Script telnet-encryption

Script types: portrule
Categories: safe, discovery
Download: https://svn.nmap.org/nmap/scripts/telnet-encryption.nse

Script Summary

Determines whether the encryption option is supported on a remote telnet server. Some systems (including FreeBSD and the krb5 telnetd available in many Linux distributions) implement this option incorrectly, leading to a remote root vulnerability. This script currently only tests whether encryption is supported, not for that particular vulnerability.

References:

Example Usage

nmap -p 23 <ip> --script telnet-encryption

Script Output

PORT   STATE SERVICE REASON
23/tcp open  telnet  syn-ack
| telnet-encryption:
|_  Telnet server supports encryption

Requires


Authors:

  • Patrik Karlsson
  • David Fifield
  • Fyodor

License: Same as Nmap--See https://nmap.org/book/man-legal.html