4/4/2024 0 Comments Detect encryption typeThe administrator defines a master key which is used by IOS XE to encrypt the password. This is true encryption using 128 bit AES counter mode. In the running config these start with $1$. These should only be used if Type 6, 8, or 9 is not available on the IOS version you are running. Attempting to use Type 5 in modern IOS XE will throw an error as these will be depreciated soon. These are easily reversible with tools on the internet. These use a salted MD5 hashing algorithm. See the PSIRT below.Ĭisco IOS and Cisco IOS XE Type 4 Passwords Issue Type 5 However, the attempt was severely flawed and resulted in a hash that was weaker than a Type 5 MD5. Attempting to use Type 0 in modern IOS XE will throw an error as these will be depreciated soon.Ĭisco created Type 4 around 2013 in an attempt to upgrade Type 5. This is cleartext and should never be used in a running or startup-config. Click HERE for a great tool I've been using for years. Type 0, Type 5 and Type 7 should be migrated to other stronger methods.Use Type 6, Type 8 and Type 9 wherever possible.Use username joeblow secret mypass instead. username joeblow password mypass command should no longer be used.The enable password command should no longer be used.
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