHub extension for Visual Studio and try again. This tool has evolved and can also decode Cisco type 7 passwords and bruteforce Cisco type 5 passwords using dictionary attacks. The PCF files. This tool requires the pyCrypto and passlib modules. Skip to content. Dismiss Join GitHub today GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together. Sign up. Python Branch: master. Find file. Sign in Sign up. Go back. Launching Xcode If nothing happens, download Xcode and try again. Latest commit. Latest commit deea0c8 Jul 8, Found passwords to test. You signed in with another tab or window. Reload to refresh your session. You signed out in another tab or window. Dec 14, Mar 30, Jul 8,

How to crack Cisco Type 5 (MD5) Passwords


February 9, 6 Comments. For example:. This is a 3 stage process. 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.? Next, we have to convert the password string into a base64 encoded string. Filed under hacking. I am about to begin my own blog and was wondering if you know where the best place to purchase a blog url is? Thank you. I registered an account at wordpress. It auto generates my page names based on the title URL. As far as I know all of this is included. Hi, what about if a wanted to do it on Windows, Do I have to convert the password string into a base64 encoded string? I,m trying but is not working at all. Thanks in advanced for your help and support. You would still require the base64 decoding as that is the format BarsWF wants. I have done this and it is much easier and better. You are commenting using your WordPress. You are commenting using your Google account. You are commenting using your Twitter account. You are commenting using your Facebook account. Notify me of new comments via email. Notify me of new posts via email. Create a free website or blog at WordPress. Home About. Posts Comments.

Chapter 5 – Configuring and Encrypting Passwords on Cisco Routers and Switches


I have seen type 7 decryptor available but not for Type 5. Please suggest if there is any technique. That said, if you are willing to dive into some dark hacker cracker stuff, here are two links to scripts you can use I hope posting those links does not earn me jail time :. In addition to the practical hints of Mark and Georg we should look at some background information:. There is no decryption as the passwords are not encrypted but hashed. Although it's also a cryptographic operation, it's not a reversible encryption but a one-way function. All you can do is to take many different passwords, hash them and compare the result to your given hash-value. The used hash-algorithm with type 5 is salted md5 which can be computed lightning fast on modern computers. If you know that the original password is not too complex and long, it should be possible with the given tools. These are the password-types 8 and 9. Type 5 password are MD5 hashes. An MD5 Hash is just that. A hash is a one way function and cannot be decrypted. Buy or Renew. Find A Community. We're here for you! Turn on suggestions. Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type. Showing results for. Search instead for. Did you mean:. Decrypt Type 5 password. Labels: Other Routing. Georg Pauwen. VIP Mentor. James, type 5 passwords are really hard to crack, especially since Cisco uses I think the 'salted' version of the hash. Mark Malone. Haven't tried it but there. Karsten Iwen. In addition to the practical. In addition to the practical hints of Mark and Georg we should look at some background information: There is no decryption as the passwords are not encrypted but hashed. Improve the world by lending money to the working poor or share a meal with a hungry child. Re: Decrypt Type 5 password. Latest Contents. Created by AqeelHasan on PM. Powershell scripts for Cisco switch inventory. Does anyone have or know of any Powershell scripts to collect information from Cisco switches Nexus, layer 2 and output to csv or Excel? Need to document a number of Cisco switches with port, vlan, routes, ACL information. Created by ciscomoderator on PM. Created by miuddin on PM.

Cisco Type 7 Password Decryption

Passwords with Cisco Router configurations can be stored in a number of different forms. Each with a varied degree of security. Cisco Type 7 based secrets are a very poor and legacy way of storing the password. Anyone with access to the systems running configuration will be able to easily decode the Cisco Type 7 value. This is demonstrated in the form below. A type 7 password is not actually encrypted at all it is simply encoded. The fact that it is encoded means it can be decoded very easily. Enter a Cisco type 7 secret below to have it decoded immediately. Decoding is virtually instantaneous. Over time Cisco has improved the security of its password storage within the standard Cisco Configuration. From type 0 which is password in plain text up to the latest type 8 and type 9 Cisco password storage types. In this example we can see a type 0 password configuration. There is no obsfucation or hashing of the password. It simply sits in the configuration in plain text. When looking at a Cisco Configuration file you can easily spot the type of security used with the password by looking for the enable line. Here is an example of a password of type You can see that while the password is obfuscated getting the password for this device would not be difficult at all. You could use the form above to quickly decode the type 7 password. A very common example, that provided significantly more security than the Cisco Type 7 encoding is to use MD5 with a Salt. In the configuration file this would be shown as:. Additional types of encryption were used, including type 4 that was found to have a number of flaws. Even though it was encrypted using SHA there was no salt used leaving it vulnerable to brute force attacks. Newer versions of IOS have both type 8 and type 9 these are significantly harder to brute force and should be used if you can to keep your systems secure. As with all password security using a long and complicated string of characters will always make things harder for the attacker except of course if you are using type 0 or type 7 on a Cisco Device. Both Hashcat and John the Ripper are able to brute force common Cisco password types. Cisco Type 7 and other Password Types Passwords with Cisco Router configurations can be stored in a number of different forms. The form below uses a simple Python Script to decode the entered value. Decode Cisco Type 7.

Kali Linux 2: Cisco Password Cracker



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